diff --git a/.env b/.env
index b1622473..32adc06e 100644
--- a/.env
+++ b/.env
@@ -13,6 +13,7 @@ DISCOVERY_API_BASE_URL=''
 DISCUSSIONS_MFE_BASE_URL=''
 ECOMMERCE_BASE_URL=''
 ENABLE_JUMPNAV='true'
+ENABLE_NEW_SIDEBAR=''
 ENABLE_NOTICES=''
 ENTERPRISE_LEARNER_PORTAL_HOSTNAME=''
 EXAMS_BASE_URL=''
diff --git a/.env.development b/.env.development
index 34e014ef..aa709821 100644
--- a/.env.development
+++ b/.env.development
@@ -13,6 +13,7 @@ DISCOVERY_API_BASE_URL='http://localhost:18381'
 DISCUSSIONS_MFE_BASE_URL='http://localhost:2002'
 ECOMMERCE_BASE_URL='http://localhost:18130'
 ENABLE_JUMPNAV='true'
+ENABLE_NEW_SIDEBAR=''
 ENABLE_NOTICES=''
 ENTERPRISE_LEARNER_PORTAL_HOSTNAME='localhost:8734'
 EXAMS_BASE_URL=''
diff --git a/.env.test b/.env.test
index b2e2ba7c..34745fe2 100644
--- a/.env.test
+++ b/.env.test
@@ -13,6 +13,7 @@ DISCOVERY_API_BASE_URL='http://localhost:18381'
 DISCUSSIONS_MFE_BASE_URL='http://localhost:2002'
 ECOMMERCE_BASE_URL='http://localhost:18130'
 ENABLE_JUMPNAV='true'
+ENABLE_NEW_SIDEBAR=''
 ENABLE_NOTICES=''
 ENTERPRISE_LEARNER_PORTAL_HOSTNAME='localhost:8734'
 EXAMS_BASE_URL='http://localhost:18740'
diff --git a/src/courseware/course/Course.jsx b/src/courseware/course/Course.jsx
index 0ebc75e8..9926db09 100644
--- a/src/courseware/course/Course.jsx
+++ b/src/courseware/course/Course.jsx
@@ -15,6 +15,8 @@ import ContentTools from './content-tools';
 import CourseBreadcrumbs from './CourseBreadcrumbs';
 import SidebarProvider from './sidebar/SidebarContextProvider';
 import SidebarTriggers from './sidebar/SidebarTriggers';
+import NewSidebarProvider from './new-sidebar/SidebarContextProvider';
+import NewSidebarTriggers from './new-sidebar/SidebarTriggers';
 
 import { useModel } from '../../generic/model-store';
 
@@ -34,6 +36,7 @@ const Course = ({
   } = useModel('courseHomeMeta', courseId);
   const sequence = useModel('sequences', sequenceId);
   const section = useModel('sections', sequence ? sequence.sectionId : null);
+  const enableNewSidebar = getConfig().ENABLE_NEW_SIDEBAR;
 
   const pageTitleBreadCrumbs = [
     sequence,
@@ -64,12 +67,14 @@ const Course = ({
     ));
   }, [sequenceId]);
 
+  const SidebarProviderComponent = enableNewSidebar === 'true' ? NewSidebarProvider : SidebarProvider;
+
   return (
-    <SidebarProvider courseId={courseId} unitId={unitId}>
+    <SidebarProviderComponent courseId={courseId} unitId={unitId}>
       <Helmet>
         <title>{`${pageTitleBreadCrumbs.join(' | ')} | ${getConfig().SITE_NAME}`}</title>
       </Helmet>
-      <div className="position-relative d-flex align-items-start">
+      <div className="position-relative d-flex align-items-center mb-4 mt-1">
         <CourseBreadcrumbs
           courseId={courseId}
           sectionId={section ? section.id : null}
@@ -87,7 +92,7 @@ const Course = ({
               contentToolsEnabled={course.showCalculator || course.notes.enabled}
               unitId={unitId}
             />
-            <SidebarTriggers />
+            {enableNewSidebar === 'true' ? <NewSidebarTriggers /> : <SidebarTriggers /> }
           </>
         )}
       </div>
@@ -113,7 +118,7 @@ const Course = ({
         onClose={() => setWeeklyGoalCelebrationOpen(false)}
       />
       <ContentTools course={course} />
-    </SidebarProvider>
+    </SidebarProviderComponent>
   );
 };
 
diff --git a/src/courseware/course/CourseBreadcrumbs.jsx b/src/courseware/course/CourseBreadcrumbs.jsx
index a49906a8..24e2f774 100644
--- a/src/courseware/course/CourseBreadcrumbs.jsx
+++ b/src/courseware/course/CourseBreadcrumbs.jsx
@@ -153,7 +153,7 @@ const CourseBreadcrumbs = ({
   }, [courseStatus, sequenceStatus, allSequencesInSections]);
 
   return (
-    <nav aria-label="breadcrumb" className="my-4 d-inline-block col-sm-10">
+    <nav aria-label="breadcrumb" className="d-inline-block col-sm-10">
       <ol className="list-unstyled d-flex flex-nowrap align-items-center m-0">
         <li className="list-unstyled col-auto m-0 p-0">
           <Link
diff --git a/src/courseware/course/new-sidebar/Sidebar.jsx b/src/courseware/course/new-sidebar/Sidebar.jsx
new file mode 100644
index 00000000..cd8d3fd5
--- /dev/null
+++ b/src/courseware/course/new-sidebar/Sidebar.jsx
@@ -0,0 +1,17 @@
+import React, { useContext } from 'react';
+
+import SidebarContext from './SidebarContext';
+import { SIDEBARS } from './sidebars';
+
+const Sidebar = () => {
+  const { currentSidebar } = useContext(SidebarContext);
+
+  if (currentSidebar === null) { return null; }
+  const SidebarToRender = SIDEBARS[currentSidebar].Sidebar;
+
+  return (
+    <SidebarToRender />
+  );
+};
+
+export default Sidebar;
diff --git a/src/courseware/course/new-sidebar/SidebarContext.js b/src/courseware/course/new-sidebar/SidebarContext.js
new file mode 100644
index 00000000..023b868c
--- /dev/null
+++ b/src/courseware/course/new-sidebar/SidebarContext.js
@@ -0,0 +1,5 @@
+import React from 'react';
+
+const SidebarContext = React.createContext({});
+
+export default SidebarContext;
diff --git a/src/courseware/course/new-sidebar/SidebarContextProvider.jsx b/src/courseware/course/new-sidebar/SidebarContextProvider.jsx
new file mode 100644
index 00000000..5f38c72e
--- /dev/null
+++ b/src/courseware/course/new-sidebar/SidebarContextProvider.jsx
@@ -0,0 +1,103 @@
+import React, {
+  useCallback, useEffect, useMemo, useState,
+} from 'react';
+import PropTypes from 'prop-types';
+
+import isEmpty from 'lodash/isEmpty';
+
+import { breakpoints, useWindowSize } from '@edx/paragon';
+
+import { getLocalStorage, setLocalStorage } from '../../../data/localStorage';
+import { useModel } from '../../../generic/model-store';
+import WIDGETS from './constants';
+import SidebarContext from './SidebarContext';
+import { SIDEBARS } from './sidebars';
+
+const SidebarProvider = ({
+  courseId,
+  unitId,
+  children,
+}) => {
+  const shouldDisplayFullScreen = useWindowSize().width < breakpoints.large.minWidth;
+  const shouldDisplaySidebarOpen = useWindowSize().width > breakpoints.medium.minWidth;
+  const query = new URLSearchParams(window.location.search);
+  const initialSidebar = (shouldDisplaySidebarOpen || query.get('sidebar') === 'true')
+    ? SIDEBARS.DISCUSSIONS_NOTIFICATIONS.ID : null;
+  const [currentSidebar, setCurrentSidebar] = useState(initialSidebar);
+  const [notificationStatus, setNotificationStatus] = useState(getLocalStorage(`notificationStatus.${courseId}`));
+  const [hideDiscussionbar, setHideDiscussionbar] = useState(false);
+  const [hideNotificationbar, setHideNotificationbar] = useState(false);
+  const [upgradeNotificationCurrentState, setUpgradeNotificationCurrentState] = useState(
+    getLocalStorage(`upgradeNotificationCurrentState.${courseId}`),
+  );
+  const topic = useModel('discussionTopics', unitId);
+  const { verifiedMode } = useModel('courseHomeMeta', courseId);
+  const isDiscussionbarAvailable = topic?.id && topic?.enabledInContext;
+  const isNotificationbarAvailable = !isEmpty(verifiedMode);
+
+  const onNotificationSeen = useCallback(() => {
+    setNotificationStatus('inactive');
+    setLocalStorage(`notificationStatus.${courseId}`, 'inactive');
+  }, [courseId]);
+
+  useEffect(() => {
+    setHideDiscussionbar(!isDiscussionbarAvailable);
+    setHideNotificationbar(!isNotificationbarAvailable);
+    setCurrentSidebar(SIDEBARS.DISCUSSIONS_NOTIFICATIONS.ID);
+  }, [unitId, topic]);
+
+  useEffect(() => {
+    if (hideDiscussionbar && hideNotificationbar) {
+      setCurrentSidebar(null);
+    }
+  }, [hideDiscussionbar, hideNotificationbar]);
+
+  const toggleSidebar = useCallback((sidebarId = null, widgetId = null) => {
+    if (widgetId) {
+      setHideDiscussionbar(prevWidgetId => (widgetId === WIDGETS.DISCUSSIONS ? true : prevWidgetId));
+      setHideNotificationbar(prevWidgetId => (widgetId === WIDGETS.NOTIFICATIONS ? true : prevWidgetId));
+    } else {
+      setCurrentSidebar(prevSidebar => (sidebarId === prevSidebar ? null : sidebarId));
+      setHideDiscussionbar(!isDiscussionbarAvailable);
+      setHideNotificationbar(!isNotificationbarAvailable);
+    }
+  }, [isDiscussionbarAvailable, isNotificationbarAvailable]);
+
+  const contextValue = useMemo(() => ({
+    toggleSidebar,
+    onNotificationSeen,
+    setNotificationStatus,
+    currentSidebar,
+    notificationStatus,
+    upgradeNotificationCurrentState,
+    setUpgradeNotificationCurrentState,
+    shouldDisplaySidebarOpen,
+    shouldDisplayFullScreen,
+    courseId,
+    unitId,
+    hideDiscussionbar,
+    hideNotificationbar,
+    isNotificationbarAvailable,
+    isDiscussionbarAvailable,
+  }), [courseId, currentSidebar, notificationStatus, onNotificationSeen, shouldDisplayFullScreen,
+    shouldDisplaySidebarOpen, toggleSidebar, unitId, upgradeNotificationCurrentState, hideDiscussionbar,
+    hideNotificationbar, isNotificationbarAvailable, isDiscussionbarAvailable]);
+
+  return (
+    <SidebarContext.Provider value={contextValue}>
+      {children}
+    </SidebarContext.Provider>
+  );
+};
+
+SidebarProvider.propTypes = {
+  courseId: PropTypes.string.isRequired,
+  unitId: PropTypes.string.isRequired,
+  children: PropTypes.node,
+};
+
+SidebarProvider.defaultProps = {
+  children: null,
+};
+
+export default SidebarProvider;
diff --git a/src/courseware/course/new-sidebar/SidebarTriggers.jsx b/src/courseware/course/new-sidebar/SidebarTriggers.jsx
new file mode 100644
index 00000000..73948e0f
--- /dev/null
+++ b/src/courseware/course/new-sidebar/SidebarTriggers.jsx
@@ -0,0 +1,21 @@
+import React, { useContext } from 'react';
+
+import SidebarContext from './SidebarContext';
+import { SIDEBAR_ORDER, SIDEBARS } from './sidebars';
+
+const SidebarTriggers = () => {
+  const { toggleSidebar } = useContext(SidebarContext);
+
+  return (
+    <div className="d-flex ml-auto">
+      {SIDEBAR_ORDER.map((sidebarId) => {
+        const { Trigger } = SIDEBARS[sidebarId];
+        return (
+          <Trigger onClick={() => toggleSidebar(sidebarId)} key={sidebarId} />
+        );
+      })}
+    </div>
+  );
+};
+
+export default SidebarTriggers;
diff --git a/src/courseware/course/new-sidebar/common/SidebarBase.jsx b/src/courseware/course/new-sidebar/common/SidebarBase.jsx
new file mode 100644
index 00000000..63e4607e
--- /dev/null
+++ b/src/courseware/course/new-sidebar/common/SidebarBase.jsx
@@ -0,0 +1,113 @@
+import React, { useCallback, useContext } from 'react';
+import PropTypes from 'prop-types';
+
+import classNames from 'classnames';
+
+import { useIntl } from '@edx/frontend-platform/i18n';
+import { Icon, IconButton } from '@edx/paragon';
+import { ArrowBackIos, Close } from '@edx/paragon/icons';
+
+import { useEventListener } from '../../../../generic/hooks';
+import WIDGETS from '../constants';
+import messages from '../messages';
+import SidebarContext from '../SidebarContext';
+
+const SidebarBase = ({
+  title,
+  ariaLabel,
+  sidebarId,
+  className,
+  children,
+  showTitleBar,
+  width,
+  allowFullHeight,
+  showBorder,
+}) => {
+  const intl = useIntl();
+  const {
+    toggleSidebar,
+    shouldDisplayFullScreen,
+    currentSidebar,
+  } = useContext(SidebarContext);
+
+  const receiveMessage = useCallback(({ data }) => {
+    const { type } = data;
+    if (type === 'learning.events.sidebar.close') {
+      toggleSidebar(currentSidebar, WIDGETS.DISCUSSIONS);
+    }
+  }, [toggleSidebar]);
+
+  useEventListener('message', receiveMessage);
+
+  return (
+    <section
+      className={classNames('ml-0 ml-lg-4 h-auto align-top', {
+        'min-vh-100': !shouldDisplayFullScreen && allowFullHeight,
+        'bg-white m-0 border-0 fixed-top vh-100 rounded-0': shouldDisplayFullScreen,
+        'd-none': currentSidebar !== sidebarId,
+        'border border-light-400 rounded-sm': showBorder,
+      }, className)}
+      data-testid={`sidebar-${sidebarId}`}
+      style={{ width: shouldDisplayFullScreen ? '100%' : width }}
+      aria-label={ariaLabel}
+    >
+      {shouldDisplayFullScreen
+        && (
+        <div
+          className="pt-2 pb-2.5 border-bottom border-light-400 d-flex align-items-center ml-2"
+          onClick={() => toggleSidebar(null)}
+          onKeyDown={() => toggleSidebar(null)}
+          role="button"
+          tabIndex="0"
+          alt={intl.formatMessage(messages.responsiveCloseSidebarTray)}
+        >
+          <Icon src={ArrowBackIos} />
+          <span className="font-weight-bold m-2 d-inline-block">
+            {intl.formatMessage(messages.responsiveCloseSidebarTray)}
+          </span>
+        </div>
+        )}
+      {showTitleBar && (
+        <>
+          <div className="d-flex align-items-center">
+            <span className="p-2.5 d-inline-block">{title}</span>
+            <div className="d-inline-flex mr-2 mt-1.5 ml-auto">
+              <IconButton
+                src={Close}
+                size="sm"
+                iconAs={Icon}
+                onClick={() => toggleSidebar(sidebarId)}
+                alt={intl.formatMessage(messages.closeTrigger)}
+                className="icon-hover"
+              />
+            </div>
+          </div>
+          <div className="py-1 bg-gray-100 border-top border-bottom border-light-400" />
+        </>
+      )}
+      {children}
+    </section>
+  );
+};
+
+SidebarBase.propTypes = {
+  title: PropTypes.string.isRequired,
+  ariaLabel: PropTypes.string.isRequired,
+  sidebarId: PropTypes.string.isRequired,
+  className: PropTypes.string,
+  children: PropTypes.element.isRequired,
+  showTitleBar: PropTypes.bool,
+  width: PropTypes.string,
+  allowFullHeight: PropTypes.bool,
+  showBorder: PropTypes.bool,
+};
+
+SidebarBase.defaultProps = {
+  width: '50rem',
+  allowFullHeight: false,
+  showTitleBar: true,
+  className: '',
+  showBorder: true,
+};
+
+export default SidebarBase;
diff --git a/src/courseware/course/new-sidebar/constants.js b/src/courseware/course/new-sidebar/constants.js
new file mode 100644
index 00000000..cc938e6e
--- /dev/null
+++ b/src/courseware/course/new-sidebar/constants.js
@@ -0,0 +1,6 @@
+const WIDGETS = {
+  DISCUSSIONS: 'DISCUSSIONS',
+  NOTIFICATIONS: 'NOTIFICATIONS',
+};
+
+export default WIDGETS;
diff --git a/src/courseware/course/new-sidebar/icons/RightSidebarFilled.jsx b/src/courseware/course/new-sidebar/icons/RightSidebarFilled.jsx
new file mode 100644
index 00000000..d510f321
--- /dev/null
+++ b/src/courseware/course/new-sidebar/icons/RightSidebarFilled.jsx
@@ -0,0 +1,20 @@
+import * as React from 'react';
+
+const RightSidebarFilled = (props) => (
+  <svg
+    width={24}
+    height={24}
+    viewBox="0 0 24 24"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+    {...props}
+  >
+    <path
+      fillRule="evenodd"
+      clipRule="evenodd"
+      d="M2 22V2h20v20H2ZM14 4H4v16h10V4Z"
+      fill="currentColor"
+    />
+  </svg>
+);
+export default RightSidebarFilled;
diff --git a/src/courseware/course/new-sidebar/icons/RightSidebarOutlined.jsx b/src/courseware/course/new-sidebar/icons/RightSidebarOutlined.jsx
new file mode 100644
index 00000000..5a39aa3c
--- /dev/null
+++ b/src/courseware/course/new-sidebar/icons/RightSidebarOutlined.jsx
@@ -0,0 +1,20 @@
+import * as React from 'react';
+
+const RightSidebarOutlined = (props) => (
+  <svg
+    width={24}
+    height={24}
+    viewBox="0 0 24 24"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+    {...props}
+  >
+    <path
+      fillRule="evenodd"
+      clipRule="evenodd"
+      d="M2 2v20h20V2H2Zm18 2h-4v16h4V4ZM4 4h10v16H4V4Z"
+      fill="currentColor"
+    />
+  </svg>
+);
+export default RightSidebarOutlined;
diff --git a/src/courseware/course/new-sidebar/icons/index.js b/src/courseware/course/new-sidebar/icons/index.js
new file mode 100644
index 00000000..808ee271
--- /dev/null
+++ b/src/courseware/course/new-sidebar/icons/index.js
@@ -0,0 +1,2 @@
+export { default as RightSidebarFilled } from './RightSidebarFilled';
+export { default as RightSidebarOutlined } from './RightSidebarOutlined';
diff --git a/src/courseware/course/new-sidebar/messages.js b/src/courseware/course/new-sidebar/messages.js
new file mode 100644
index 00000000..a33c8ddd
--- /dev/null
+++ b/src/courseware/course/new-sidebar/messages.js
@@ -0,0 +1,36 @@
+import { defineMessages } from '@edx/frontend-platform/i18n';
+
+const messages = defineMessages({
+  discussionsTitle: {
+    id: 'discussions.sidebar.title',
+    defaultMessage: 'Discussions',
+    description: 'Title text for a forum where users are able to discuss course topics',
+  },
+  discussionNotificationTray: {
+    id: 'discussions.notification.tray.container',
+    defaultMessage: 'Discussion and Notification tray',
+    description: 'Discussion and Notification tray container',
+  },
+  notificationTitle: {
+    id: 'notification.tray.title',
+    defaultMessage: 'Notifications',
+    description: 'Title text displayed for the notification tray',
+  },
+  closeTrigger: {
+    id: 'tray.close.button',
+    defaultMessage: 'Close tray',
+    description: 'Button for the learner to close the sidebar',
+  },
+  openSidebarTrigger: {
+    id: 'sidebar.open.button',
+    defaultMessage: 'Show sidebar tray',
+    description: 'Button to open the sidebar tray and shows notifications and didcussions',
+  },
+  responsiveCloseSidebarTray: {
+    id: 'responsive.close.sidebar',
+    defaultMessage: 'Back to course',
+    description: 'Responsive button to go back to course and close the sidebar tray',
+  },
+});
+
+export default messages;
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsSidebar.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsSidebar.jsx
new file mode 100644
index 00000000..f1d87b2a
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsSidebar.jsx
@@ -0,0 +1,31 @@
+import React, { useContext } from 'react';
+
+import { useIntl } from '@edx/frontend-platform/i18n';
+
+import SidebarBase from '../../common/SidebarBase';
+import messages from '../../messages';
+import SidebarContext from '../../SidebarContext';
+import DiscussionsSidebar from './discussions/DiscussionsWidget';
+import NotificationTray from './notifications/NotificationsWidget';
+import { ID } from './DiscussionsNotificationsTrigger';
+
+const DiscussionsNotificationsSidebar = () => {
+  const intl = useIntl();
+  const { hideNotificationbar } = useContext(SidebarContext);
+
+  return (
+    <SidebarBase
+      ariaLabel={intl.formatMessage(messages.discussionNotificationTray)}
+      sidebarId={ID}
+      className="d-flex flex-column flex-fill"
+      showTitleBar={false}
+      showBorder={false}
+    >
+      <NotificationTray />
+      {!hideNotificationbar && <div className="my-1.5" />}
+      <DiscussionsSidebar />
+    </SidebarBase>
+  );
+};
+
+export default DiscussionsNotificationsSidebar;
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsTrigger.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsTrigger.jsx
new file mode 100644
index 00000000..15a27d15
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/DiscussionsNotificationsTrigger.jsx
@@ -0,0 +1,97 @@
+import React, { useContext, useEffect, useMemo } from 'react';
+import PropTypes from 'prop-types';
+
+import { useDispatch } from 'react-redux';
+
+import { getConfig } from '@edx/frontend-platform';
+import { useIntl } from '@edx/frontend-platform/i18n';
+import { Icon, IconButton } from '@edx/paragon';
+
+import { getLocalStorage, setLocalStorage } from '../../../../../data/localStorage';
+import { getSessionStorage, setSessionStorage } from '../../../../../data/sessionStorage';
+import { useModel } from '../../../../../generic/model-store';
+import { getCourseDiscussionTopics } from '../../../../data/thunks';
+import { RightSidebarFilled, RightSidebarOutlined } from '../../icons';
+import messages from '../../messages';
+import SidebarContext from '../../SidebarContext';
+
+export const ID = 'DISCUSSIONS_NOTIFICATIONS';
+
+const DiscussionsNotificationsTrigger = ({ onClick }) => {
+  const {
+    courseId,
+    currentSidebar,
+    setNotificationStatus,
+    upgradeNotificationCurrentState,
+    isNotificationbarAvailable,
+    isDiscussionbarAvailable,
+  } = useContext(SidebarContext);
+
+  const dispatch = useDispatch();
+  const intl = useIntl();
+  const { tabs } = useModel('courseHomeMeta', courseId);
+  const baseUrl = getConfig().DISCUSSIONS_MFE_BASE_URL;
+  const edxProvider = useMemo(
+    () => tabs?.find(tab => tab.slug === 'discussion'),
+    [tabs],
+  );
+
+  useEffect(() => {
+    if (baseUrl && edxProvider) {
+      dispatch(getCourseDiscussionTopics(courseId));
+    }
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [courseId, baseUrl, edxProvider]);
+
+  /* Re-show a red dot beside the notification trigger for each of the 7 UpgradeNotification stages
+   The upgradeNotificationCurrentState prop will be available after UpgradeNotification mounts. Once available,
+  compare with the last state they've seen, and if it's different then set dot back to red */
+  function updateUpgradeNotificationLastSeen() {
+    if (upgradeNotificationCurrentState) {
+      if (getLocalStorage(`upgradeNotificationLastSeen.${courseId}`) !== upgradeNotificationCurrentState) {
+        setNotificationStatus('active');
+        setLocalStorage(`notificationStatus.${courseId}`, 'active');
+        setLocalStorage(`upgradeNotificationLastSeen.${courseId}`, upgradeNotificationCurrentState);
+      }
+    }
+  }
+
+  if (!getLocalStorage(`notificationStatus.${courseId}`)) {
+    setLocalStorage(`notificationStatus.${courseId}`, 'active'); // Show red dot on notificationTrigger until seen
+  }
+
+  if (!getLocalStorage(`upgradeNotificationCurrentState.${courseId}`)) {
+    setLocalStorage(`upgradeNotificationCurrentState.${courseId}`, 'initialize');
+  }
+
+  useEffect(() => {
+    updateUpgradeNotificationLastSeen();
+  });
+
+  const handleClick = () => {
+    if (getSessionStorage(`notificationTrayStatus.${courseId}`) === 'open') {
+      setSessionStorage(`notificationTrayStatus.${courseId}`, 'closed');
+    } else {
+      setSessionStorage(`notificationTrayStatus.${courseId}`, 'open');
+    }
+    onClick();
+  };
+
+  if (!isDiscussionbarAvailable && !isNotificationbarAvailable) { return null; }
+
+  return (
+    <IconButton
+      src={currentSidebar ? RightSidebarFilled : RightSidebarOutlined}
+      iconAs={Icon}
+      onClick={handleClick}
+      alt={intl.formatMessage(messages.openSidebarTrigger)}
+      className="icon-hover"
+    />
+  );
+};
+
+DiscussionsNotificationsTrigger.propTypes = {
+  onClick: PropTypes.func.isRequired,
+};
+
+export default DiscussionsNotificationsTrigger;
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.jsx
new file mode 100644
index 00000000..d2e9c0ee
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.jsx
@@ -0,0 +1,35 @@
+import React, { useContext } from 'react';
+
+import { ensureConfig, getConfig } from '@edx/frontend-platform';
+import { useIntl } from '@edx/frontend-platform/i18n';
+import classNames from 'classnames';
+import SidebarContext from '../../../SidebarContext';
+import messages from '../../../messages';
+
+ensureConfig(['DISCUSSIONS_MFE_BASE_URL']);
+
+const DiscussionsWidget = () => {
+  const intl = useIntl();
+  const {
+    unitId,
+    courseId,
+    hideDiscussionbar,
+    isDiscussionbarAvailable,
+    shouldDisplayFullScreen,
+  } = useContext(SidebarContext);
+  const discussionsUrl = `${getConfig().DISCUSSIONS_MFE_BASE_URL}/${courseId}/category/${unitId}`;
+
+  if (hideDiscussionbar || !isDiscussionbarAvailable) { return null; }
+
+  return (
+    <iframe
+      src={`${discussionsUrl}?inContextSidebar`}
+      className={classNames('d-flex w-100 flex-fill border border-light-400 rounded-sm', { 'vh-100': !shouldDisplayFullScreen })}
+      title={intl.formatMessage(messages.discussionsTitle)}
+      allow="clipboard-write"
+      loading="lazy"
+    />
+  );
+};
+
+export default DiscussionsWidget;
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.test.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.test.jsx
new file mode 100644
index 00000000..519aa09d
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/discussions/DiscussionsWidget.test.jsx
@@ -0,0 +1,74 @@
+import React from 'react';
+
+import MockAdapter from 'axios-mock-adapter';
+
+import { getConfig } from '@edx/frontend-platform';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
+
+import {
+  initializeMockApp, initializeTestStore, render, screen,
+} from '../../../../../../setupTest';
+import { executeThunk } from '../../../../../../utils';
+import { buildTopicsFromUnits } from '../../../../../data/__factories__/discussionTopics.factory';
+import { getCourseDiscussionTopics } from '../../../../../data/thunks';
+import SidebarContext from '../../../SidebarContext';
+import DiscussionsWidget from './DiscussionsWidget';
+
+initializeMockApp();
+
+describe('DiscussionsWidget', () => {
+  let axiosMock;
+  let mockData;
+  let courseId;
+  let unitId;
+
+  beforeEach(async () => {
+    const store = await initializeTestStore({
+      excludeFetchCourse: false,
+      excludeFetchSequence: false,
+    });
+    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
+    const state = store.getState();
+    courseId = state.courseware.courseId;
+    [unitId] = Object.keys(state.models.units);
+
+    mockData = {
+      courseId,
+      unitId,
+      currentSidebar: 'NEWSIDEBAR',
+      hideDiscussionbar: false,
+      isDiscussionbarAvailable: true,
+    };
+
+    axiosMock.onGet(`${getConfig().LMS_BASE_URL}/api/discussion/v1/courses/${courseId}`).reply(
+      200,
+      {
+        provider: 'openedx',
+      },
+    );
+    axiosMock.onGet(`${getConfig().LMS_BASE_URL}/api/discussion/v2/course_topics/${courseId}`)
+      .reply(200, buildTopicsFromUnits(state.models.units));
+    await executeThunk(getCourseDiscussionTopics(courseId), store.dispatch);
+  });
+
+  function renderWithProvider(testData = {}) {
+    const { container } = render(
+      <SidebarContext.Provider value={{ ...mockData, ...testData }}>
+        <DiscussionsWidget />
+      </SidebarContext.Provider>,
+    );
+    return container;
+  }
+
+  it('should show up if unit discussions associated with it', async () => {
+    renderWithProvider();
+    expect(screen.queryByTitle('Discussions')).toBeInTheDocument();
+    expect(screen.queryByTitle('Discussions'))
+      .toHaveAttribute('src', `http://localhost:2002/${courseId}/category/${unitId}?inContextSidebar`);
+  });
+
+  it('should show nothing if unit has no discussions associated with it', async () => {
+    renderWithProvider({ isDiscussionbarAvailable: false });
+    expect(screen.queryByTitle('Discussions')).not.toBeInTheDocument();
+  });
+});
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/index.js b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/index.js
new file mode 100644
index 00000000..6c55d1bd
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/index.js
@@ -0,0 +1,2 @@
+export { default as Sidebar } from './DiscussionsNotificationsSidebar';
+export { default as Trigger, ID } from './DiscussionsNotificationsTrigger';
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.jsx
new file mode 100644
index 00000000..26ea9ac2
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.jsx
@@ -0,0 +1,62 @@
+import React, { useContext, useEffect } from 'react';
+
+import { useModel } from '../../../../../../generic/model-store';
+import UpgradeNotification from '../../../../../../generic/upgrade-notification/UpgradeNotification';
+import WIDGETS from '../../../constants';
+import SidebarContext from '../../../SidebarContext';
+
+const NotificationsWidget = () => {
+  const {
+    courseId,
+    onNotificationSeen,
+    upgradeNotificationCurrentState,
+    setUpgradeNotificationCurrentState,
+    hideNotificationbar,
+    toggleSidebar,
+    isNotificationbarAvailable,
+    currentSidebar,
+  } = useContext(SidebarContext);
+  const course = useModel('coursewareMeta', courseId);
+
+  const {
+    accessExpiration,
+    contentTypeGatingEnabled,
+    marketingUrl,
+    offer,
+    timeOffsetMillis,
+    userTimezone,
+  } = course;
+
+  const {
+    org,
+    verifiedMode,
+  } = useModel('courseHomeMeta', courseId);
+
+  // After three seconds, update notificationSeen (to hide red dot)
+  useEffect(() => { setTimeout(onNotificationSeen, 3000); }, []);
+
+  if (hideNotificationbar || !isNotificationbarAvailable) { return null; }
+
+  return (
+    <div className="border border-light-400 rounded-sm">
+      <UpgradeNotification
+        offer={offer}
+        verifiedMode={verifiedMode}
+        accessExpiration={accessExpiration}
+        contentTypeGatingEnabled={contentTypeGatingEnabled}
+        marketingUrl={marketingUrl}
+        upsellPageName="in_course"
+        userTimezone={userTimezone}
+        shouldDisplayBorder={false}
+        timeOffsetMillis={timeOffsetMillis}
+        courseId={courseId}
+        org={org}
+        upgradeNotificationCurrentState={upgradeNotificationCurrentState}
+        setupgradeNotificationCurrentState={setUpgradeNotificationCurrentState}
+        toggleSidebar={() => toggleSidebar(currentSidebar, WIDGETS.NOTIFICATIONS)}
+      />
+    </div>
+  );
+};
+
+export default NotificationsWidget;
diff --git a/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.test.jsx b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.test.jsx
new file mode 100644
index 00000000..2164de1b
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/discussions-notifications/notifications/NotificationsWidget.test.jsx
@@ -0,0 +1,112 @@
+/* eslint-disable react/jsx-no-constructed-context-values */
+import React from 'react';
+
+import MockAdapter from 'axios-mock-adapter';
+import { Factory } from 'rosie';
+
+import { getConfig } from '@edx/frontend-platform';
+import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
+import { breakpoints } from '@edx/paragon';
+
+import { initializeMockApp, render, screen } from '../../../../../../setupTest';
+import initializeStore from '../../../../../../store';
+import { appendBrowserTimezoneToUrl, executeThunk } from '../../../../../../utils';
+import { fetchCourse } from '../../../../../data';
+import SidebarContext from '../../../SidebarContext';
+import NotificationsWidget from './NotificationsWidget';
+
+initializeMockApp();
+jest.mock('@edx/frontend-platform/analytics');
+
+describe('NotificationsWidget', () => {
+  let axiosMock;
+  let store;
+  const ID = 'NEWSIDEBAR';
+
+  const defaultMetadata = Factory.build('courseMetadata');
+  const courseId = defaultMetadata.id;
+  let courseMetadataUrl = `${getConfig().LMS_BASE_URL}/api/courseware/course/${defaultMetadata.id}`;
+  courseMetadataUrl = appendBrowserTimezoneToUrl(courseMetadataUrl);
+
+  const courseHomeMetadata = Factory.build('courseHomeMetadata');
+  const courseHomeMetadataUrl = appendBrowserTimezoneToUrl(`${getConfig().LMS_BASE_URL}/api/course_home/course_metadata/${courseId}`);
+
+  function setMetadata(attributes, options) {
+    const updatedCourseHomeMetadata = Factory.build('courseHomeMetadata', attributes, options);
+    axiosMock.onGet(courseHomeMetadataUrl).reply(200, updatedCourseHomeMetadata);
+  }
+
+  async function fetchAndRender(component) {
+    await executeThunk(fetchCourse(defaultMetadata.id), store.dispatch);
+    render(component, { store });
+  }
+
+  beforeEach(async () => {
+    global.innerWidth = breakpoints.large.minWidth;
+    store = initializeStore();
+    axiosMock = new MockAdapter(getAuthenticatedHttpClient());
+    axiosMock.onGet(courseMetadataUrl).reply(200, defaultMetadata);
+    axiosMock.onGet(courseHomeMetadataUrl).reply(200, courseHomeMetadata);
+  });
+
+  it('renders upgrade card', async () => {
+    await fetchAndRender(
+      <SidebarContext.Provider value={{
+        currentSidebar: ID,
+        courseId,
+        hideNotificationbar: false,
+        isNotificationbarAvailable: true,
+      }}
+      >
+        <NotificationsWidget />
+      </SidebarContext.Provider>,
+    );
+    const UpgradeNotification = document.querySelector('.upgrade-notification');
+
+    expect(UpgradeNotification)
+      .toBeInTheDocument();
+    expect(screen.getByRole('link', { name: 'Upgrade for $149' }))
+      .toBeInTheDocument();
+    expect(screen.queryByText('You have no new notifications at this time.'))
+      .not
+      .toBeInTheDocument();
+  });
+
+  it('renders no notifications bar if no verified mode', async () => {
+    setMetadata({ verified_mode: null });
+    await fetchAndRender(
+      <SidebarContext.Provider value={{
+        currentSidebar: ID,
+        courseId,
+        hideNotificationbar: true,
+        isNotificationbarAvailable: false,
+      }}
+      >
+        <NotificationsWidget />
+      </SidebarContext.Provider>,
+    );
+    expect(screen.queryByText('Notifications'))
+      .not
+      .toBeInTheDocument();
+  });
+
+  it('marks notification as seen 3 seconds later', async () => {
+    jest.useFakeTimers();
+    const onNotificationSeen = jest.fn();
+    await fetchAndRender(
+      <SidebarContext.Provider value={{
+        currentSidebar: ID,
+        courseId,
+        onNotificationSeen,
+        hideNotificationbar: false,
+        isNotificationbarAvailable: true,
+      }}
+      >
+        <NotificationsWidget />
+      </SidebarContext.Provider>,
+    );
+    expect(onNotificationSeen).toHaveBeenCalledTimes(0);
+    jest.advanceTimersByTime(3000);
+    expect(onNotificationSeen).toHaveBeenCalledTimes(1);
+  });
+});
diff --git a/src/courseware/course/new-sidebar/sidebars/index.js b/src/courseware/course/new-sidebar/sidebars/index.js
new file mode 100644
index 00000000..d254ecc7
--- /dev/null
+++ b/src/courseware/course/new-sidebar/sidebars/index.js
@@ -0,0 +1,13 @@
+import * as discussionsNotifications from './discussions-notifications';
+
+export const SIDEBARS = {
+  [discussionsNotifications.ID]: {
+    ID: discussionsNotifications.ID,
+    Sidebar: discussionsNotifications.Sidebar,
+    Trigger: discussionsNotifications.Trigger,
+  },
+};
+
+export const SIDEBAR_ORDER = [
+  discussionsNotifications.ID,
+];
diff --git a/src/courseware/course/sequence/Sequence.jsx b/src/courseware/course/sequence/Sequence.jsx
index 529c09b8..0c0b33e8 100644
--- a/src/courseware/course/sequence/Sequence.jsx
+++ b/src/courseware/course/sequence/Sequence.jsx
@@ -2,13 +2,14 @@
 import React, {
   useEffect, useState,
 } from 'react';
+import { getConfig } from '@edx/frontend-platform';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import {
   sendTrackEvent,
   sendTrackingLogEvent,
 } from '@edx/frontend-platform/analytics';
-import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
+import { useIntl } from '@edx/frontend-platform/i18n';
 import { useSelector } from 'react-redux';
 import SequenceExamWrapper from '@edx/frontend-lib-special-exams';
 import { breakpoints, useWindowSize } from '@edx/paragon';
@@ -19,7 +20,9 @@ import { useSequenceBannerTextAlert, useSequenceEntranceExamAlert } from '../../
 
 import CourseLicense from '../course-license';
 import Sidebar from '../sidebar/Sidebar';
+import NewSidebar from '../new-sidebar/Sidebar';
 import SidebarTriggers from '../sidebar/SidebarTriggers';
+import NewSidebarTriggers from '../new-sidebar/SidebarTriggers';
 import messages from './messages';
 import HiddenAfterDue from './hidden-after-due';
 import { SequenceNavigation, UnitNavigation } from './sequence-navigation';
@@ -32,8 +35,8 @@ const Sequence = ({
   unitNavigationHandler,
   nextSequenceHandler,
   previousSequenceHandler,
-  intl,
 }) => {
+  const intl = useIntl();
   const course = useModel('coursewareMeta', courseId);
   const {
     isStaff,
@@ -44,6 +47,7 @@ const Sequence = ({
   const sequenceStatus = useSelector(state => state.courseware.sequenceStatus);
   const sequenceMightBeUnit = useSelector(state => state.courseware.sequenceMightBeUnit);
   const shouldDisplayNotificationTriggerInSequence = useWindowSize().width < breakpoints.small.minWidth;
+  const enableNewSidebar = getConfig().ENABLE_NEW_SIDEBAR;
 
   const handleNext = () => {
     const nextIndex = sequence.unitIds.indexOf(unitId) + 1;
@@ -159,7 +163,9 @@ const Sequence = ({
             handlePrevious();
           }}
         />
-        {shouldDisplayNotificationTriggerInSequence && <SidebarTriggers />}
+        {shouldDisplayNotificationTriggerInSequence && (
+          enableNewSidebar === 'true' ? <NewSidebarTriggers /> : <SidebarTriggers />
+        )}
 
         <div className="unit-container flex-grow-1">
           <SequenceContent
@@ -185,7 +191,7 @@ const Sequence = ({
           )}
         </div>
       </div>
-      <Sidebar />
+      {enableNewSidebar === 'true' ? <NewSidebar /> : <Sidebar />}
     </div>
   );
 
@@ -221,7 +227,6 @@ Sequence.propTypes = {
   unitNavigationHandler: PropTypes.func.isRequired,
   nextSequenceHandler: PropTypes.func.isRequired,
   previousSequenceHandler: PropTypes.func.isRequired,
-  intl: intlShape.isRequired,
 };
 
 Sequence.defaultProps = {
@@ -229,4 +234,4 @@ Sequence.defaultProps = {
   unitId: null,
 };
 
-export default injectIntl(Sequence);
+export default Sequence;
diff --git a/src/generic/upgrade-notification/UpgradeNotification.jsx b/src/generic/upgrade-notification/UpgradeNotification.jsx
index c60f09b8..36b32d8c 100644
--- a/src/generic/upgrade-notification/UpgradeNotification.jsx
+++ b/src/generic/upgrade-notification/UpgradeNotification.jsx
@@ -1,9 +1,12 @@
 import React, { useEffect } from 'react';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
+import {
+  useIntl, FormattedDate, FormattedMessage, injectIntl,
+} from '@edx/frontend-platform/i18n';
 import { sendTrackEvent, sendTrackingLogEvent } from '@edx/frontend-platform/analytics';
-import { FormattedDate, FormattedMessage, injectIntl } from '@edx/frontend-platform/i18n';
-import { Button } from '@edx/paragon';
+import { Button, Icon, IconButton } from '@edx/paragon';
+import { Close } from '@edx/paragon/icons';
 import { setLocalStorage } from '../../data/localStorage';
 import { UpgradeButton } from '../upgrade-button';
 import {
@@ -12,6 +15,7 @@ import {
   FullAccessBullet,
   SupportMissionBullet,
 } from '../upsell-bullets/UpsellBullets';
+import messages from '../messages';
 
 const UpsellNoFBECardContent = () => (
   <ul className="fa-ul upgrade-notification-ul pt-0">
@@ -122,7 +126,7 @@ const ExpirationCountdown = ({
     expirationText = (
       <FormattedMessage
         id="learning.generic.upgradeNotification.expirationDays"
-        defaultMessage={`{dayCount, number} {dayCount, plural, 
+        defaultMessage={`{dayCount, number} {dayCount, plural,
           one {day}
           other {days}} left`}
         values={{
@@ -283,7 +287,9 @@ const UpgradeNotification = ({
   upsellPageName,
   userTimezone,
   verifiedMode,
+  toggleSidebar,
 }) => {
+  const intl = useIntl();
   const dateNow = Date.now();
   const timezoneFormatArgs = userTimezone ? { timeZone: userTimezone } : {};
   const correctedTime = new Date(dateNow + timeOffsetMillis);
@@ -483,8 +489,25 @@ const UpgradeNotification = ({
   return (
     <section className={classNames('upgrade-notification small', { 'card mb-4': shouldDisplayBorder })}>
       <div id="courseHome-upgradeNotification">
-        <h2 className="h5 upgrade-notification-header" id="outline-sidebar-upgrade-header">
+        <h2
+          className={classNames('h5 upgrade-notification-header', {
+            'd-flex align-items-center mr-2 ml-4 my-1.5 font-size-18': !!toggleSidebar,
+          })}
+          id="outline-sidebar-upgrade-header"
+        >
           {upgradeNotificationHeaderText}
+          {!!toggleSidebar && (
+            <div className="d-inline-flex ml-auto">
+              <IconButton
+                src={Close}
+                size="sm"
+                iconAs={Icon}
+                onClick={toggleSidebar}
+                className="icon-hover"
+                alt={intl.formatMessage(messages.close)}
+              />
+            </div>
+          )}
         </h2>
         {expirationBanner}
         <div className="upgrade-notification-message">
@@ -512,6 +535,7 @@ UpgradeNotification.propTypes = {
     percentage: PropTypes.number,
     code: PropTypes.string,
   }),
+  toggleSidebar: PropTypes.func,
   shouldDisplayBorder: PropTypes.bool,
   setupgradeNotificationCurrentState: PropTypes.func,
   timeOffsetMillis: PropTypes.number,
@@ -534,6 +558,7 @@ UpgradeNotification.defaultProps = {
   timeOffsetMillis: 0,
   userTimezone: null,
   verifiedMode: null,
+  toggleSidebar: null,
 };
 
 export default injectIntl(UpgradeNotification);
diff --git a/src/generic/upgrade-notification/UpgradeNotification.scss b/src/generic/upgrade-notification/UpgradeNotification.scss
index 85d3509b..afb93b42 100644
--- a/src/generic/upgrade-notification/UpgradeNotification.scss
+++ b/src/generic/upgrade-notification/UpgradeNotification.scss
@@ -41,3 +41,7 @@
   padding-top: .75rem;
   padding-bottom: .75rem;
 }
+
+.font-size-18 {
+  font-size: 18px !important;
+}
diff --git a/src/index.jsx b/src/index.jsx
index d99be587..7f2af36f 100755
--- a/src/index.jsx
+++ b/src/index.jsx
@@ -154,6 +154,7 @@ initialize({
         DISCUSSIONS_MFE_BASE_URL: process.env.DISCUSSIONS_MFE_BASE_URL || null,
         ENTERPRISE_LEARNER_PORTAL_HOSTNAME: process.env.ENTERPRISE_LEARNER_PORTAL_HOSTNAME || null,
         ENABLE_JUMPNAV: process.env.ENABLE_JUMPNAV || null,
+        ENABLE_NEW_SIDEBAR: process.env.ENABLE_NEW_SIDEBAR || null,
         ENABLE_NOTICES: process.env.ENABLE_NOTICES || null,
         INSIGHTS_BASE_URL: process.env.INSIGHTS_BASE_URL || null,
         SEARCH_CATALOG_URL: process.env.SEARCH_CATALOG_URL || null,
diff --git a/src/index.scss b/src/index.scss
index 47efe45b..71ab2e02 100755
--- a/src/index.scss
+++ b/src/index.scss
@@ -361,6 +361,13 @@
   box-shadow: 0 .0625rem .125rem rgba(0, 0, 0, .2) !important;
 }
 
+.icon-hover {
+  &:hover {
+    color: $primary-500 !important;
+    background-color: $light-300 !important;
+  }
+}
+
 // Import component-specific sass files
 @import "courseware/course/celebration/CelebrationModal.scss";
 @import "courseware/course/sidebar/sidebars/notifications/NotificationIcon.scss";