diff --git a/docs/reference/api/Makefile.am b/docs/reference/api/Makefile.am
index ab474ea6..a641eadf 100644
--- a/docs/reference/api/Makefile.am
+++ b/docs/reference/api/Makefile.am
@@ -75,6 +75,7 @@ expand_content_files = \
 	$(top_builddir)/libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml \
 	$(top_builddir)/libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Simple.xml \
 	$(top_builddir)/libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Signal.xml \
+	$(top_builddir)/libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Sar.xml \
 	$(NULL)
 
 extra_files = \
diff --git a/docs/reference/api/ModemManager-dbus-reference.xml b/docs/reference/api/ModemManager-dbus-reference.xml
index 6685fd55..6d9ef43f 100644
--- a/docs/reference/api/ModemManager-dbus-reference.xml
+++ b/docs/reference/api/ModemManager-dbus-reference.xml
@@ -138,6 +138,7 @@
     <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Time.xml"/>
     <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Voice.xml"/>
     <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Firmware.xml"/>
+    <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Sar.xml"/>
     <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Signal.xml"/>
     <xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Oma.xml"/>
     <!--xi:include href="../../../../libmm-glib/generated/mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Contacts.xml"/-->
diff --git a/docs/reference/libmm-glib/libmm-glib-docs.xml b/docs/reference/libmm-glib/libmm-glib-docs.xml
index c0495e44..92e105f0 100644
--- a/docs/reference/libmm-glib/libmm-glib-docs.xml
+++ b/docs/reference/libmm-glib/libmm-glib-docs.xml
@@ -238,6 +238,10 @@
     <xi:include href="xml/MmGdbusModemVoiceProxy.xml"/>
     <xi:include href="xml/MmGdbusModemVoiceSkeleton.xml"/>
 
+    <xi:include href="xml/MmGdbusModemSar.xml"/>
+    <xi:include href="xml/MmGdbusModemSarProxy.xml"/>
+    <xi:include href="xml/MmGdbusModemSarSkeleton.xml"/>
+
     <!--xi:include href="xml/MmGdbusModemContacts.xml"/>
     <xi:include href="xml/MmGdbusModemContactsProxy.xml"/>
     <xi:include href="xml/MmGdbusModemContactsSkeleton.xml"/-->
diff --git a/docs/reference/libmm-glib/libmm-glib-sections.txt b/docs/reference/libmm-glib/libmm-glib-sections.txt
index 2d0b38e4..1b7fc52a 100644
--- a/docs/reference/libmm-glib/libmm-glib-sections.txt
+++ b/docs/reference/libmm-glib/libmm-glib-sections.txt
@@ -3226,6 +3226,77 @@ MmGdbusModemVoiceSkeletonPrivate
 mm_gdbus_modem_voice_skeleton_get_type
 </SECTION>
 
+<SECTION>
+<FILE>MmGdbusModemSar</FILE>
+<TITLE>MmGdbusModemSar</TITLE>
+MmGdbusModemSar
+MmGdbusModemSarIface
+<SUBSECTION Getters>
+mm_gdbus_modem_sar_get_power_level
+mm_gdbus_modem_sar_get_state
+<SUBSECTION Methods>
+mm_gdbus_modem_sar_call_enable
+mm_gdbus_modem_sar_call_enable_finish
+mm_gdbus_modem_sar_call_enable_sync
+mm_gdbus_modem_sar_call_set_power_level
+mm_gdbus_modem_sar_call_set_power_level_finish
+mm_gdbus_modem_sar_call_set_power_level_sync
+<SUBSECTION Private>
+mm_gdbus_modem_sar_set_power_level
+mm_gdbus_modem_sar_set_state
+mm_gdbus_modem_sar_interface_info
+mm_gdbus_modem_sar_override_properties
+mm_gdbus_modem_sar_complete_enable
+mm_gdbus_modem_sar_complete_set_power_level
+<SUBSECTION Standard>
+MM_GDBUS_IS_MODEM_SAR
+MM_GDBUS_MODEM_SAR
+MM_GDBUS_MODEM_SAR_GET_IFACE
+MM_GDBUS_TYPE_MODEM_SAR
+mm_gdbus_modem_sar_get_type
+</SECTION>
+
+<SECTION>
+<FILE>MmGdbusModemSarProxy</FILE>
+<TITLE>MmGdbusModemSarProxy</TITLE>
+MmGdbusModemSarProxy
+<SUBSECTION New>
+mm_gdbus_modem_sar_proxy_new
+mm_gdbus_modem_sar_proxy_new_finish
+mm_gdbus_modem_sar_proxy_new_for_bus
+mm_gdbus_modem_sar_proxy_new_for_bus_finish
+mm_gdbus_modem_sar_proxy_new_for_bus_sync
+mm_gdbus_modem_sar_proxy_new_sync
+<SUBSECTION Standard>
+MmGdbusModemSarProxyClass
+MM_GDBUS_IS_MODEM_SAR_PROXY
+MM_GDBUS_IS_MODEM_SAR_PROXY_CLASS
+MM_GDBUS_MODEM_SAR_PROXY
+MM_GDBUS_MODEM_SAR_PROXY_CLASS
+MM_GDBUS_MODEM_SAR_PROXY_GET_CLASS
+MM_GDBUS_TYPE_MODEM_SAR_PROXY
+MmGdbusModemSarProxyPrivate
+mm_gdbus_modem_sar_proxy_get_type
+</SECTION>
+
+<SECTION>
+<FILE>MmGdbusModemSarSkeleton</FILE>
+<TITLE>MmGdbusModemSarSkeleton</TITLE>
+MmGdbusModemSarSkeleton
+<SUBSECTION New>
+mm_gdbus_modem_sar_skeleton_new
+<SUBSECTION Standard>
+MmGdbusModemSarSkeletonClass
+MM_GDBUS_IS_MODEM_SAR_SKELETON
+MM_GDBUS_IS_MODEM_SAR_SKELETON_CLASS
+MM_GDBUS_MODEM_SAR_SKELETON
+MM_GDBUS_MODEM_SAR_SKELETON_CLASS
+MM_GDBUS_MODEM_SAR_SKELETON_GET_CLASS
+MM_GDBUS_TYPE_MODEM_SAR_SKELETON
+MmGdbusModemSarSkeletonPrivate
+mm_gdbus_modem_sar_skeleton_get_type
+</SECTION>
+
 <SECTION>
 <FILE>MmGdbusObject</FILE>
 <TITLE>MmGdbusObject</TITLE>
@@ -3258,6 +3329,8 @@ mm_gdbus_object_peek_modem_signal
 mm_gdbus_object_get_modem_signal
 mm_gdbus_object_peek_modem_voice
 mm_gdbus_object_get_modem_voice
+mm_gdbus_object_peek_modem_sar
+mm_gdbus_object_get_modem_sar
 <SUBSECTION Methods>
 <SUBSECTION Private>
 <SUBSECTION Standard>
@@ -3306,6 +3379,7 @@ mm_gdbus_object_skeleton_set_modem_simple
 mm_gdbus_object_skeleton_set_modem_time
 mm_gdbus_object_skeleton_set_modem_signal
 mm_gdbus_object_skeleton_set_modem_voice
+mm_gdbus_object_skeleton_set_modem_sar
 <SUBSECTION Standard>
 MmGdbusObjectSkeletonClass
 MM_GDBUS_IS_OBJECT_SKELETON
diff --git a/introspection/Makefile.am b/introspection/Makefile.am
index fccf3b8f..c7515773 100644
--- a/introspection/Makefile.am
+++ b/introspection/Makefile.am
@@ -21,6 +21,7 @@ xml_DATA = \
 	org.freedesktop.ModemManager1.Modem.Time.xml \
 	org.freedesktop.ModemManager1.Modem.Voice.xml \
 	org.freedesktop.ModemManager1.Call.xml \
+	org.freedesktop.ModemManager1.Modem.Sar.xml \
 	org.freedesktop.ModemManager1.Modem.Modem3gpp.ProfileManager.xml \
 	$(NULL)
 
diff --git a/introspection/all.xml b/introspection/all.xml
index fabf2dd9..dda64dd5 100644
--- a/introspection/all.xml
+++ b/introspection/all.xml
@@ -17,6 +17,7 @@
   <xi:include href="org.freedesktop.ModemManager1.Modem.Location.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Time.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Firmware.xml"/>
+  <xi:include href="org.freedesktop.ModemManager1.Modem.Sar.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Signal.xml"/>
   <xi:include href="org.freedesktop.ModemManager1.Modem.Oma.xml"/>
 
diff --git a/introspection/org.freedesktop.ModemManager1.Modem.Sar.xml b/introspection/org.freedesktop.ModemManager1.Modem.Sar.xml
new file mode 100644
index 00000000..773cd571
--- /dev/null
+++ b/introspection/org.freedesktop.ModemManager1.Modem.Sar.xml
@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<!--
+ ModemManager 1.0 Interface Specification
+
+   Copyright (C) 2020 Google, Inc.
+-->
+
+<node name="/" xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
+
+  <!--
+      org.freedesktop.ModemManager1.Modem.Sar:
+      @short_description: The ModemManager dynamic SAR interface.
+
+      The SAR interface defines operations and properties for dynamic SAR, so
+      that user applications can control the output power level dynamically.
+
+      Using the SAR interface is not trivial, and it requires prior knowledge of
+      the internal SAR mapping table configured in each device.
+
+      The SAR mapping table is defined by the manufacturer of the device, and is
+      usually setup to match a specific hardware setup (e.g. a specific laptop or
+      hardware configuration). This table may provide different power levels for
+      different frequency bands and/or antennas.
+
+      An example SAR mapping table, where all bands and antennas share the same
+      level, could look like this:
+      <table>
+        <tr><td>Power Level</td><td>LTE B3</td>   <td>LTE B7</td>   <td>LTE B20</td></tr>
+        <tr><td>0</td>          <td>26.0 dBm</td> <td>26.5 dBm</td> <td>27.0 dBm</td></tr>
+        <tr><td>1</td>          <td>26.5 dBm</td> <td>27.0 dBm</td> <td>27.5 dBm</td></tr>
+        <tr><td>2</td>          <td>27.0 dBm</td> <td>27.5 dBm</td> <td>28.0 dBm</td></tr>
+        <tr><td>3</td>          <td>27.5 dBm</td> <td>28.0 dBm</td> <td>28.5 dBm</td></tr>
+        <tr><td>4</td>          <td>28.0 dBm</td> <td>28.5 dBm</td> <td>28.5 dBm</td></tr>
+        <tr><td>5</td>          <td>28.5 dBm</td> <td>28.5 dBm</td> <td>28.5 dBm</td></tr>
+      </table>
+
+      In this example, the SAR mapping table has 6 different levels (0 to 5),
+      and it's applied exclusively for LTE bands B3, B7 and B20 in all available
+      antennas. None of this information is exposed to the user in the SAR
+      interface, not even the amount of levels available.
+  -->
+  <interface name="org.freedesktop.ModemManager1.Modem.Sar">
+
+    <!--
+        Enable:
+        @enable: %TRUE to enable dynamic SAR and %FALSE to disable it.
+
+        Enable or disable dynamic SAR.
+
+        When enabled, the modem's output power level can be dynamically updated
+        by the host.
+
+        When disabled, the modem's output power level is dynamically updated
+        exclusively by the device.
+
+        Since: 1.18
+    -->
+    <method name="Enable">
+      <arg name="enable" type="b" direction="in" />
+    </method>
+
+    <!--
+        SetPowerLevel:
+        @level: Index of the SAR power level mapping table.
+
+        Set current dynamic SAR power level for all antennas on the device.
+
+        Please check with your modem vendor for detailed description on the
+        number of levels and corresponding power output for each level.
+
+        The index set here will apply to all antennas on the system.
+
+        Since: 1.18
+    -->
+    <method name="SetPowerLevel">
+      <arg name="level" type="u" direction="in" />
+    </method>
+
+    <!--
+        State:
+
+        Boolean indicating whether dynamic SAR is currently enabled.
+
+        Since: 1.18
+    -->
+    <property name="State" type="b" access="read" />
+
+    <!--
+        PowerLevel:
+
+        Current index of the SAR power level mapping table that is being used
+        for setting the output power of all antennas on the system.
+
+        This value is only applicable when dynamic SAR is enabled.
+
+        Since: 1.18
+    -->
+    <property name="PowerLevel" type="u" access="read" />
+
+  </interface>
+</node>
diff --git a/libmm-glib/generated/Makefile.am b/libmm-glib/generated/Makefile.am
index 3eff4897..5e171238 100644
--- a/libmm-glib/generated/Makefile.am
+++ b/libmm-glib/generated/Makefile.am
@@ -46,6 +46,7 @@ GENERATED_DOC = \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.ProfileManager.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml \
+	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Sar.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Simple.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Signal.xml \
 	$(NULL)
@@ -121,6 +122,7 @@ mm_gdbus_modem_generated = \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.ProfileManager.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml \
+	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Sar.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Simple.xml \
 	mm-gdbus-doc-org.freedesktop.ModemManager1.Modem.Signal.xml \
 	$(NULL)
@@ -136,6 +138,7 @@ mm_gdbus_modem_deps = \
 	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Modem3gpp.xml \
 	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Modem3gpp.ProfileManager.xml \
 	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Modem3gpp.Ussd.xml \
+	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Sar.xml \
 	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Simple.xml \
 	$(top_srcdir)/introspection/org.freedesktop.ModemManager1.Modem.Signal.xml \
 	$(NULL)