diff --git a/automotive/vehicle/aidl/aidl_test/Android.bp b/automotive/vehicle/aidl/aidl_test/Android.bp
index ea6a710..f517df8 100644
--- a/automotive/vehicle/aidl/aidl_test/Android.bp
+++ b/automotive/vehicle/aidl/aidl_test/Android.bp
@@ -40,7 +40,7 @@
 cc_test {
     name: "VehiclePropertyAnnotationCppTest",
     srcs: ["VehiclePropertyAnnotationCppTest.cpp"],
-    header_libs: ["IVehicleGeneratedHeaders"],
+    header_libs: ["IVehicleGeneratedHeaders-V3"],
     defaults: ["VehicleHalInterfaceDefaults"],
     test_suites: ["general-tests"],
 }
diff --git a/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json b/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
index 0dea16b..de0e398 100644
--- a/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
+++ b/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
@@ -521,7 +521,7 @@
             {
                 "name": "PER_DISPLAY_BRIGHTNESS",
                 "value": 289475076,
-                "description": "Property to represent brightness of the displays which are controlled separately.\nSome cars have one or more displays whose brightness is controlled separately and this property is to inform the brightness of each passenger display. In cars where all displays' brightness is controlled together, they must use DISPLAY_BRIGHTNESS.\nOnly one of DISPLAY_BRIGHTNESS and PER_DISPLAY_BRIGHTNESS should be implemented. If both are available, PER_DISPLAY_BRIGHTNESS is used by AAOS.\nThe display port uniquely identifies a physical connector on the device for display output, ranging from 0 to 255.\nWriting this property must cause an on property change event that contains the same [display port, brightness] tuple even if the new display brightness is the same as the current value.\nTo get the display brightness for a specific display port, the GetValueRequest must contain a VehiclePropValue, which contains one int32Value: displayPort. Getting this property without specifying the the display port is undefined behavior.\nint32Values[0] : display port int32Values[1] : brightness"
+                "description": "Property to represent brightness of the displays which are controlled separately.\nSome cars have one or more displays whose brightness is controlled separately and this property is to inform the brightness of each passenger display. In cars where all displays' brightness is controlled together, they must use DISPLAY_BRIGHTNESS.\nOnly one of DISPLAY_BRIGHTNESS and PER_DISPLAY_BRIGHTNESS should be implemented. If both are available, PER_DISPLAY_BRIGHTNESS is used by AAOS.\nIf this is supported, PER_DISPLAY_MAX_BRIGHTNESS must be supported to represent the max display brightness for each display. Otherwise, the max display brightness is by default 1. The VehicleAreaConfig.maxInt32Value must not be used to represent max display brightness, because maxInt32Value is defined to be the max value for all the elements inside the integer value, which includes display port and brightness. So it is not meaningful.\nThe display port uniquely identifies a physical connector on the device for display output, ranging from 0 to 255.\nWriting this property must cause an on property change event that contains the same [display port, brightness] tuple even if the new display brightness is the same as the current value.\nTo get the display brightness for a specific display port, the GetValueRequest must contain a VehiclePropValue, which contains one int32Value: displayPort. Getting this property without specifying the the display port is undefined behavior.\nint32Values[0] : display port int32Values[1] : brightness"
             },
             {
                 "name": "Valet mode enabled",
@@ -1364,6 +1364,11 @@
                 "description": "Reports current state of CarEvsService types.\nInforms other components of current state of each CarEvsService service type with values defined in CameraServiceState. CarEvsService will update this property whenever a service type transitions into a new state.\nint32[0]: Current state of REARVIEW service type. int32[1]: Current state of SURROUNDVIEW service type. int32[2]: Current state of FRONTVIEW service type. int32[3]: Current state of LEFTVIEW service type. int32[4]: Current state of RIGHTVIEW service type. int32[5]: Current state of DRIVERVIEW service type. int32[6]: Current state of FRONT_PASSENGERVIEW service type. int32[7]: Current state of REAR_PASSENGERVIEW service type."
             },
             {
+                "name": "PER_DISPLAY_MAX_BRIGHTNESS",
+                "value": 289476430,
+                "description": "Property to represent max brightness of the displays which are controlled separately.\nThis is only used if PER_DISPLAY_BRIGHTNESS is supported.\nThe display port uniquely identifies a physical connector on the device for display output, ranging from 0 to 255.\nint32Values[0] : display port number int32Values[1] : max brightness for display port number specified at int32Values[0] int32Values[2] : display port number int32Values[3] : max brightness for display port number specified at int32Values[2] ..."
+            },
+            {
                 "name": "AUTOMATIC_EMERGENCY_BRAKING_ENABLED",
                 "value": 287313920,
                 "description": "Enable or disable Automatic Emergency Braking (AEB).\nSet true to enable AEB and false to disable AEB. When AEB is enabled, the ADAS system in the vehicle should be turned on and monitoring to avoid potential collisions. This property should apply for higher speed applications only. For enabling low speed automatic emergency braking, LOW_SPEED_AUTOMATIC_EMERGENCY_BRAKING_ENABLED should be used.\nIn general, AUTOMATIC_EMERGENCY_BRAKING_ENABLED should always return true or false. If the feature is not available due to some temporary state, such as the vehicle speed being too low, that information must be conveyed through the ErrorState values in the AUTOMATIC_EMERGENCY_BRAKING_STATE property.\nThis property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to implement it as VehiclePropertyAccess.READ only."
diff --git a/automotive/vehicle/aidl/generated_lib/4/cpp/AccessForVehicleProperty.h b/automotive/vehicle/aidl/generated_lib/4/cpp/AccessForVehicleProperty.h
index 51a3025..6d07fe5 100644
--- a/automotive/vehicle/aidl/generated_lib/4/cpp/AccessForVehicleProperty.h
+++ b/automotive/vehicle/aidl/generated_lib/4/cpp/AccessForVehicleProperty.h
@@ -263,6 +263,7 @@
         {VehicleProperty::CLUSTER_HEARTBEAT, VehiclePropertyAccess::WRITE},
         {VehicleProperty::VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL, VehiclePropertyAccess::READ},
         {VehicleProperty::CAMERA_SERVICE_CURRENT_STATE, VehiclePropertyAccess::WRITE},
+        {VehicleProperty::PER_DISPLAY_MAX_BRIGHTNESS, VehiclePropertyAccess::READ},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_ENABLED, VehiclePropertyAccess::READ_WRITE},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_STATE, VehiclePropertyAccess::READ},
         {VehicleProperty::FORWARD_COLLISION_WARNING_ENABLED, VehiclePropertyAccess::READ_WRITE},
diff --git a/automotive/vehicle/aidl/generated_lib/4/cpp/ChangeModeForVehicleProperty.h b/automotive/vehicle/aidl/generated_lib/4/cpp/ChangeModeForVehicleProperty.h
index 60e9a72..5ecee95 100644
--- a/automotive/vehicle/aidl/generated_lib/4/cpp/ChangeModeForVehicleProperty.h
+++ b/automotive/vehicle/aidl/generated_lib/4/cpp/ChangeModeForVehicleProperty.h
@@ -263,6 +263,7 @@
         {VehicleProperty::CLUSTER_HEARTBEAT, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::CAMERA_SERVICE_CURRENT_STATE, VehiclePropertyChangeMode::ON_CHANGE},
+        {VehicleProperty::PER_DISPLAY_MAX_BRIGHTNESS, VehiclePropertyChangeMode::STATIC},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_ENABLED, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_STATE, VehiclePropertyChangeMode::ON_CHANGE},
         {VehicleProperty::FORWARD_COLLISION_WARNING_ENABLED, VehiclePropertyChangeMode::ON_CHANGE},
diff --git a/automotive/vehicle/aidl/generated_lib/4/cpp/VersionForVehicleProperty.h b/automotive/vehicle/aidl/generated_lib/4/cpp/VersionForVehicleProperty.h
index 0e80bd8..8b9c1bd 100644
--- a/automotive/vehicle/aidl/generated_lib/4/cpp/VersionForVehicleProperty.h
+++ b/automotive/vehicle/aidl/generated_lib/4/cpp/VersionForVehicleProperty.h
@@ -262,6 +262,7 @@
         {VehicleProperty::CLUSTER_HEARTBEAT, 3},
         {VehicleProperty::VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL, 3},
         {VehicleProperty::CAMERA_SERVICE_CURRENT_STATE, 3},
+        {VehicleProperty::PER_DISPLAY_MAX_BRIGHTNESS, 3},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_ENABLED, 2},
         {VehicleProperty::AUTOMATIC_EMERGENCY_BRAKING_STATE, 2},
         {VehicleProperty::FORWARD_COLLISION_WARNING_ENABLED, 2},
diff --git a/automotive/vehicle/aidl/generated_lib/4/java/AccessForVehicleProperty.java b/automotive/vehicle/aidl/generated_lib/4/java/AccessForVehicleProperty.java
index afb6cab..e9f35a5 100644
--- a/automotive/vehicle/aidl/generated_lib/4/java/AccessForVehicleProperty.java
+++ b/automotive/vehicle/aidl/generated_lib/4/java/AccessForVehicleProperty.java
@@ -256,6 +256,7 @@
         Map.entry(VehicleProperty.CLUSTER_HEARTBEAT, VehiclePropertyAccess.WRITE),
         Map.entry(VehicleProperty.VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL, VehiclePropertyAccess.READ),
         Map.entry(VehicleProperty.CAMERA_SERVICE_CURRENT_STATE, VehiclePropertyAccess.WRITE),
+        Map.entry(VehicleProperty.PER_DISPLAY_MAX_BRIGHTNESS, VehiclePropertyAccess.READ),
         Map.entry(VehicleProperty.AUTOMATIC_EMERGENCY_BRAKING_ENABLED, VehiclePropertyAccess.READ_WRITE),
         Map.entry(VehicleProperty.AUTOMATIC_EMERGENCY_BRAKING_STATE, VehiclePropertyAccess.READ),
         Map.entry(VehicleProperty.FORWARD_COLLISION_WARNING_ENABLED, VehiclePropertyAccess.READ_WRITE),
diff --git a/automotive/vehicle/aidl/generated_lib/4/java/ChangeModeForVehicleProperty.java b/automotive/vehicle/aidl/generated_lib/4/java/ChangeModeForVehicleProperty.java
index 12aff40..3fb52b7 100644
--- a/automotive/vehicle/aidl/generated_lib/4/java/ChangeModeForVehicleProperty.java
+++ b/automotive/vehicle/aidl/generated_lib/4/java/ChangeModeForVehicleProperty.java
@@ -256,6 +256,7 @@
         Map.entry(VehicleProperty.CLUSTER_HEARTBEAT, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.CAMERA_SERVICE_CURRENT_STATE, VehiclePropertyChangeMode.ON_CHANGE),
+        Map.entry(VehicleProperty.PER_DISPLAY_MAX_BRIGHTNESS, VehiclePropertyChangeMode.STATIC),
         Map.entry(VehicleProperty.AUTOMATIC_EMERGENCY_BRAKING_ENABLED, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.AUTOMATIC_EMERGENCY_BRAKING_STATE, VehiclePropertyChangeMode.ON_CHANGE),
         Map.entry(VehicleProperty.FORWARD_COLLISION_WARNING_ENABLED, VehiclePropertyChangeMode.ON_CHANGE),
diff --git a/automotive/vehicle/aidl_property/Android.bp b/automotive/vehicle/aidl_property/Android.bp
index 2aaf6b6..b8a978b 100644
--- a/automotive/vehicle/aidl_property/Android.bp
+++ b/automotive/vehicle/aidl_property/Android.bp
@@ -28,7 +28,7 @@
         // This HAL was originally part of android.hardware.automotive.vehicle
         "android/hardware/automotive/vehicle/*.aidl",
     ],
-    frozen: true,
+    frozen: false,
     stability: "vintf",
     backend: {
         cpp: {
diff --git a/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
index be8d3ac..4c5dad2 100644
--- a/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/aidl_api/android.hardware.automotive.vehicle.property/current/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -262,6 +262,7 @@
   CLUSTER_HEARTBEAT = (((0x0F4B + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.MIXED) /* 299896651 */,
   VEHICLE_DRIVING_AUTOMATION_CURRENT_LEVEL = (((0x0F4C + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32) /* 289410892 */,
   CAMERA_SERVICE_CURRENT_STATE = (((0x0F4D + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32_VEC) /* 289476429 */,
+  PER_DISPLAY_MAX_BRIGHTNESS = (((0x0F4E + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32_VEC) /* 289476430 */,
   AUTOMATIC_EMERGENCY_BRAKING_ENABLED = (((0x1000 + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.BOOLEAN) /* 287313920 */,
   AUTOMATIC_EMERGENCY_BRAKING_STATE = (((0x1001 + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.INT32) /* 289411073 */,
   FORWARD_COLLISION_WARNING_ENABLED = (((0x1002 + android.hardware.automotive.vehicle.VehiclePropertyGroup.SYSTEM) + android.hardware.automotive.vehicle.VehicleArea.GLOBAL) + android.hardware.automotive.vehicle.VehiclePropertyType.BOOLEAN) /* 287313922 */,
diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
index e54c179..0863adf 100644
--- a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -1757,6 +1757,12 @@
      * implemented. If both are available, PER_DISPLAY_BRIGHTNESS is used by
      * AAOS.
      *
+     * If this is supported, PER_DISPLAY_MAX_BRIGHTNESS must be supported to represent the max
+     * display brightness for each display. Otherwise, the max display brightness is by default 1.
+     * The VehicleAreaConfig.maxInt32Value must not be used to represent max display brightness,
+     * because maxInt32Value is defined to be the max value for all the elements inside the integer
+     * value, which includes display port and brightness. So it is not meaningful.
+     *
      * The display port uniquely identifies a physical connector on the device
      * for display output, ranging from 0 to 255.
      *
@@ -5214,6 +5220,27 @@
     CAMERA_SERVICE_CURRENT_STATE = 0x0F4D + VehiclePropertyGroup.SYSTEM + VehicleArea.GLOBAL
             + VehiclePropertyType.INT32_VEC,
 
+    /**
+     * Property to represent max brightness of the displays which are controlled separately.
+     *
+     * This is only used if PER_DISPLAY_BRIGHTNESS is supported.
+     *
+     * The display port uniquely identifies a physical connector on the device
+     * for display output, ranging from 0 to 255.
+     *
+     * int32Values[0] : display port number
+     * int32Values[1] : max brightness for display port number specified at int32Values[0]
+     * int32Values[2] : display port number
+     * int32Values[3] : max brightness for display port number specified at int32Values[2]
+     * ...
+     *
+     * @change_mode VehiclePropertyChangeMode.STATIC
+     * @access VehiclePropertyAccess.READ
+     * @version 3
+     */
+    PER_DISPLAY_MAX_BRIGHTNESS = 0x0F4E + VehiclePropertyGroup.SYSTEM + VehicleArea.GLOBAL
+            + VehiclePropertyType.INT32_VEC,
+
     /***********************************************************************************************
      * Start of ADAS Properties
      *
diff --git a/compatibility_matrices/compatibility_matrix.202504.xml b/compatibility_matrices/compatibility_matrix.202504.xml
index 1f51d07..0e714a4 100644
--- a/compatibility_matrices/compatibility_matrix.202504.xml
+++ b/compatibility_matrices/compatibility_matrix.202504.xml
@@ -84,7 +84,7 @@
     </hal>
     <hal format="aidl">
         <name>android.hardware.automotive.vehicle</name>
-        <version>1-3</version>
+        <version>1-4</version>
         <interface>
             <name>IVehicle</name>
             <instance>default</instance>