diff --git a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyAccess.aidl b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyAccess.aidl
index ec9587f60c..dde9a88fd3 100644
--- a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyAccess.aidl
+++ b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyAccess.aidl
@@ -34,8 +34,8 @@
 package android.hardware.automotive.vehicle;
 @Backing(type="int") @VintfStability
 enum VehiclePropertyAccess {
-  NONE = 0,
-  READ = 1,
-  WRITE = 2,
-  READ_WRITE = 3,
+  NONE = 0x00,
+  READ = 0x01,
+  WRITE = 0x02,
+  READ_WRITE = 0x03,
 }
diff --git a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyChangeMode.aidl b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyChangeMode.aidl
index 5455fdd5ca..2f9d107e88 100644
--- a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyChangeMode.aidl
+++ b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyChangeMode.aidl
@@ -34,7 +34,7 @@
 package android.hardware.automotive.vehicle;
 @Backing(type="int") @VintfStability
 enum VehiclePropertyChangeMode {
-  STATIC = 0,
-  ON_CHANGE = 1,
-  CONTINUOUS = 2,
+  STATIC = 0x00,
+  ON_CHANGE = 0x01,
+  CONTINUOUS = 0x02,
 }
diff --git a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyStatus.aidl b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyStatus.aidl
index 6d0e041ff6..642ce83f21 100644
--- a/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyStatus.aidl
+++ b/automotive/vehicle/aidl/aidl_api/android.hardware.automotive.vehicle/current/android/hardware/automotive/vehicle/VehiclePropertyStatus.aidl
@@ -34,7 +34,7 @@
 package android.hardware.automotive.vehicle;
 @Backing(type="int") @VintfStability
 enum VehiclePropertyStatus {
-  AVAILABLE = 0,
-  UNAVAILABLE = 1,
-  ERROR = 2,
+  AVAILABLE = 0x00,
+  UNAVAILABLE = 0x01,
+  ERROR = 0x02,
 }