diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ButtonDispatcher.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ButtonDispatcher.java
index 63f726b545db6..95cb672666fe7 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ButtonDispatcher.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ButtonDispatcher.java
@@ -176,8 +176,18 @@ public class ButtonDispatcher {
         mCurrentView = currentView.findViewById(mId);
     }
 
+    public void setCarMode(boolean carMode) {
+        final int N = mViews.size();
+        for (int i = 0; i < N; i++) {
+            final View view = mViews.get(i);
+            if (view instanceof ButtonInterface) {
+                ((ButtonInterface) view).setCarMode(carMode);
+            }
+        }
+    }
+
     /**
-     * Interface for ImageView button actions.
+     * Interface for button actions.
      */
     public interface ButtonInterface {
         void setImageResource(@DrawableRes int resId);
@@ -187,5 +197,7 @@ public class ButtonDispatcher {
         void abortCurrentGesture();
 
         void setLandscape(boolean landscape);
+
+        void setCarMode(boolean carMode);
     }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
index 23aeae8c5b332..0f4d9ed278c78 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java
@@ -624,6 +624,7 @@ public class NavigationBarView extends LinearLayout {
                 mCarMode = true;
                 uiCarModeChanged = true;
             }
+            getHomeButton().setCarMode(mCarMode);
         }
         return uiCarModeChanged;
     }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
index 3df759068ae96..61bac2d8d3c4a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
@@ -270,6 +270,11 @@ public class KeyButtonView extends ImageView implements ButtonDispatcher.ButtonI
     public void setLandscape(boolean landscape) {
         //no op
     }
+
+    @Override
+    public void setCarMode(boolean carMode) {
+        // no op
+    }
 }