It didn't work for me at all under KitKat either. Now I'm having issues with reading playlists from music. Plugged into the USB my car recognizes the phone fine, and will play all songs but it will not let me view playlists. I've had iphone's and Windows phones and both of those synced with my car flawlessly. I'm not sure what the deal is with Android and cars. If you search it you'll see this is a common issue. Borderline deal-breaker for me.