Had a hell of a time trying to install it into an Audi but all works and works very well! More than what I was looking for in a remote start alarm but really nice to have the extra features though-5 onboard relays aint bad either. The automatic lock/unlock with ignition is really convenient. Great alarm for a really good price. My only recommendation is to not use the old school 556u bypass-will save you hours of pain trust me!