This harness is for use with the PIE X3 triple input.
- Must use PIE X3 Auxiliary Input Selector with this harness
- The CD changer port beind the radio must have the tri color port. Will not work if you have the solid one part connector behind your radio. See this video for the difference.
- The AA3-HAR will not make this part work with your audi if you have the solid one part conector./.