CT53-AU04 - Active System adaptor ISO for Bose Systems Audi A2, A3, A4, TT MK1

Audi Active System Adaptor ISO with level adjustment for BOSE Amplified Systems

Used when changing audio system on Audi A2, A3, A4 and TT MK1
Compatible with ISO connections and Bose amplified systems only - these generally have a Bose logo on the front door speakers. Please note that some owners may have added the Bose logo to give the impression that the vehicle has the extra Bose amplifier - check stereo wiring. If there is no middle 8 pin ISO speaker plug the system is Bose.
Interface has adjustment controls to balance audio levels between front and rear speakers
Prevents stereo thump and alternator whine when changing stereo
Models after 2001 are generally CAN bus based and will require a connection to be made to the fuse box when installing the kit.

IMPORTANT !!
Vehicles built in 2006 / 2007 - you MUST remove stereo to check if it uses ISO connectors. On these years it can either be ISO or Quadlock.
If you have the RNS-E Navigation unit this part is NOT compatible.
This part is NOT compatible with Quadlock connectors

Vehicle Compatibility
Audi A2 For Vehicles With BOSE Fully Amplified System 1999 to 2005 Mini ISO
Audi A3 For Vehicles With BOSE Fully Amplified System 1996 to 2005 Mini ISO
Audi A4 For Vehicles With BOSE Fully Amplified System 1995 to 2005 Mini ISO
Audi TT For Vehicles With BOSE Fully Amplified System 1998 to 2006 Mini ISO