ISO adapter harness for fitting a new stereo in an Audi A4, A4 Cabriolet, A6 or A8 with an original RND-D (Navigation Plus) radio with BOSE amplified audio system.

Also suitable for Audi TT built before November 2001 with BOSE amplified audio system.

This harness adapts from the original ISO and Mini ISO connectors at the back of the head unit to standard aftermarket ISO connectors. The harness has a built in high to low level audio adapter to drop the speaker outputs from the new head unit to a low line level signal to work with the original amplifier in the car. The high to low level adapter has 4 dials to individually set the levels of each audio channel to give perfect sound quality.

Loose wires for connecting the cars ignition and illumination supply are provided

Fitting instructions are included for the amplifier adjustment. 

Harness Adaptors

Connect the head unit to the original radio connector without the need to cut any of the existing wiring.

TECHNICAL NOTE

• CAR AUDIO FITTING ACCESSORIES ARE SOLD WITH LIMITED INSTRUCTIONS. 
• SOME KNOWLEDGE OF CAR AUDIO INSTALLATION IS HELPFUL IN CASE A MODIFICATION IN SOME RARE CASES MAY BE NECESSARY OR NEEDED.

If in doubt please email us with your vehicle details and we will confirm what you require.

Please make sure that is the correct Wiring Harness for your car by firstly checking to see if your make, model and year of car is listed in the description. Secondly by checking to see if the Shape in the picture listed is the same as you have in your vehicle. We try to provide upto date information as possible. If you are unsure please contact our Customer Service and we will be happy to help you.