Decoder chip for Audi Q7 4L with heated steering wheel.
Have a newer generation steering wheel and the multfunction buttons will not work with your older model car?
This decoder chip is to be attached to your linbus, 12v and ground cables to the wiring harness on your airbag or button harness.
The decoder chip decodes the newer style linbus signals from the steering wheel and sends the older style linbus signals to the car, ensuring the multifunction buttons operate normally.