Active Soundsystem for Audi A4 B9 with APP control
After retrofitting, the engine sound of your Audi A4 B9 can be easily adjusted via app control or original installed switches.
The complete set is compatible with the following Audi A4 B9 models:- All TDI vehicles
- All petrol engines are also possible
Do you have any questions about the Active Sound retrofit? Then please write to us.
