Aerpro CHAD3C Steering Wheel Control Harness for Audi A3, A4 & TT

by Aerpro

This Aerpro control harness allows you to upgrade to an aftermarket head unit whilst maintaining use of your factory steering wheel controls.

Steering controls are considered a primary harness and will require a secondary harness and patch lead to be used in conjunction for plug and play.


  • Plug and play
  • Retains the factory Steering wheel controls
  • Specs:
  • Phone button compatibility: Yes
  • Patch lead: Type C
  • Notes: RCA Connections
  • For BOSE & Half Amplified Systems New Radio Must Have RCA Audio Out Connectors, Blue wire must be connected to turn on factory amplifier.
  • Outputs Reverse (Purple/Violet): Yes
  • Handbrake (Light Green): Yes
  • VSS (Pink): Yes
  • Digitally amplified TTs may require VAG programming.

Vehicles known to work with this product:

  • Audi A4 2001-2008 (B6, B7)
  • Audi TT 2007 - 2014 (8J)
  • Audi A3 2003-2007 (8P)
  • Audi A3 2006-2012 (8P)