The Axxess AXVI-9004 is a vehicle-specific CAN bus interface designed for select 2002–2013 Audi vehicles. This interface allows the installation of an aftermarket radio while retaining important factory features such as retained accessory power (R.A.P.), factory amplifier functionality, balance and fade controls, and navigation outputs. Compatible with both amplified and non-amplified systems, the AXVI-9004 simplifies aftermarket radio integration while maintaining OEM functionality and reducing installation complexity. Its pre-wired steering wheel control harness and Micro-B USB update capability make it an ideal solution for modern Audi radio upgrades. Features & Highlights Designed for select 2002–2013 Audi vehicles Retains retained accessory power (R.A.P.) Provides 12V accessory output (10-amp) Retains balance and fade controls Compatible with amplified and non-amplified systems Provides navigation outputs: Parking brake Reverse trigger Vehicle speed sense (VSS) Pre-wired AXSWC steering wheel control harness High-level speaker input compatible Micro-B USB updatable for firmware updates Plug-and-play installation design Compatible with aftermarket multimedia and navigation radios Specifications Specification Details Product Type CAN Bus Radio Interface Manufacturer Axxess / Metra Electronics Model Number AXVI-9004 Vehicle Compatibility Select Audi Vehicles Vehicle Years 2002–2013 Amplified System Compatible Yes Non-Amplified Compatible Yes Accessory Output 12V / 10A Steering Wheel Control Ready Yes (AXSWC sold separately) Navigation Outputs Reverse, Parking Brake, VSS Speaker Input Type High-Level Firmware Updatable Yes (Micro-B USB) Installation Style Plug-and-Play Interface Harness Compatible Vehicle Applications Audi A3 (2006–2013) Audi A4 / S4 / RS4 (2002–2008) Audi A6 (2004) Audi Allroad (2004–2005) Audi TT (2002–2013)