2005-Up Audi Radio Replacement Interface

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Product Features:

  • 2005-up Audi Radio Replacement Interface
  • The C2R-AUDI allows you to replace the factory radio in 2005-20010 Audi select vehicles
  • Retain factory steering wheel controls with the PAC SWI-RC Steering Wheel Control Interface
  • Keeps Data-Bus intact for vehicle services and emissions testing
  • Retains factory-installed BOSE or Symphone audio system
  • PAC C2R-VW2 includes:
    • Data controlled RAP accessory output wire
    • Data controlled parking brake wire
    • Data controlled reverse trigger wire
    • Data controlled vehicle speed sense wire
    • Data controlled illumination output wire
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Compatibility List:

  • Audi
    • 2008-2010 A3
    • 2005-2008 A4/S4
    • 2008-2010 TT

Harness Features

Vehicle Sound System
This refers to what kind of sound system the vehicle has. Premium audio systems are generally name brand systems (such as JBL, Bose, Rockford Fosgate, etc) that have been installed inside a vehicle when it leaves the factory. Often they more advanced systems, complex wiring, factory amplifiers, and other features that can make installing aftermarket component difficult.
Premium Sound
Main Harness Function
Different installations on different vehicles require different harnesses. This type is what the harness is considered. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo, and more.
Connect/Install an Aftermarket Car Stereo
Additional Harness Features
The various features that the wiring harness provides to your car stereo and/or audio system.
Chime Retention
Retains Steering Wheel Controls
Compatible Vehicle Make
Allows you to view only items that are compatible with your vehicle's make. Does not guarantee that it will work with your vehicle year or model.
Compatible Vehicle Make and Model
The model of vehicle that this vehicle specific product is designed for. Please keep in mind that engine variations can affect the compatibility of the products.
Audi A3
Audi A4
Audi TT

Premium Harness Features

CAN-BUS Compatible
CANBUS Ballasts ensure compatibility with ALL vehicle makes and models without the need for additional accessories. In addition, they have built-in Anti-Flickering Capacitors to help prevent lighting issues caused by voltage spikes and drops by stabilizing the power.
Chime Retention
This means that the harness is able to retain the vehicles chimes.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

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Average Attribution Rating

Browse 1 question and 1 answer
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Why did you choose this?
Sonic Electronix Store
Well I chose it as I want to replace the factory head unit in my 2006 Audi A3 with Bose sound system the head unit has died and is so called unrepairable
I went to Sonic as I always do and started searching
Found this hope it works the head unit I wanted to buy is out of stock bummer but sonic will let me know when its back in stock cant argue with that
orville d on Jan 30, 2015

Product Summary


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Internal Product ID


Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: PAC C2R-AUDI

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2005-Up Audi Radio Replacement Interface


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