Steering wheel button control adapter for Audi / Seat ACV SWC 42A-1321-006-0

steering wheel adapter for Audi A1 (8X) (07/10->04/18), A3 (8P) (05/03->04/05, 10/04->04/13), A4 B6 (8E) (11/00->10/05), A4 B7 (8E) (11/04->02/09), A6 (C5/B4) (05/01->03/06), Q3 (8U) (10/11->11/14, 02/15->06/18), R8 (42) (04/07->05/15), TT (8J) (09/06->04/10, 08/10->04/14) and Seat Exeo (3R) (03/09->05/13)
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Steering wheel button control adapter for Audi / Seat ACV SWC 42A-1321-006-0

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Steering Wheel Control Adapter for Audi / Seat ACV SWC 42A-1321-006-0

Maintain the original steering wheel radio control functions when replacing the factory radio with an aftermarket unit. Depending on the vehicle's equipment, the range of functions, and the software of the newly installed radio, some functions may be limited or replaced by others. Compare the displayed wiring connectors with the connectors in your vehicle to ensure they match both technically and visually. Check if one of the mentioned OEM radios was originally installed. Verify vehicle functionality, system settings, and proper steering wheel control (SWC) operation before final installation.

Designed for Cars

Audi A1 (8X) 07/2010 -> 04/2018 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E; vehicles with OEM Chorus radio with monochrome display.
Audi A3 (8P) 05/2003 -> 04/2005 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi A3 (8P) 10/2004 -> 04/2013 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi A4 B6 (8E) 11/2000 -> 10/2005 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi A4 B7 (8E) 11/2004 -> 02/2009 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi A6 (C5/B4) 05/2001 -> 03/2006 - vehicles with OEM navigation RNS-E.
Audi Q3 (8U) 10/2011 -> 11/2014 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E; vehicles with OEM Chorus radio with monochrome display.
Audi Q3 (8U) 02/2015 -> 06/2018 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E; vehicles with OEM Chorus radio with monochrome display.
Audi R8 (42) 04/2007 -> 05/2015 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi TT (8J) 09/2006 -> 04/2010 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.
Audi TT (8J) 08/2010 -> 04/2014 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E; if OEM amplifier is non-functional, switch coding from CAN activation to Remote (control unit J525 > Activation 1 Remote, 0xxx?xx), if possible.

Seat Exeo (3R) 03/2009 -> 05/2013 - original radio Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II 2-DIN or BNS 5.0 / RNS-E.

CAN Bus Information

Connectors and Power:

Connector: 40-pin Quadlock VAG.
OEM amplifier connection 2-channel / 4-channel via ISO speaker output.
Blue wire: +12 V REMOTE for amplifier activation.
Brown wire: GND ground (optional – use if audio output is missing).

Settings:

Check DIP switches according to aftermarket radio type.
Fine-tuning of OEM audio system levels is possible for each channel separately.

Special Notes:

For vehicles 08/2010 -> 04/2014 with non-functional OEM amplifier after installation: switch coding from "CAN Bus activation" to "Remote activation," if the unit allows (J525 > Activation 1 Remote, 0xxx?xx).

Diagnostic LED Indication:

Blue flashing: searching for CAN Bus signal.
Blue on: CAN Bus active.
Red on: active +12 V ignition current.

Important Additional Information

Designed for aftermarket radios Sony, Kenwood, Panasonic, JVC, Pioneer, Blaupunkt, Clarion, Alpine, LG, Zenec, Becker.
A connection cable for the specific radio brand is required for full adapter activation.

General Installation Guidelines

Pre-installation Verification:

Check all control functions and vehicle settings with the original OEM head unit.
Disconnect the original radio (OEM HU) with no power.
Check all interface connections to ensure they are properly connected – with no power.

Connection and Wiring Sequence:

Check interface settings and HW configuration – with no power.
Check the connection cable configuration to HU – with no power.
Connect the cable to HU according to aftermarket device instructions.
Connect other wires according to device instructions.
Link the entire installation with the vehicle – connect the main power connection last.
Perform software configuration of the interface as per product description or manual instructions.
Configure aftermarket HU (e.g., steering wheel control, camera, handsfree, antenna power).
Perform a functional test of steering wheel control and communication with the vehicle.

Changing Interface and HU Cable Configuration:

Make all changes with no power.
Repeat steps 5 to 8 listed above.

In Case of Interface or Vehicle System Failure:

Reinstall the original OEM HU.
Start the original unit.
Call for CAN Bus system shutdown.
Check HW configuration of the interface.
After CAN Bus shutdown, repeat steps 5 and 6 listed above.

When Modifying Wiring or Cable Routing:

Connections and modifications should only be performed by professionally trained personnel.
All changes must be verified for manufacturer approval or impact on vehicle warranty before connection.
All modifications must be verified by measuring and comparing with the vehicle's wiring diagram before connection.
Modifications are done at your own risk, with no guarantee of functionality.
Modifications are done at your own risk, with no guarantee of excluding damage to the vehicle, device, or interface.
Pre-installed cable modifications may lead to product warranty loss.