Steering wheel button control adapter for Audi / Seat ACV SWC 42A-1321-00C-0

steering wheel adapter for Audi A1 (8X) (07/10->04/18), A2 (8Z) (11/99->07/05), A3 (8L) (08/00->06/03), 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 (8N) (09/98->07/06), 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-1321-00C-0

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Steering Wheel Control Adapter for Audi / Seat ACV SWC 42A-1321-00C-0

Retain the original steering wheel control functions for the car radio when replacing the original radio with an aftermarket unit. Depending on the vehicle's configuration, the range of functions, and the software of the newly installed car radio, some functions may be limited or replaced with others. Compare the displayed wiring connectors with those in your vehicle to ensure they match both technically and visually. Verify if any of the listed OEM car radios were originally installed. Before final installation, check the vehicle's functionality, system settings, and proper steering wheel control operation (SWC).

Designed for cars

Audi A1 (8X) 07/2010 -> 04/2018 - original Chorus OEM car radio with monochrome display.
Audi A2 (8Z) 11/1999 -> 07/2005 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A3 (8L) 08/2000 -> 06/2003 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A3 (8P) 05/2003 -> 04/2005 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A3 (8P) 10/2004 -> 04/2013 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A4 (B6) 11/2000 -> 10/2005 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A4 (B7) 11/2004 -> 02/2009 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi A6 (C5/B4) 05/2001 -> 03/2006 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi Q3 (8U) 10/2011 -> 11/2014 - original Chorus OEM car radio with monochrome display.
Audi Q3 (8U) 02/2015 -> 06/2018 - original Chorus OEM car radio with monochrome display.
Audi R8 (42) 04/2007 -> 05/2015 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi TT (8N) 09/1998 -> 07/2006 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi TT (8J) 09/2006 -> 04/2010 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Audi TT (8J) 08/2010 -> 04/2014 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.
Seat Exeo (3R) 03/2009 -> 05/2013 - original Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II car radio.

CAN Bus Information

Connectors and Power:

ISO / Mini ISO Audi Connector (item: 42cx23-rca).
40 Pin Quadlock Audi Connector (item: 42cx25-rca).
OEM amplifier connection 2-channel / 4-channel via CINCH (m) front/rear.
Blue wire: +12 V REMOTE for amplifier activation.

Settings:

Check the DIP switches according to the type of aftermarket car radio.
Supports OEM radios Blaupunkt / Matsushita / Grundig Concert II / Symphony II / Chorus II (1-DIN and 2-DIN), OEM navigation BNS 5.0 and RNS-E 16:9.
When used with aftermarket radios with output < 3V, a special adapter is required (42a-1321-006 for 40Pin Quadlock, 42a-1321-008 for ISO/Mini ISO).
For Audi TT vehicles 08/2010 → 04/2014, a change of amplifier coding from CAN Bus to Remote activation may be required (if supported).

Diagnostic LED Indication:

Blue flashing: Searching for CAN Bus signal.
Blue steady: CAN Bus active.
Red steady: Active +12 V ignition current.

Important Additional Information

Designed for aftermarket car radios Sony, Kenwood, Panasonic, JVC, Pioneer, Blaupunkt, Clarion, Alpine, LG, Zenec, Becker.
To fully activate the adapter, it is necessary to order a connecting cable for the specific brand of car radio.

General Installation Guidelines

Verification before Installation:

Check all control functions and vehicle settings with the original OEM head unit.
Disconnect the original radio (OEM HU) without power.
Check all interface connections to ensure they are properly connected – without power.

Connection and Wiring Order:

Check the interface settings and hardware configuration – without power.
Check the connection cable configuration to the HU – without power.
Connect the cable to the HU according to the aftermarket device instructions.
Connect other wires according to the device instructions.
Connect the entire installation to the vehicle – connect the main power connection last.
Perform software configuration of the interface according to the product description or instructions.
Configure the aftermarket HU (e.g., steering wheel control, camera, handsfree, antenna power).
Conduct a functional test of the steering wheel control and vehicle communication.

Changing Interface and HU Cable Configuration:

Make all changes without power.
Repeat steps 5 to 8 listed above.

In Case of Interface or Vehicle System Malfunction:

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

When Modifying Wiring or Cable Routing:

Only professionally trained personnel may perform wiring and modifications.
All changes must be verified for manufacturer approval or warranty impact before connection.
All modifications must be verified by measurement and compared with the vehicle's wiring diagram before connection.
Modifications are made at your own risk, without a warranty for functionality.
Modifications are performed at your own risk, without a guarantee against damage to the vehicle, device, or interface.
Modifications to pre-installed wiring may lead to product warranty loss.