Steering wheel button control adapter for BMW ACV SWC 42XBM004-0

Steering wheel button control adapter for BMW ACV SWC 42XBM004-0

Retain 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 head unit, some functions may be limited or replaced by others. Compare the displayed wiring connectors with the connectors in your vehicle and make sure they match both technically and visually. Check whether one of the listed OEM head units was originally installed. Before final installation, verify the vehicle functionality, system settings and proper operation of the steering wheel control (SWC).

Intended for vehicles

• BMW Series 3 (E46) (07/1998->02/2007) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• BMW Series 5 (E39) (09/2000->05/2004) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• BMW X3 (E83) (02/2004->08/2010) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• BMW X5 (E53) (03/2000->11/2006) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• BMW Z4 (E85) (03/2002->08/2008) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• Mini (R50/R53) (06/2001->11/2006) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.
• Mini (R52) (07/2004->08/2008) with Business OEM radio, without Professional OEM navigation, and without OEM amplified audio system.

CAN Bus Information

• Connection: 40 pin BMW Quadlock connector.
• Steering wheel control output: 3.5 mm jack / loose wire (depending on aftermarket unit type).
• If unsure about BMW connector type, use wiring harness 42xbm00c (includes both 17 pin and 40 pin Quadlock).
• Designed for vehicles with OEM Business unit (without Professional OEM navigation) and without OEM audio system (DSP / Harman Kardon).
• Recommended to remove OEM accessories: CD changer / TV tuner / phone module.
• Set DIP switches according to aftermarket radio brand (see BDA).

Important Additional Information

• To ensure full functionality, a suitable connection cable must be ordered for the specific aftermarket head unit brand.

General Installation Instructions

Verification Before Installation:

1. Check all control functions and vehicle settings using the original OEM HU.
2. Disconnect the original radio (OEM HU) in a voltage-free condition.
3. Check all interface connections – without power.

Connection and Installation Sequence:

1. Set and check the HW configuration of the interface – without power.
2. Check the configuration of the HU connection cable – without power.
3. Connect the cable to the HU according to the aftermarket device manual.
4. Connect the remaining wires according to the device manual.
5. Connect the complete installation to the vehicle – connect the main power supply last.
6. Perform the software configuration of the interface according to the product description or manual.
7. Configure the aftermarket HU (steering wheel control, camera, handsfree, antenna power etc.).
8. Perform a functional test of steering wheel control and vehicle communication.

Configuration Changes:

• All changes must be carried out without power.
• After changes repeat steps 5 to 8 above.

In Case of Failure:

• Reinstall the original OEM HU.
• Start the original unit.
• Initiate CAN Bus shutdown.
• Check the HW configuration of the interface.
• After CAN Bus shutdown repeat steps 5 and 8.

When Modifying Wiring:

• Installation and modifications may only be carried out by professionally trained personnel.
• All changes must be verified before connection regarding manufacturer approval or impact on vehicle warranty.
• All modifications must be verified by measurement and comparison with the vehicle wiring diagram.
• Modifications are carried out at your own responsibility without guarantee of functionality.
• Modifications are performed at your own risk without guarantee against damage to the vehicle, device or interface.
• Modifications of pre-installed wiring may result in loss of product warranty.