OEM Part Numbers

Technical Specifications

Product Description

This is a genuine refurbished OEM Haldex control unit with part number 0BS907554D. It is a key electronic component of the fourth-generation Haldex all-wheel-drive system and is responsible for activating and regulating the rear differential clutch pack in response to traction demands and driving conditions.

What This Control Module Does

• Controls rear differential clutch engagement in the 4th gen Haldex system
• Helps restore correct AWD performance when the original module has failed
• Communicates with ABS, ESP and drivetrain electronics
• Manages the N373 Haldex control valve for clutch pressure regulation
• Supports stable rear axle engagement in changing traction conditions

Vehicle Compatibility

The 0BS907554D is compatible with selected Volkswagen Group vehicles equipped with Gen 4 Haldex AWD. Always verify the exact part number on your existing module before ordering.

Škoda

Volkswagen

Audi

SEAT

Common Symptoms of a Faulty Module

A defective Haldex control unit commonly causes the following issues:

Installation

Installation Steps

• Locate the Haldex control unit mounted on the rear differential assembly
• Disconnect the electrical connector and remove the old module
• Install the replacement unit and secure all mounting points properly
• Reconnect all electrical connectors and verify a secure fit
• Clear stored fault codes with suitable diagnostic equipment
• Code or adapt the module if required by the vehicle
• Perform a test drive and confirm correct AWD engagement

Why Haldex Control Units Fail

1. Water Ingress & Sealing Failure

Moisture and damaged sealing can affect the control unit housing and internal electronics, leading to corrosion, unstable communication and complete AWD malfunction.

2. Valve or Pump Related Faults

Failure of the Haldex pump or the N373 clutch control valve can overload the system and trigger repeated module-related diagnostic errors.

3. Internal Electronic Failure

EEPROM faults, internal memory errors and circuit-board wear can cause intermittent operation, no communication faults or complete loss of rear differential control.

4. Wiring or Power Supply Problems

Damaged wiring, poor terminal contact or unstable power supply can interrupt module operation and create misleading communication or actuator fault codes.

Warranty

12-Month Warranty: This refurbished Haldex control unit has been tested for correct operation and is supplied with a 12-month warranty under normal operating conditions.

Warranty Coverage Includes:

• Internal control unit malfunction
• Communication failures caused by the module itself
• Faults related to internal memory or controller operation

Warranty Exclusions:

• Incorrect installation or incompatible vehicle fitment
• External wiring, pump or valve faults
• Physical damage, water damage after installation or mishandling

Questions or Need Help?

Our technical team is ready to assist with compatibility checks, installation guidance and coding support.

Important Purchase Information

• Please verify this part fits your specific vehicle before placing an order
• Photos are for illustrative purposes only and the supplied unit may differ in appearance
• Worldwide shipping is available
• If your country is not listed at checkout, contact us and the order can be processed manually
• Coding or adaptation may be required after installation and online support is included