OEM Part Numbers

Technical Specifications

Product Description

This is a genuine brand-new OEM Haldex control unit with part number 09N907554C. It is a critical component of the fourth-generation Haldex all-wheel-drive system used in Volkswagen T5 platform vehicles, responsible for controlling rear differential clutch engagement and enabling correct torque transfer to the rear axle when traction is required.

What This Control Module Does

• Controls hydraulic activation of the Haldex coupling for rear-wheel engagement
• Supports proper AWD / 4x4 operation in Transporter T5, Multivan and California applications
• Communicates with ABS / ESP and related drivetrain systems
• Stores and reports diagnostic trouble codes when faults occur
• Supports traction and stability in low-grip road conditions

Vehicle Compatibility

The 09N907554C is compatible with selected Volkswagen T5-series vehicles equipped with Gen 4 Haldex AWD. Always verify the exact part number on your existing module before ordering.

Volkswagen

Common Symptoms of a Faulty Module

A defective Haldex control unit commonly causes the following issues:

Installation

Installation Steps

• Verify the exact OEM part number on the original control unit
• Disconnect the battery and safely access the Haldex module on the rear differential
• Remove the old controller and inspect connector pins and housing for corrosion or moisture
• Install the replacement ECU carefully and reconnect all plugs securely
• Clear stored fault codes and confirm AWD module communication 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 control valve N373 or related pump components 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.

Quality Assurance & Warranty

24-Month Warranty: This new Haldex control unit has been tested for correct operation and is supplied with a 24-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
• Images are for illustrative purposes only
• Worldwide shipping is available
• If your country is not listed at checkout, contact us and the order can be processed manually
• It is recommended to replace the Haldex control valve N373 when replacing the control unit
• Coding or adaptation may be required after installation and online support is included