OEM Part Numbers

Technical Specifications

Product Description

This is a genuine refurbished OEM Haldex control unit with part number 1K0907554F. It is a key electronic component of the second-generation Haldex all-wheel-drive system and is responsible for controlling the hydraulic operation of the Haldex clutch and rear axle engagement when traction is required.

What This Control Module Does

• Controls the Haldex coupling for rear-wheel engagement on demand
• Communicates with ABS, ESP and drivetrain modules
• Monitors AWD system operation and stores diagnostic trouble codes
• Controls pump activation and clutch pressure strategy
• Supports stable AWD function in normal driving and low-traction conditions

Vehicle Compatibility

The 1K0907554F is compatible with selected Volkswagen Group vehicles equipped with Gen 2 Haldex AWD. Always verify the exact part number on your existing module before ordering.

Volkswagen

Audi

Škoda

SEAT

Common Symptoms of a Faulty Module

A defective Haldex control unit commonly causes the following issues:

Installation

Installation Steps

• Disconnect the battery and safely access the rear differential Haldex module
• Remove the old control unit and inspect connectors for corrosion or moisture
• Fit the replacement ECU carefully and reconnect all plugs securely
• Clear fault codes and check AWD module communication with suitable diagnostic equipment
• Carry out any required coding or adaptation if your vehicle requests it
• 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 pump can overload the system and trigger repeated module-related diagnostic errors.

3. Internal Electronic Failure

Internal circuit faults, controller wear and communication failure can cause intermittent operation 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 controller operation under normal use

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
• Replacing Haldex oil and checking the N373 valve is recommended when fitting a replacement ECU
• Coding or adaptation may be required after installation and online support is included