OEM Part Numbers

Technical Specifications

Product Description

This is a refurbished original Continental Haldex control unit with OEM number 2K0907554A, developed for Volkswagen Caddy AWD vehicles equipped with the 4th generation Haldex system. The module manages rear axle engagement by controlling hydraulic pressure inside the Haldex coupling and communicating with the vehicle AWD, ABS and ESP systems.

What This Control Module Does

• Controls rear-wheel engagement when extra traction is required
• Communicates with ABS, ESP and drivetrain electronics
• Monitors system operation and stores diagnostic trouble codes
• Controls pump and clutch pressure strategy in the Haldex coupling
• Helps restore proper AWD operation when the original ECU has failed

Vehicle Compatibility

This Haldex control unit is intended for Volkswagen Caddy AWD applications. Always confirm the part number on your old module before purchase.

Volkswagen

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 Haldex ECU on the rear differential
• Remove the old control unit and inspect the connector for corrosion or moisture
• Install the replacement ECU carefully and reconnect all plugs securely
• Clear stored fault codes and check communication with a suitable diagnostic tool
• Carry out coding if required by the vehicle after installation
• Perform a test drive and confirm correct AWD engagement

Why Haldex Control Units Fail

1. Water Ingress & Connector Corrosion

Moisture and contamination at the connector or housing can damage internal electronics and lead to unstable communication or total AWD failure.

2. Pump or Valve Related Faults

Issues with the Haldex pump or N373 control valve can overload the system and trigger repeated control module faults.

3. Internal Electronic Failure

Internal circuit wear and electronic failure can cause intermittent operation, no communication faults or complete loss of rear axle engagement.

4. Wiring or Power Supply Problems

Damaged wiring, poor terminal contact or unstable power supply can interrupt module operation and create misleading drivetrain-related errors.

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
• Coding or adaptation may be required after installation and online support is included