System Type
Haldex AWD 2nd Generation
Condition
Refurbished Fully Functional
Manufacturer
Siemens
Supplier Reference
HAP511 / 5WP2222-02
Software / Hardware
SW 0107 / HW H05
Warranty
12 Months
Tested & Verified Working Unit
Each module is professionally refurbished, tested and verified as a reliable OEM replacement for a faulty original Haldex controller in Gen 2 AWD systems.
OEM Part Numbers
OEM Reference Numbers:
1K0907554B • 1K0 907 554 B • HAP511 • 5WP2222-02 • SW 0107 • HW H05
Compatible ECU Numbers:
1K0907554 • 1K0907554A • 1K0907554B
Always Verify Your Part Number
Before placing an order, check the OEM number printed directly on your original Haldex control unit. Vehicle model alone is not always enough to guarantee compatibility.
Technical Specifications
System Type:
Haldex AWD 2nd Generation
Component:
Rear Differential Control Unit
Supplier Ref:
HAP511 / 5WP2222-02
Software Version:
SW 0107
Application:
Volkswagen Group AWD vehicles with Gen 2 Haldex
Part Condition:
Refurbished / Fully Tested
Product Description
This is a refurbished original Siemens Haldex control unit with OEM number 1K0907554B, developed for second-generation Haldex AWD systems used in Volkswagen Group vehicles. The module controls rear axle engagement, manages clutch pressure strategy and communicates with ABS / ESP and drivetrain systems.
What This Control Unit Does
- Controls the Haldex coupling for rear-wheel engagement on demand
- Communicates with ABS / ESP and drivetrain modules
- Monitors system operation and stores diagnostic trouble codes
- Controls pre-charge pump activation and clutch pressure strategy
- Helps restore stable AWD function in low-traction conditions
Online Coding Support
Coding support is available if required after installation. If you need guidance with diagnostics or setup, contact us and we will help you choose the correct procedure for your vehicle.
Vehicle Compatibility
Typical applications for this Gen 2 Haldex control unit include the following vehicles. Always confirm the part number on your original module before ordering.
Volkswagen
- Golf 4Motion / R32
- Passat 4Motion
Audi
Škoda
SEAT
- Selected AWD models with Gen 2 Haldex
Not Sure About Compatibility?
Send us your VIN number or your original ECU part number and we will help verify fitment before you order.
Common Symptoms of a Faulty Module
A faulty Haldex control unit can trigger fault codes, communication problems and complete loss of rear-wheel engagement. Typical symptoms include:
-
00003 – Control Module Defective
-
00448 – Haldex Clutch Pump Fault
-
01324 – All Wheel Drive Control Module: No Communication
-
02248 – Clutch Control Valve N373 Fault
-
16347 – Internal Controller Fault
- ESP / ABS warning lights on the dashboard
- Rear-wheel drive not engaging or intermittent AWD operation
Installation
Installation Notes
- Disconnect the battery and access the rear differential Haldex module safely
- Remove the old control unit and inspect connectors for corrosion or moisture
- Install the replacement ECU carefully and reconnect all plugs securely
- Clear fault codes and confirm AWD communication with a diagnostic tool
- Carry out coding or adaptation if requested by the vehicle
Recommended Service Items
- Check or replace the Haldex control valve N373 if faulty
- Inspect the pre-charge pump and related wiring
- Renew Haldex oil / service fluid
- Perform a test drive and confirm correct AWD engagement
Online Technical Support Included
If the control unit requires coding assistance after installation, our technical team is available to help. Reach us using the contact button below or at
[email protected]
Why Haldex Control Units Fail
1. Water Ingress & Sealing Failure
Moisture, worn seals and housing contamination can affect the control unit 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 AWD system and trigger recurring module-related diagnostic errors, communication faults or loss of rear axle engagement.
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, valve or drivetrain 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.
Contact Us
Important Purchase Information
- Please verify the part number before ordering
- Images are for illustrative purposes only
- Worldwide shipping is available
- Replacing Haldex oil and checking valve N373 is recommended when fitting a replacement ECU
- Online coding support is available if required after installation
