System Type
Haldex AWD 2nd Generation
Condition
Refurbished – Fully Tested & Functional
Manufacturer
Siemens
Supplier Reference
HAP511nm / 5WP22241-01
SW / HW Version
SW 0116 / HW H06
Warranty
12 Months
Refurbished & Verified Working Unit
Professionally refurbished, sealed with new silicone and fully tested replacement Haldex controller for Gen 2 AWD systems. Designed to restore rear differential engagement and reliable communication with the AWD system in compatible VAG vehicles.
OEM Part Numbers & Cross-References
Main OEM Part Numbers:
1K0907554L • 1K0525130L • 5WP22241-01 • 109429-01
Compatible / Interchangeable ECU Numbers:
1K0907554 • 1K0907554A • 1K0907554B • 1K0907554C • 1K0907554F • 1K0907554L
Related Module References:
HAP511nm • 5WP22241-01 • SW 0116 • HW H06
Always Verify Your Part Number
Before ordering, compare the printed part number on your current Haldex controller. Vehicle model alone is not always enough to guarantee compatibility.
Technical Specifications
System Type:
Haldex AWD 2nd Generation
Component:
Rear Differential Control Unit (ECU / AWD Module)
Supplier Ref:
HAP511nm / 5WP22241-01
Software Version:
SW 0116
Application:
Volkswagen Group AWD vehicles with 2nd generation Haldex coupling
Part Condition:
Refurbished – Fully Tested & Functional
Product Description
This is a refurbished original Siemens Haldex control unit with OEM number 1K0907554L, developed for second-generation Haldex AWD systems used in Volkswagen Group vehicles. The module manages rear axle engagement by controlling the hydraulic operation of the Haldex clutch and communicating with ABS / ESP and drivetrain systems.
What This Control Unit Does
- Controls the Haldex coupling for rear-wheel engagement on demand
- Communicates with the vehicle’s ABS / ESP and drivetrain modules
- Monitors system operation and stores diagnostic trouble codes
- Controls pre-charge pump activation and clutch pressure strategy
- Supports stable AWD function in normal driving and low-traction conditions
A faulty Gen 2 Haldex ECU can cause total loss of rear drive, intermittent AWD operation, CAN communication errors, or ESP / ABS warning lights. This refurbished version is resealed with new silicone for durability comparable to a new module and is tested before dispatch.
Coding Support
Online support is included in case the module needs to be coded after installation. If you need advice with diagnostics or setup, contact us and we will help you choose the correct procedure for your vehicle.
Vehicle Compatibility
Common applications for this 2nd generation Haldex control unit include the following VAG AWD vehicles. Always confirm the part number on your old module before purchase:
Volkswagen
- Volkswagen Tiguan AWD
- Volkswagen Passat AWD
- Volkswagen Golf 4Motion / Golf V 4Motion
Audi
- Audi A3 / S3 Quattro
- Audi TT Quattro
Škoda
- Skoda Superb AWD
- Skoda Octavia II 4x4
- Skoda Fabia AWD applications with matching controller
SEAT
- Seat Altea 4x4
- Selected VAG vehicles using matching 1K0907554-series or 1K0525130L Haldex ECU
Not Sure About Compatibility?
Send us your VIN number or the part number from your existing Haldex ECU and we will help verify the correct controller before you order.
Common Diagnostic Fault Codes & Symptoms
Problems with the Haldex control unit can trigger communication faults, pump or valve faults, and dashboard warning lights. Common fault codes and symptoms include:
-
00003 – Control Module: Defective
-
00448 – Haldex Clutch Pump (V181): Faulty / Open Circuit
-
02248 – Valve for Controlling Clutch Operating Angle (N373): Defective
-
01324 – Control Module for All Wheel Drive (J492): No Communication
-
16347 – Control Module Defective / Internal Fault
-
65535 – Internal control module memory error
-
No Communication – AWD module not responding
- ESP / ABS warning lights on the dashboard
- Rear differential disengagement or AWD not working correctly
Installation & Recommended Service
Installation Notes
- Disconnect the battery and safely access the Haldex module on the rear differential
- Remove the old controller and inspect the connector pins and housing for corrosion or moisture
- Install the replacement ECU carefully and reconnect all plugs securely
- Clear fault codes and confirm AWD module communication with a suitable diagnostic tool
- Carry out coding or adaptation if required by the vehicle after installation
Recommended While Replacing the Unit
- Replace the Haldex control valve N373 when replacing the control unit
- Renew Haldex oil / service fluid
- Check the pump and connector condition before final installation
- Inspect the pre-charge pump and wiring
- Check for stored ABS / AWD communication faults after installation
Online Technical Support Included
If the module requires coding assistance or you need advice after installation, our technical team is available to help. Reach us via the contact button below or at
[email protected]
Why Haldex Control Units Fail
1. Moisture Ingress & Corrosion
Water or condensation inside the module housing can damage the electronics and interrupt communication with the AWD system.
2. Pump or Valve Faults
Failures in the Haldex clutch pump or N373 valve can overload the ECU and trigger repeated drivetrain faults or rear axle disengagement.
3. Internal Electronic Failure
Age, vibration and temperature cycling can lead to internal circuit failure, memory errors and unstable AWD operation.
4. Wiring or Connector Problems
Corroded plugs, damaged wiring or weak power supply can create no-communication errors and unreliable AWD function.
Quality Assurance & Warranty
12-Month Warranty: This refurbished Haldex control unit is supplied with a 12-month warranty for the product itself and is tested before dispatch.
Warranty Includes
- Verified functionality of the controller hardware
- Bench-tested operation before shipping
- Basic pre-purchase compatibility guidance
Warranty Does Not Cover
- Incorrect part ordering without part-number verification
- Damage caused by wiring faults, moisture ingress or improper installation
- External pump, valve or vehicle-side electrical faults
Questions or Need Help?
If you have any questions about compatibility, diagnostics, or installation, contact us and we will help you choose the correct Haldex solution for your vehicle.
Contact Us
Important Purchase Information
- Please verify this module fits your specific vehicle before placing an order
- Worldwide shipping is available – if your country is not shown at checkout, contact us directly
- Replacing Haldex oil and checking the N373 valve is recommended when fitting a replacement ECU
- Online support is included if the module requires coding after installation
