Siemens
Haldex control unit 7H0907554E Refurbished
Haldex control unit 7H0907554E Refurbished
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Refurbished Haldex Control Unit 7H0907554E – Gen 2 AWD
OEM rear differential control module for Volkswagen T5 4Motion, Transporter and Multivan AWD applications
OEM Part Numbers & Cross-References
7H0907554E • 7H0 907 554 E
7H0907554 • verify exact printed number on the original module before ordering
HAP511 • Siemens 5WP22223-04 • SW:2109 • HW:H05
Technical Specifications
Product Description
This is a refurbished OEM Haldex control unit with part number 7H0907554E, intended for second-generation Haldex AWD systems in Volkswagen T5 platform vehicles. The module controls rear differential engagement, supports traction transfer to the rear axle and communicates with the vehicle’s drivetrain and stability systems.
What This Control Unit Does
- Controls hydraulic activation of the Haldex coupling for rear-wheel engagement
- Helps restore proper AWD / 4x4 operation in Volkswagen T5 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
A faulty Haldex ECU can cause rear axle disengagement, traction loss, communication errors or ESP / ABS warning lights on the dashboard. This refurbished unit is fully tested and resealed with new silicone and cover for dependable long-term use.
Vehicle Compatibility
This Haldex controller is intended for Volkswagen T5-based AWD vehicles using the matching Gen 2 rear differential control unit. Always verify the exact number on your original module before purchase:
Volkswagen
- T5 4Motion
- Transporter AWD
- Multivan AWD
- Selected Volkswagen T5 platform vehicles with matching 7H0907554E / 7H0907554 controller
Common Diagnostic Fault Codes
Problems with the Haldex control unit can trigger communication faults, valve faults or warning lights on the dashboard. Common fault codes and symptoms include:
-
00003– Control Module: Defective -
01324– Control Module for All Wheel Drive: No Communication -
02248– Valve for Controlling Clutch Operating Angle (N373): Defective -
No Communication– AWD module not responding -
N373– Haldex clutch control valve fault - ESP / ABS warning lamps illuminated on dashboard
- Rear-wheel drive not engaging or 4x4 / AWD not working correctly
- Rear axle disengagement or loss of traction support
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
- Check the wiring, connectors and surrounding module area
- Inspect the Haldex system for stored drivetrain or stability-control faults
- Verify AWD operation after installation and road test
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 Volkswagen AWD vehicle.
Contact UsImportant Purchase Information
- Please verify this part fits your specific vehicle before placing an order
- The photos are for illustrative purposes only
- Worldwide shipping is available – if your country is not shown at checkout, contact directly for manual processing
- Replacing the Haldex valve N373 is recommended when fitting a replacement ECU
- Online support is included if the module requires coding after installation
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