Frequently Asked Questions

Please view our dedicated page here: https://www.haldexrepairs.co.uk/what-generation-of-haldex-is-on-my-car/

Yes. We often receive Haldex units which have been elsewhere and we have a very high success rate of fixing them!

You send your Haldex ECU to us via Royal Mail Special Delivery after purchasing our repair service using one of the links below. On the day we receive it we will test it, and if its faulty we will fix it (if viable) and reseal it.

If not faulty or not viable for repair we will rebuild it, seal it back up and call you to discuss a refund (minus small diagnostics fee + return postage costs) and talk to you about further options.

We will then send it back to you via Royal Mail Special Delivery for next day delivery.

Click Here To Order Gen 2 & 4 Repair Service

Click Here To Order Gen 5 Repair Service

Click Here To Order Scrabble Stopper Mod Service (Freelander 2 and Evoque)

It all depends on your competence, confidence and ineptness! Who are we to judge!

Gen 5 units are easier to remove and are held on with just 2 bolts and 2 easily accessible electrical connectors.

Gen 2, 3 and 4 have 2 awkward electrical connector plugs and often have seized allen bolts holding them on.

For Gen 2, 3 and 4 units, it is possible to slowly move the car in and out of a garage, but the vehicle must not be driven over walking pace as oil will leak out of the coupling and there is a risk of losing the slot in valve and sensor. So you must not drive the vehicle once the ECU is removed.

A Gen 5 Haldex vehicle will drive with no mechanical issues with the controller removed. It will though have lots of warning lights on the dashboard for ESP, Hill Assist, Parking Brake, TPMS etc

If you send your N373 valve to us with your Haldex unit, we will happily inspect and test it for no extra cost.

We aim to process & repair all Haldex units the same day they are received. They are then shipped back the same day too by Royal Mail Next Day Special Delivery (1pm). Upon dispatch by us, you will receive a VAT invoice and a Royal Mail Tracking code by email.

On average, you should receive your Haldex unit back within 48 – 72 hours of you sending it to us.  We are very busy during the winter months, and sometimes it might take an extra day or two so please bear with us!

If your Haldex Controller unit is beyond repair, we will call you to discuss your options below:

Option 1: Offer you a brand new replacement board

Option 2: Issue you a refund minus a small diagnostics fee and return postage cost. It will then be sent back to you via Royal Mail Next Day Special Delivery (1pm)

For Generation 2 and Generation 4 controller repairs we are getting around a 95% success rate for corrosion repairs. But, less than 50% of all Gen 4 units sent in are actually faulty as the most common cause of the problem is defective pumps and clogged up filters, which we stock and can sell via mail order. Please view our Gen 4 Haldex Troubleshooting Guide before ordering our repair service.

For Generation 5 repairs, we are getting a 100% success rate!

If your Haldex Controller unit is deemed to be not faulty, we will thoroughly clean and re-coat the PCB board to ensure it will not corrode in the future. We will clean up the case to ensure a successful bond and repair any corrosion holes or replace the front cover if required,  before resealing the unit correctly to ensure it is water tight.

Finally, we will give you a phone call and issue you a refund minus a small diagnostics fee and return postage cost. It will then be sent back to you via Royal Mail Next Day Special Delivery (1pm). We will also help you diagnose your problem and suggest possible solutions.

We will replace your front cover with a brand new one if your existing cover shows signs of corrosion. It might not be evident from the outside at first, but once the units are opened up, it is quite common for there to be corrosion, preventing a good seal when put back together.

We can repair Land Rover Freelander 2 and Range Rover Evoque Haldex units.

Please see our Land Rover Freelander 2 and Range Rover Evoque Trouble Shooting Guide

Yes, we have testing facilities for Volvo Haldex Controller Units and a comprehensive Volvo Haldex Troubleshooting Guide.

No, we do not repair Generation 1 Haldex Controller units.

We have an infinite supply of new Gen 2 and Gen 4 controllers available on our website here: https://www.haldexrepairs.co.uk/product-category/haldex-controller-units-ecu-dem-rdcm/

We also have a selection of used Gen 5 controllers available which have been reconditioned by us.

Be cautious of buying second hand controllers elsewhere as they all have some element of corrosion inside. If you wish, we can test and reseal your own controller which will seriously extend its life expectancy.

We can supply brand new Haldex Pumps, Haldex Oil & Haldex Filters separately or as a Pump, Oil & Filter Bundle Kit.

We also have Haldex Service Kits and a small quantity of Gasket Plates, Concaved Washers, Fixing Screws, Clutch/Couple Opening Oil Control Valves (N373) and Pressure Sensors (G437). Mostly these are used/second hand components but helpful when missing.

Please enquire for prices and availability.

There is no learn on the Gen 4 Haldex. Only the newer Gen 5 pumps need the learn function.

Please see our Gen 5 Haldex Troubleshooting guide here for full instructions on the “pump learn” function.

You can also watch our Youtube video here: https://www.youtube.com/watch?v=ldzkXe93PMs

We accept all major Credit and Debit cards online, over the phone or in person. We can also take bank transfers.

Unfortunately not, due to import taxes we would have to pay when receiving your unit.

In the past when we offered a worldwide repair service, people would send their Haldex units to us and declare the value of them as the full brand new retail value of say £800, so we would end up paying import tax on that amount.

We used to, but due to experiencing many problems with our international couriers, and the extra labour and time needed to prepare and dispatch these orders, we have decided to stop offering international shipping.

We do plan on offering international shipping again in the future, and when we do, we will update this page.

Typically Gen 2 units are fitted to VW & Audi group vehicles between 2003 to 2009 including Golf R32, Passat R35 and 3.2, Audi A3 S3 8P 2003 to 2008, Audi TT Mk2 8J 2006 to 2010 and almost every other VW, Audi, Seat and Skoda vehicle between 2003 and 2010.

Generation 2 control units have the following part numbers:-

1K0907554 1K0907554A 1K0907554B 1K0907554C 1K0907554F 1K0907554K 1K0907554L – All original manufacturer fitted units. While early Gen 2 units were only marked VW hap511 5wp22202 but are a 1k0907554

1K0525130 1K0525130A 1K0525130B 1K0525130C 1K0525130F 1K0525130L – Units fitted later in the vehicles life as a replacement unit from VW Audi.

All Generation 2 controllers are cross compatible so they can be swapped without any coding or problems, except those fitted to VW Transporter vehicles with the Diff Lock function. They have a slightly different PCB population and software version.

• 02248 – Valve for Controlling Clutch Operating Angle (N373) 014 – Defective – Intermittent
• 00448 – Haldex Clutch Pump (V181) 014 – Defective – Intermittent
• 02249 – Sensor for Oil Pressure and Oil Temperature (G437) 004 – No signal OR 014 – Defective – Intermittent
• 00003 – Control module faulty sporadic – 014
• 01324 – All Wheel Drive Control Module -J492- 013 – Read Fault Memory sporadic
• 65535 – Internal Control Module Memory Error 00-10 – Intermittent
• 01324 – Control module for ALL WHEEL DRIVE (J492) 004 – No signal/communication – intermittent.
• 00003 – Control Module 014 – Defective – Intermittent / Control module faulty sporadic
• 16347 – Control Module – EEPROM error – 014 – Defective – Intermittent

The easiest way to resolve Gen 2 Haldex faults is to get the ECU removed from the vehicle and send it to us via Royal Mail Special delivery for a same day test and repair service. You cannot drive the car with the ECU removed, and once removed if you shake the ECU you will typically hear the salt inside it.

Click Here To Order Generation 2 Haldex Repair Service

Typical Generation 4 Haldex systems are often found fitted to the Audi S3 A3 2009 onwards, late model post 2009 VW Golfs including R32, GTI and Golf R, Audi TT including TTRS TTS, Passat 4-Motion R36, VW Transporters and the VW Tiguan along with other VW Audi Seat and Skoda vehicles of this age.

These generation 4 control units have the following part numbers:-

Audi TT, TTS, A3, S3, Seat Altea, Skoda Yeti, Superb, VW Golf 4 Motion R32, GTi, R32
0BR907554 – 0BR907554A – 0BR907554B – 0BR907554C – 0BR598554 – 0BR598554A – 0BR598554B

VW Transporter (note Diff Lock – Not Compatible with other Gen 4 Controllers – Rare)
09N907554A – 09N598554 – 09N598554A

VW Tiguan, Sharan, Seat Alhambra
0AY907554C – 0AY907554D – 0AY907554E – 0AY598554 – 0AY598554A – 0AY598554B – 0AY598554C

Audi Q3, VW Passat All Track
0BS907554 – 0BS907554A – 0BS907554B – 0BS907554C – 0BS598554 – 0BS598554A

For further information, please see our Gen 4 Haldex Troubleshooting Guide.

Typically after 50k to 70k the filter blocks up on these Gen 4 vehicles. You will be told by dealers, garages and parts suppliers that there is no filter on these systems. The photo and diagram half way down this page show the filter but VW/Audi claim they are fitted for life, and a non serviceable item! You cannot buy one from them as there is no part number etc. As the filter gets clogged the pump motor works over time wearing out the brushes and bearings and overheating the copper winding. Once the motor goes above or below the 7 ohm coil rating it will no longer pump correctly and needs to be replaced. We can supply replacement Haldex Filters and Haldex Pumps or a Pump, Oil & Filter Bundle Kit.

For further information, please see our Gen 4 Haldex Troubleshooting Guide.

Please see our guide here: How to Replace Filter & Pump on Gen 4 VW Audi Seat Skoda

02248 – Valve for Controlling Clutch Operating Angle (N373) – 014 Defective – Intermittent
00448 – Haldex Clutch Pump (V181) – 002 – Lower Limit Exceeded – Intermittent
01155 – Clutch – 003 – Mechanical Failure – Intermittent
00448 – Haldex Clutch Pump (V181) – 011 – Open Circuit – Intermittent
02248 – Valve for Controlling Clutch Operating Angle (N373) – 012 – Electrical Fault in Circuit
01155 – Clutch – 003 – Mechanical Failure – Intermittent
01324 – Control Module for All Wheel Drive (J492) 004 – No Signal/Communication
65535 – Internal Control Module Memory Error 00-10 – Intermittent
16347 – Control Module – EEPROM error – 014 – Defective – Intermittent
00003 – Control Module 014 – Defective – Intermittent / Control module faulty sporadic

For further information, please see our Gen 4 Haldex Troubleshooting Guide.

The most common fault with these vehicles is caused by a clogged internal oil filter which burns out the motor inside the pump. We stock Generation 4 pumps, oil and filters to offer a same day dispatch.

The filter is removed by using the oil pumps pressure to push out the filter cartridge, but if the pump does not work you first have to replace the pump and oil.

Once the filter has been replaced you then refill the unit with oil. These ECU’s do also corrode, and unfortunately they give the same fault symptoms for both corrosion and pump failure making unskilled or inexperienced accurate diagnosis difficult. We offer the Mail Order testing and repair service for ECUs/controllers giving you the ability to fix your Gen 4 vehicle effectively.

This list is not definitive, and be cautious on the dates as cars around the change over date may have ether Gen 4 or Gen 5:

• Audi A1 2015 onwards
• Audi A3 S3 RS3 / Sportback 2013 onwards
• Audi A3 Cabriolet 2014 onwards
• Audi Q3 2012 onwards
• Audi TT / TTS / TTRS Coupe/Roadster 2014 onwards
• Volkswagen Golf / Golf R / 4Motion 2013 onwards
• Volkswagen Passat / 4Motion / Santana 2015 onwards
• Volkswagen Sharan / syncro / 4Motion 2012 ownards
• Volkswagen Tiguan 2013 onwards
• Seat Alhambra 2012 onwards
• Seat Leon / Leon 4 2013 onwards
• Seat Altea Freetrack 2014 onwards
• Skoda Octavia / Scout 2013 onwards
• Skoda Yeti 2013 onwards

For further information, please see our Gen 5 Haldex Troubleshooting Guide.

When scanning the vehicle for fault codes, it is important to use some decent scanning system which can actually communicate with the Haldex control module which is “22 AWD”, otherwise you will find there is no fault codes stored! People often fall into this trap with cheap OBD2 code readers or phone apps. Fault codes which often occur are:-

• 131599 – All Wheel Drive Clutch – U0114 00 [009] – No Communication (typically ECU fault)
• 131599 – Control Module for All Wheel Drive Clutch – C1113 07 Intermittent error (typically ECU fault)
• 16670 – All-Wheel Drive – C1113 07 [008] – Mechanical Failure (typically pump type fault OR/AND transfer box)
• 16671 – Pump for Haldex Clutch – C1112 04 [008] Internal System Fault (faulty pump AND ecu needs repair)
• 16671 – Haldex clutch pump Faulty – C1112 04 passive/sporadic (faulty pump AND ecu needs repair)
• 16668 – Pump for Haldex Clutch C1112 07 [008] – Mechanical Failure Intermittent (typically Pump fault)
• 16666 – Pump for Haldex Clutch C1112 13 [008] – Open Circuit(typically pump type fault)
• C111307 – Mechanical Malfunction – Passive / Sporadic (typically blocked pump, clean out and relearn or transfer box)

For further information, please see our Gen 5 Haldex Troubleshooting Guide.

It is common for owners to have a new pump fitted by a garage or main dealer and still the problem persists. When fitting a pump, or even just after a clean out and service it is essential to carry out the “pump learn” function in the “basic settings” of the Haldex control unit.

VCDS/VAGCOM can do this and so can the main dealer ODIS system. Customers are often told there is “no adaption” or programming required to fit a new pump, this is incorrect!

Please see our Gen 5 Haldex Troubleshooting guide here for full instructions on the “pump learn” function.

You can also watch our Youtube video here: https://www.youtube.com/watch?v=ldzkXe93PMs

The easiest way to resolve Gen 5 Haldex faults is to get the ECU removed from the vehicle and send it to us via Royal Mail Special delivery for a same day test and repair service.

Click Here To Order Generation 5 Haldex Repair Service