ECU Repairs is a UK engine ECU repair specialist. We test, decode, repair and recondition engine ECUs, ECMs and PCMs at component level, diagnosing the specific fault on the circuit board rather than replacing the whole unit. Because the original unit is repaired instead of swapped, it keeps its factory coding, immobiliser pairing and security relationship with your vehicle, so there is no reprogramming and no dealer visit needed when it goes back on.
This page is the directory to that service. Below you will find every vehicle make we cover, each with its own hub, alongside a plain explanation of how our repair-and-return process works and what to expect. If you already know the make you are dealing with, go straight to its section. If you are not certain a particular unit is covered, our engineers confirm it before any work begins.
Engine ECUs only — a single, deliberate focus
We repair engine control units, and that is the whole of what we do. Every unit that comes through the workshop manages the engine itself: fuelling, ignition timing, boost control, injector operation and the sensor network that keeps combustion running correctly. Whether it is badged as an ECU, an ECM or a PCM, if it runs the engine, it is what we repair — across petrol, diesel, hybrid and direct-injection systems.
Keeping to one class of unit is a deliberate choice. Our engineers see the same fault families again and again across different manufacturers — failed injector drivers, corrupted EEPROM memory, dry solder joints, failed voltage regulators and CAN bus transceiver faults — so diagnosis is faster and more certain than it would be for a general repairer spread thin across every part of the car. If a unit falls outside engine management, we tell you honestly rather than take on work beyond our specialism.
How our repair-and-return service works
The service is mail-in and covers the whole of the UK by deliberate choice. You send the unit to our workshop, we do the rest, and it comes back ready to refit. The process is the same whichever make you drive:
- Booked in and logged. Your unit is recorded on arrival and matched to your vehicle details and the fault you have described.
- Inspected and tested. It is visually examined under magnification, then electrically tested to confirm the fault rather than assume it.
- Diagnosed and quoted. We identify the specific component or memory fault, then contact you with the outcome and an estimated repair price. No chargeable work starts without your authorisation.
- Repaired at component level. The failed parts are replaced using temperature-controlled rework equipment, under microscope where the work is fine, so the board is restored rather than substituted.
- Final tested and returned. A repair is not finished until it passes final testing. The unit goes back to you retaining its original coding and immobiliser pairing, ready to fit with no reprogramming.
Because the original ECU is repaired, there is no need to source a second-hand unit, no security re-sync at a dealer and no risk of a mismatched replacement. Every repair is covered by a 24-month warranty on the specific work carried out.
Vehicle makes we repair
We repair engine ECUs across European, Japanese, Korean and American manufacturers, from small city cars through to performance models, vans and 4x4s. Each make below has its own hub with model and part-number detail, and our technical team confirms coverage for a specific unit rather than guessing. Select your manufacturer to see the units we handle:
German marques
Precision engine management across Audi, BMW, Mercedes-Benz, Porsche and Volkswagen petrol, diesel and direct-injection ECUs.
Audi · BMW · Mercedes-Benz · Porsche · Volkswagen
French marques
Common-rail diesel and petrol engine ECUs for Citroën, Peugeot and Renault.
Italian marques
Engine ECUs for Alfa Romeo and Fiat passenger cars and Iveco commercials.
Alfa Romeo · Fiat · Iveco
Japanese marques
Engine control units for Honda, Mitsubishi, Nissan and Suzuki across petrol and diesel ranges.
Honda · Mitsubishi · Nissan · Suzuki
Korean marques
Engine ECUs for Daewoo, Hyundai and Kia across the range.
Swedish marques
Saab and Volvo engine control units, including turbocharged applications.
British and light-commercial marques
Engine ECUs for Ford, Land Rover, LDV, Rover and Vauxhall/Opel cars and vans.
Ford · Land Rover · LDV · Rover · Vauxhall/Opel
Spanish and Czech marques
Volkswagen Group engine ECUs for Seat and Škoda.
American marques
Engine control and powertrain modules for Chrysler.
Not seeing an exact match, or unsure which unit your vehicle uses? Start with our main engine ECU repairs hub, or get in touch and our engineers will confirm coverage for your specific part number.
Why owners and garages send their ECUs to us
Every unit is repaired in-house, by our own engineers, in our own UK workshop, on our own equipment — no outsourcing, no subcontracting and no overseas processing. The person diagnosing your ECU is the person repairing it, and the repair is accountable to us alone.
- Repair, not replace — your original unit is restored, so it keeps its factory coding and immobiliser pairing.
- No reprogramming on refit — the repaired ECU fits straight back with no dealer visit or security re-sync.
- Component-level diagnosis — we repair the fault on the board, not just mask the symptom.
- 24-month warranty — every repair is covered on the specific work carried out.
- UK-wide mail-in — send your unit from anywhere in the country and we return it ready to fit. See ECU repair in London for London and the South East.
- Trade and retail alike — independent garages and individual vehicle owners are equally welcome.
Getting your engine ECU repaired
If you have identified a faulty engine ECU, or a diagnostic trouble code points to the control unit rather than a sensor, the next step is to have it properly tested. We diagnose the unit first, then contact you with the outcome and an estimated repair price before any chargeable work begins — so you decide with the facts in front of you.
Complete the repair form to have our engineers confirm coverage and diagnose your unit, or get in touch to check your make and part number before you send it in.