Over 50 years of automotive electronics expertise, focused entirely on engine ECUs
ECU Repairs is a UK-based engine ECU repair specialist. We rebuild, remanufacture and repair engine control units and engine management electronics for cars, vans, light commercials and 4x4s across every major manufacturer. Every unit is worked on in our own workshop by our own engineers, returned with a 24-month warranty, and supported by a heritage in automotive electronics that goes back to 1972.
Our story
Our roots go back further than most workshops you’ll come across. In 1972, we founded Power Steering Services, a specialist remanufacturing operation focused on hydraulic and electro-hydraulic steering systems. That business gave us decades of hands-on experience with the kind of mixed mechanical and electronic systems that were beginning to define modern vehicles.
As engine management technology matured through the late 1970s and into the 1980s — Bosch Motronic, early Lucas systems, the first generation of digital engine ECUs — we saw a clear pattern emerging. Workshops were comfortable changing parts, but very few had the skills, equipment or willingness to actually repair the electronics inside them. Faulty ECUs were almost always replaced rather than repaired, often at significant cost to the vehicle owner, and often with refurbished or used units of unknown history.
That gap is what led us to found ECU Repairs. Where Power Steering Services solved a remanufacturing problem on the hydraulic side, ECU Repairs was set up to solve the same problem on the electronics side: testing, diagnosing and component-level repair of engine ECUs as a genuine alternative to outright replacement. Decades later, that’s still exactly what we do — only the technology, tooling and vehicle complexity have moved on.
What we do
We focus specifically on engine ECUs and engine management electronics. That includes:
- Engine Control Units (ECUs), Engine Control Modules (ECMs) and Powertrain Control Modules (PCMs)
- Engine management electronics across petrol, diesel, hybrid and direct-injection systems
- Associated engine electronic control modules where coverage is confirmed by our technical team
Coverage is broad — we work on units from European, Japanese, Korean and American manufacturers, on vehicles ranging from small city cars through to performance models, vans and 4x4s. If you’re not sure whether your specific unit falls within scope, the right next step is to complete the Repair Form on our website. Our technical team will confirm coverage rather than guess at it, which protects you from sending a unit in for a service we can’t deliver.
How component-level repair differs from replacement
This is the part that matters most, and it’s worth being clear about. When an engine ECU develops a fault, there are broadly three routes available to a vehicle owner:
Replace with a new unit from the dealer. Often the most expensive route. New units typically need coding, programming or pairing to the vehicle, which adds further cost and dealer time. For older vehicles, a new unit may not even be available.
Fit a used or refurbished unit from a breaker or third party. Cheaper, but the unit’s history is rarely known, security and immobiliser pairing can be problematic, and there’s no meaningful warranty on the underlying electronics.
Repair the existing unit at component level. This is what we do. Rather than replacing the whole ECU, we diagnose the specific fault — a failed injector driver, a corrupted EEPROM, dry joints on the main board, a damaged voltage regulator, a failed CAN bus transceiver, water-damaged tracks — and repair only what’s actually wrong. The unit goes back into the vehicle as the original ECU, retaining its original coding, immobiliser pairing and security relationship with the vehicle.
For most engine ECU faults, component-level repair is the most cost-effective and lowest-risk route. It avoids the coding and pairing complications that come with a replacement unit, and it keeps the vehicle’s original electronics in service.
Our engineers and our workshop
Every repair is carried out by our own engineers, in our own UK workshop, on our own equipment. We don’t outsource diagnostic work, we don’t subcontract repairs, and we don’t ship units overseas for processing.
Our engineers work to a structured diagnostic process: each incoming unit is logged, visually inspected, electrically tested, and then taken through fault-specific diagnostic procedures depending on the symptoms reported and what the testing reveals. Component-level repair work is carried out under microscope where required, using temperature-controlled rework equipment appropriate for modern multi-layer boards and surface-mount components. Where firmware integrity is part of the fault picture, EEPROM and flash memory work is handled in-house.
The workshop has invested in the test equipment, vehicle-specific test benches and reference units needed to verify repairs end-to-end before a unit goes back to a customer. A repair isn’t considered complete until the unit has passed final testing — not just visual or basic electrical checks.
How we work with customers
ECU Repairs operates as a mail-in service. We don’t take walk-ins, and we don’t run a customer-facing reception. That’s a deliberate choice: it keeps the workshop focused on repair work rather than counter traffic, and it lets us serve customers across the entire UK on equal terms.
The process is straightforward. You complete the Repair Form on our website with your details, the vehicle, the unit and the symptoms. You send the unit in via tracked and insured courier to our workshop. Our team tests and diagnoses the fault, then contacts you with the outcome and the estimated repair price before any chargeable work begins. Nothing is repaired without your authorisation.
If a unit is found to be beyond economical repair, we’ll look first at sourcing a replacement unit where possible. Replacement parts are special-order and pricing depends on supplier availability, so we’ll always confirm with you before committing. If you’d prefer not to proceed, the unit comes back to you — we never dispose of customer property without explicit consent.
Turnaround is fast, but every job is different. If timing is critical for you, get in touch and we’ll discuss your specific repair.
Warranty and standing behind our work
Every repair carried out by ECU Repairs is covered by a 24-month warranty. The warranty covers the specific repair carried out — not new or unrelated faults that develop later — and it’s non-transferrable, which means it doesn’t carry over to a new owner if the vehicle is sold.
That warranty matters for two reasons. First, it tells you we stand behind what leaves the workshop. Second, it gives you a clear, honest picture of what’s covered and what isn’t, which is more useful than vague reassurance.
Why customers choose us
We won’t make claims we can’t back up, but a few things genuinely set us apart:
- Specialism. Engine ECUs and engine management electronics are our focus. We’re not a general auto-electrical workshop that handles ECUs as a sideline.
- Heritage. The same ownership and operational discipline behind ECU Repairs has been running specialist automotive remanufacturing operations since 1972.
- Component-level repair. We repair what’s actually faulty rather than swapping units wholesale.
- In-house engineers. Every job is handled by our own team, in our own workshop, on our own equipment.
- Transparent process. Test, diagnose, contact you with the outcome and estimated repair price, then proceed only on your authorisation.
- 24-month warranty. Standard on every repair.
Get in touch
If you’ve got a faulty engine ECU and you’d like our team to take a look, the best place to start is the Repair Form on our website. That gives our engineers everything they need to confirm coverage and prepare for your unit’s arrival.
For general enquiries, you can reach us at support@ecu-repairs.com or via the contact page at https://www.ecu-repairs.com/contact/.
Send your unit to:
ECU REPAIRS Unit 102 Heaver House 12 East Street, Epsom Surrey, KT17 1HX United Kingdom