Slough's specialists in
ECU Remapping.
Custom-written ECU maps on our 4WD dyno. Real power, smoother drive, often better MPG. No nonsense. No hidden prices. Book in today.
⭐⭐⭐⭐⭐ 4.9 out of 5 from 500+ Google reviews. Trusted by drivers across Slough since 2019
- ✓6 months interest-free, up to £3,000
- ✓Same-day slots available in Slough
- ✓In-house rolling road dyno
ECU remapping at Onyx in Slough is written for your car on our 4WD dyno, not flashed off a USB stick. The reason matters: a generic Stage 1 file written for a German-market car with 95 RON fuel and cold air does horrible things to a UK car running 99 in August on the M4. Our technicians log AFR, knock, boost and EGT live on the rollers, then road-test before you collect. If the figures aren't right, we don't hand you the keys.
Why book ecu remapping with Onyx in Slough?
- Written on our dyno. not downloaded. Your engine, your fuel, your gearbox.
- AFR and knock monitored live. we see what the ECU is doing under real load.
- Stage 1 to Stage 3. matched to whatever hardware is actually on the car.
- Before and after print-out. you take the dyno sheet home.
- Spread it over 6 months. interest-free up to £3,000. First instalment at booking, five more monthly.
The cars we map
A typical week brings in a Golf R from Maidenhead chasing 380 reliable bhp on E10, an F87 M2 from Gerrards Cross that came to us after a bad off-the-shelf file gave it pinking on hot days, and a steady stream of Audi RS3s and BMW M340is from the Heathrow side. Past the daily fast stuff we map serious metal too. 911 Turbos, Huracáns, Aston Vantages, Continental GTs. Each one gets cell time, not a five-minute flash in the car park.
The risk of a cheap remap is invisible until it isn't. Lean spots at full boost cook ring lands. Over-aggressive ignition advance picks up detonation on a warm day and you find out at the side of the road. We map conservatively where it matters and aggressively where it's safe. That's why our maps last.
Drop the car off in the morning, leave it with us for the day. Waiting area has WiFi and coffee if you'd rather stay.
Serious about a map? Call 01753 439115 or WhatsApp 07393 580281 with your car, mileage, mods and what you're after. Call 01753 439115 or WhatsApp 07393 580281.
ECU Remapping in Slough and across Berkshire
Onyx Autocentre is based in Slough, Berkshire and we look after cars from across the SL postcodes every day. Whether you're driving in from central Slough, Colnbrookor Windsor, we'll book your ecu remapping around your schedule. Same Slough workshop, same trusted team, same standard on every ecu remapping job.
Common ecu remapping jobs we see at our Slough workshop
All our services
Every service we offer at our Slough workshop. Tap a tile to find out more.
- Air Bag RepairsFind out more
- Alloy Wheel Crack WeldingFind out more
- Alloy Wheel RefurbishmentFind out more
- Alloy Wheel WeldingFind out more
- Auto ElectricsFind out more
- Body Kit FittingFind out more
- Boost Leak & Smoke TestFind out more
- CambeltsFind out more
- Car Air ConditioningFind out more
- Car BatteriesFind out more
- Car BrakesFind out more
- Car ExhaustsFind out more
- Car ModificationsFind out more
- Car RepairsFind out more
- Car Safety ChecksFind out more
- Car ServicingFind out more
- Car TyresFind out more
- Carbon CleaningFind out more
- Cheap Car TyresFind out more
- Clutch ReplacementFind out more
- Diesel Performance ECU TuningFind out more
- Diesel TuningFind out more
- Dyno TestingFind out more
- ECU RemappingFind out more
- Engine DiagnosticsFind out more
- Engine ManagementFind out more
- Engine RebuildsFind out more
- Engine TuningFind out more
- Fleet MaintenanceFind out more
- Gearbox ServicingFind out more
- Gearbox TCU RemappingFind out more
- Haldex ServicingFind out more
- Head Gasket RepairsFind out more
- In-Car EntertainmentFind out more
- Mechanical RepairsFind out more
- MOT Failure RepairFind out more
- Nitrogen Oxide (NOx) Sensor RepairsFind out more
- Number PlatesFind out more
- Oil & Filter ChangeFind out more
- Parking SensorsFind out more
- Powder Coating for Alloy WheelsFind out more
- SteeringFind out more
- SuspensionFind out more
- Timing Belt ReplacementFind out more
- Trade Alloy Wheel RepairFind out more
- Turbo Intake CleaningFind out more
- Van Repairs & ServicingFind out more
- Vehicle SecurityFind out more
- Wet Belt ReplacementFind out more
- Wheel BalancingFind out more
- Window TintingFind out more
What Our Customers Say
Rated 5 Stars on Google by drivers across Slough and Berkshire
"Took my BMW here for an oil change and oil filter and the service was spot on. Really friendly team, got the car booked in quickly and the job was done properly with no hassle."
"Highly recommend this garage. After contacting a few other garages who didn't want to take my car in for diagnostics, these guys were happy to help. They diagnosed and fixed an engine fuel leak issue professionally and efficiently. Great service and very reliable. I'll definitely use them again."
"Very nice experience at Onyx — they took me in immediately and completed the DRL module swap efficiently. I have no regrets and would highly recommend."
"I brought my car to Onyx after visiting many other mechanics who failed to sort out issues with my vehicle. The mechanics here clearly explained the issues with the vehicle and fixed them quickly. Amazing service and wonderful people, highly recommend."
"These guys are always polite and welcoming. I've taken multiple vehicles here and the service received has been excellent."
"Had the front pads done here over the weekend. Second time in with Onyx and service has been top notch both times. On time, no hassle and cost effective. Highly recommend."
"Max and Ben are extremely professional and did an excellent repair on my wife's car at a great price. Max spotted the problem within 6 hours, which 2 other garages could not detect."
"I took my car to Onyx and met Ben who was friendly and I got the problem diagnosed by Ben which I had a faulty water pump. I was quoted a reasonable price and got it replaced. I was satisfied and would recommend Onyx."
"Great service, sorted out my alloy refurb at a good price and quick turnaround. Top service, highly recommend."
"A great experience with Onyx who fitted a new clutch for my Fiat 500. Super quick, friendly and well priced. Would highly recommend."
"Very friendly, no hassle effective service. Definitely recommend and will use when I need to get my alloy wheels refurbished."
"Brought my Audi S3 in for a coolant leak — the part was on back order but they managed to source one in a couple of days. Massive thanks to Ben."
"My vehicle went in for a brakes job and Ben and the team at Onyx Autocentre did an amazing job. Highly recommended."
Spread the cost over 6 months, interest-free.
Big bill? Pay the first instalment when you book, then spread the rest across up to 5 more monthly instalments, interest-free. Available on jobs up to £3,000. No setup fees, no hidden interest. FCA-authorised through Payment Assist, soft credit check, decision in minutes.
- ✓ Up to 6 months interest-free
- ✓ Available on jobs up to £3,000
- ✓ First payment at booking, rest split monthly
- ✓ Soft credit check, decision in under 2 minutes
- ✓ No setup fees, no hidden interest
Specialist ecu remapping pages
Stage 1 ECU remap on our in-house 4WD dyno in Slough. More power, more torque, better MPG, fully reversible. Berkshire's tuning specialists. Call 01753 439115.
BMW N47 (2.0d) and N57 (3.0d) diesel remapping in Slough. Torque-focused maps for 320d, 520d, 330d, 530d, X5 30d. Dyno proven, EGR and DPF retained.
PD TDI and CR TDI remapping in Slough for VW Golf, Passat, Audi A3, A4, A6 across Berkshire. Dyno proven, honest gains, fully reversible.
Ford Ranger and Transit 3.2 TDCi remap in Slough. More torque for towing, smoother shifts, better real-world MPG. Berkshire's 3.2 TDCi specialists.
Economy ECU remap in Slough for high-mileage cars and vans across Berkshire. Real MPG gains, smoother drive, fleet welcome. Call 01753 439115 today.
Gearbox TCU remapping in Slough for DSG, S Tronic and ZF 8HP. Faster shifts, full launch, raised torque limit. Pairs with Stage 1 or 2. Call 01753 439115.
Other services you might need
Air-bag warning fixes, crash data resets and module repair.
TIG-welded cracked alloy repair in Slough. Pothole and impact damage put right by certified welders.
Diamond cut, full colour change and kerb-damage refurbs.
Cracked alloy welding, straightening and TIG repair.
From dead batteries to CAN-bus faults. We trace it, we fix it.
Boost leak and EVAP smoke testing in Slough. We find the split hose, cracked charge pipe or dodgy valve in minutes.
Same-day slots are limited this week.
Call or WhatsApp now and get ecu remapping today. Slough, Langley, Colnbrook, Windsor, Maidenhead, Uxbridge and Gerrards Cross.