MOT failure repair in
Slough.
Failed your MOT? Send us the sheet on WhatsApp and our Slough workshop will tell you what it costs, fix it the same day where we can, and book the retest for you across Berkshire. 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
- ✓Free re-check after the repair
The honest bit about MOT failures
An MOT failure isn't a disaster, it's a list. Some test centres lean into the list with parts they happen to sell. The team at Onyx Autocentre in Slough looks at the actual fail items, separates the dangerous from the cosmetic, and tells you what genuinely needs doing to pass the retest. Nothing more, nothing padded.
The failures we fix same-day, every week
- Emissions. Petrol high CO or HC and diesel smoke. Usually a dirty MAF, a stuck-open EGR, a lazy lambda sensor, a clogged cat or a DPF that hasn't seen a long enough run to regenerate. Real diagnostics, not a wave of parts.
- Brakes. Pads, discs, rusted calipers, ABS warning lights, handbrake imbalance. OEM-approved parts, fitted properly, balanced left to right.
- Suspension. Anti-roll bar drop links, ball joints, perished bushes, leaky shocks. Common fails on every Audi A4, BMW 3 Series, Focus and Range Rover Sport that comes through.
- Headlight aim and bulbs. Sounds trivial. Reset on the beamsetter, fit a matched pair of bulbs, MOT passed.
- Tyres. Below 1.6mm, cuts, bulges, mismatched rolling radius across an axle. We stock budget to popular premium brands.
- Wipers and washers. Cheapest fail item there is. Genuinely takes minutes.
What happens when you bring the car in
Bring the fail sheet, or photo it on WhatsApp before you come. One of our technicians goes through it line by line, agrees the work in writing, gets stuck in. When the job is finished we run the car back to the test centre for the retest, often inside the 10-working-day partial retest window. The new pass certificate is sent straight to you.
Drivers come to us from Slough, Langley, Colnbrook, Windsor, Maidenhead, Datchet, Hayes, Uxbridge and Gerrards Cross every week because we don't pad the bill and we don't fit cheap pattern parts on safety-critical work. Five minutes off M4 J5, SL3 7EW.
Failed your MOT? Call 01753 439115 or WhatsApp the team at Onyx Autocentre on 07393 580281 with a photo of the sheet and we'll quote today.
Want a free pre-MOT check before your test? See our car safety checks page.
MOT Failure Repair 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, Langleyor Colnbrook, we'll book your mot failure repair around your schedule. Same Slough workshop, same trusted team, same standard on every mot failure repair job.
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."
"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."
"My vehicle went in for a brakes job and Ben and the team at Onyx Autocentre did an amazing job. Highly recommended."
"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."
"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."
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
Same-day slots are limited this week.
Call or WhatsApp now and get MOT failure repair today. Slough, Langley, Colnbrook, Windsor, Maidenhead, Uxbridge and Gerrards Cross.