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Diagnostics
Expert solutions, not guesswork
Modern vehicles need precise tooling and an experienced eye. We pinpoint the issue first, so you only pay for the work that's actually needed.
Diagnose issues with precision
Save you from unnecessary expenses
Expert wiring harness inspection with thermal imaging
Skilled sensor and module diagnostics
Repairs & Installations
Fix what's broken, upgrade what isn't
From dead batteries and dashboard warnings to Apple CarPlay, reversing cameras and audio upgrades — we repair faults and install in-car tech properly, coded to your vehicle so it just works.
- A/C & heating fixes — comfortable cabin, year-round
- Alternator & starter repairs, typically in 2–4 hours
- Apple CarPlay & Android Auto retrofits on stock screens
- Multimedia head units, reversing cameras & dash cams — fitted and coded
- Wiring harness repair & replacement by trained auto-electricians
- Dashboard, instrument cluster & warning-light faults sorted
- Whole-car electrical troubleshooting — all makes and models
Diagnosis
Book an electrical diagnostic
Tell us a bit about the fault. We use thermal imaging and module-level scanning to pinpoint the issue first — so you never pay for parts you don't actually need.
- Honest, fixed-price quote before any work
- Initial inspection
- OEM or trusted aftermarket parts
- Most repairs completed same day
Reviews
What our customers say
4.7 / 5· 68 Google reviews
Kel Carvalho
in the last week
bozhidar ivanov
a week ago
Excellent, very fast service. So happy, definitely I'll use them again. Thanks,Boss ( Boz).
Wojciech Kamiński
a week ago
I highly recommend Diamond Garage! I've been looking for a reliable mechanic for ages and finally found the right place. The customer service is excellent – true professionalism and great knowledge. Everything was explained clearly before any work started, with no pushy sales tactics or hidden costs. Best of all, the prices are very affordable and completely fair given the top-quality work. I'll definitely be coming back!"
Help center
Frequently Asked Questions
Everything you need to know before booking your visit.
Do you work on all makes and models?
Yes! We work on domestic and foreign vehicles — cars, SUVs and light trucks.
Can I wait while my car is being fixed?
Absolutely! We have a clean waiting room with free coffee and Wi-Fi.
Do you use original parts or aftermarket?
We use high-quality OEM or trusted aftermarket parts depending on your preference and budget.
How long do repairs usually take?
Small jobs (oil changes, brake pads) can be done the same day. Bigger repairs may take longer — we always give you an estimate up front.
Can you diagnose electrical faults and warning lights?
Yes. We carry out full auto-electrical diagnostics — dashboard warning lights, wiring faults, ECU and sensor issues, alternators, starters and A/C electrics. We pinpoint the cause first so you only pay for the actual fix, and we also install CarPlay, reversing cameras and dash cams.
Find us
Visit us at
Drop by during opening hours, or call ahead to book a slot.
Diamond Garage
Open now180c Queens Drive Walton, L4 6XD
- Opening hours
- Mon–Fri: 9AM–6PM | Sat: 9AM–1PM | Closed Sunday