Car Diagnostics | Book a Car Diagnostic for your Vauxhall

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a car diagnostic?

With RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage. They can do a vehicle diagnostic check on your driveway, so you don't even need to leave the house.

When it comes to diagnosing issues with your vehicle, our friendly expert mechanics are here to help. We use state-of-the-art diagnostic equipment to accurately identify any problems, ensuring your vehicle runs smoothly and safely. The price includes the diagnostic service – no hidden costs. Just friendly, honest experts.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick for your Vauxhall

We’ll come to you at home or work

RAC Mobile Mechanic for your Vauxhall

At the RAC, we’ve got over 125 years’ experience in offering complete peace of mind to our members. We’re best known for our breakdown service. And now – our new RAC Mobile Mechanics are here to help make every day motoring easier. If you need a service or repair, they’ll come to you at your home or work.

Book a car diagnostic

Our mobile mechanics will spend up to 30 minutes checking your car for faults and talk you through any repairs you might need and give you a report for your records. Plus, when we’ve diagnosed the problem get £50 off mobile mechanic repairs over £150 – for a limited time only. ^†T&Cs apply. Offer ends 17/08, 23:59.

OEM quality parts

We use original equipment manufacturer (OEM) standard parts, which means every new part will be the same standard and same quality as the original part it replaced.

Mechanics you can trust

Our mobile mechanics are friendly, honest, and backed by the RAC.

Close up of an RAC Mobile Mechanic running a vehicle diagnostic check

Book a repair

It’s easy to book a car repair online. We bring the garage to you with RAC Mobile Mechanics, or find a trusted local garage. Common repair jobs include:

Clutch Replacement

We diagnose and repair clutch issues – whether your clutch is heavy or slipping, or you’re having trouble changing gears.

Alternator repair

We check and correct alternator faults to keep your charging system running smoothly.

Oil change

Oil is vital to a healthy engine, so it’s important to change it regularly.

Brake pads & Discs

If your brakes are making noise or you’re noticing reduced stopping power, it’s likely time to replace your brake pads or discs.

And it’s not just car diagnostics that we do for your Vauxhall

Mobile mechanics bring the garage to you, saving you the hassle of getting your car to a garage. If you need a service or repair, they’ll come to you at your home or work.

A close up of an RAC mobile mechanic looking under the hood of a car

Try one of our RAC Approved Garages

View all garages

4 Fab Wheels

4.6/5

4 Fab Wheels is a newly formed company based in the heart of Wembley. We own a very large garage which includes a tyre bay, an in-house car wash and valet bay and a bodyshop/accident section complete with a jig and spray paint booths. We also have on-site storage facilities for up to 80 vehicles. Our team of 10 technicians (6 bodywork, 4 mechanical) are all fully qualified and very experienced in their specific field. We have specialist knowledge of German, English and Japanese vehicles, however we do work on all makes and models on a daily basis. We guarantee all work, and can offer customer a collection and delivery service at an additional cost within 20 miles, as well as the use of our comfortable waiting room which has Wi-Fi and refreshments available.

Four Fab Wheels, 12 Craven Park Mews, London, NW108SS

T & K Motors

4.9/5

T&K Motors have been established for more than 30 years and are a helpful friendly garage, we carry out MOT’s, servicing and mechanical repairs on all makes and models of vehicles. We pride ourselves on offering main dealer quality of work, at independent prices, whilst ensuring that your warranty remains intact by using genuine or manufacturer approved parts, and are usually able to save you over 60% in price comparison. Our mechanics are fully qualified with many years of experience behind them in the motor industry, who take great pride in their work. Our services include the following; • All makes serviced to manufacturer's specification • MOT VOSA class 4 and 7 Car and Light Commercial • Air Conditioning re-charge and leak testing • Batteries/Alternators checked and replaced • Brakes pads and discs, brake fluid changes • Clutch replacement and repair • Cylinder Head repairs • Engine management light diagnostics • Exhausts repaired and replaced • Free vehicle health check • Fuel injection diagnostic/repair • Oil and filter changes • Suspension spring replacement specialists • Timing belts and water pump replacement • Tyres fitted, balanced and aligned • Van servicing and repairs • Free Vehicle diagnostic checks • Welding repairs to MOT standard • Warning lights diagnosed and reset * Car Service, Van Service, Commercial vehicle service

47-53 Green Street, Ayr, KA88BQ

CRS Garage & MOT Centre

4.6/5

...We are a family run business with over 30 years experience in the vehicle repair & maintenance industry. Our main focus is our customers & their needs. We also have another garage based in Uphall, Broxburn, West Lothian.

9D Inchmuir Road, Whitehill Industrial Estate, Bathgate, EH482EP

Weston Auto Centre

4.4/5

We are a family run garage, we put our customers first. Check out our reviews on the best of cannock and our facebook page

Unit 6 Bennick Industrial Estate, Broad Street, Bridgtown, WS11 0DA

Performance 3000 RAC Yeovil

4.8/5

Performance 3000 are the RAC approved garage for Yeovil and the surrounding areas in Somerset. • We use Bosch KTS (some of the most advanced equipment in the world) as our primary source of diagnostic equipment. • We only fit genuine Bosch or original specification equipment • We work to approved and audited codes of practice • Our Code of Practice is approved by the Trading Standards Institute • Our technicians are comprehensively trained by Bosch • We only ever carry out work with your permission • We provide a quotation before we start any work • We keep your old parts so that you can see that the work was necessary • We use industry approved times when calculating how much labour to charge so that you know the price you pay is fair • Our technicians are comprehensively trained and document every procedure. • We are able to assist with the collection and return of vehicles, wherever possible We offer services which other garages and main dealers are unable to: • Our in-house rolling road enables us to diagnose and test vehicles in our workshop just as if they were driving along a road • We hand-make stainless steel exhaust systems on your car whilst you wait • Our in-house machine shop allows us to fabricate various items on-site

40 Buckland Road, Pen Mill Trading Estate, Yeovil, BA21 5HA

Frequently asked questions on car diagnostics

How much does it cost to diagnose a car problem?

The cost you pay can vary depending on the type of car and how complicated the diagnostic test. Check with your mechanic for a quote.

Is a car diagnostic test worth it?

Yes, a diagnostic test may save you a lot of money. It finds issues early before they become costly repairs. It can also keep your vehicle running efficiently and safely

Can I do a car diagnostic myself?

While you can buy a diagnostic tool, interpreting the results needs expertise. It’s best if you to have a professional mechanic perform the test.

How long does a car diagnostic test take?

Diagnostic tests take from 30 minutes to a few hours. This depends on what issues are being looked at.

What are common car diagnostic codes?

Common diagnostic trouble codes include:

P0300: Random/Multiple Cylinder Misfire Detected
P0420: Catalyst System Efficiency Below Threshold
P0171: System Too Lean (Bank 1)

These are general examples, so your car may have different codes. Always check with a mechanic so you get an accurate diagnosis.

Is a car diagnostic test necessary for a service?

Yes, they are. Regular diagnostics can help keep your car in good health. It makes sure that underlying issues are addressed quickly, so you can drive with peace of mind on the road.

Again, keep in mind that mechanics might have their own checklists. Chat with your mechanic to be sure that they address any specific issues you have.