Book a Car Diagnostic in Chippenham

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 in Chippenham

We’ll come to you at home or work

RAC Mobile Mechanic in Chippenham

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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.

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

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. There are various ways we can check for faults, which could include plugging in to check your car’s onboard engine management system.

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.

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.

Average cost of a vehicle diagnostic by car make^

The RAC charges a flat rate for the cost of a car diagnostic but prices may change due to inflation. According to RAC data, the average cost of a car diagnostic is £87.

Make	Average price
Ford	£105
Vauxhall	£105
Volkswagen	£105
Peugeot	£104
Mercedes-Benz	£104
Nissan	£106
BMW	£107
Audi	£106
Renault	£104
Citroen	£104

^Average price quoted for RAC Mobile Mechanics from 01/01/25 to 31/03/25.

And it’s not just car diagnostics that we do in Chippenham

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

Autocare MOT Centre

Riverway Trading Estate, Trowbridge, BA14 8LL

Cross Street Garage Swindon Transfer Bridge

We are a family run independent garage that has been established for over 40 years. We take pride in our service and repairs of all make vehicles and always endeavour to keep our customers happy. Our Services include Servicing, Mot Including Vans, General Repairs, Cambelts, Engine and Gearbox repairs, Air con servicing, Terraclean, Tyres and we also have car sales with a large stock. We also operate a Recovery service with an 8-mile radius of Swindon Town centre. Our opening times are from 0800 hours to 1730 Monday to Friday. Stuck for transport we can also keep you mobile as we provide Courtesy cars subject to availability, we also have a collection and delivery service within a 5-mile radius of Swindon Town centre. We also provide payment plan over 4 months which is interest-free and no credit check up to £1000.00. Other payments include cash, debit and credit cards.

Unit 1, Transfer Bridge, County Road, Swindon, SN12EL

Automax Swindon

Automax is a local business in Swindon which was established in 2009 by Tomasz Kremer. Tomasz and his team have several years of experience in the motor trade with a passion for the automotive world who provide a very high level of service, where customer satisfaction takes first place. In our garage in Swindon we employ experienced professionals and will carry out a quick and accurate diagnosis of faults and follow with reliable repair. Our team will be happy to service your vehicle periodically to ensure the vehicles longevity. We keep up to date with new technology to maintain the highest standard of services at affordable prices to suit all vehicles. Not only we will service, repair or MOT your vehicle but we also specialise in: - Diesel systems - Injector pulling - ECU remapping and faults removing (modifications to the engine controller software) - Advanced diagnosis - 3D alignment (latest equipment) - New and part worn tyres - DPF filters solutions - Air condition service and repairs Try us and you will not be disappointed!

Unit 7, Lynton Road, Swindon, SN2 2QJ

Infinity Automotive

Whether you need car servicing or repairs, we have the expertise and the latest equipment to provide you with the highest standard of services. From interim services to full MOTs, steering alignment and main dealer level diagnostics at a fraction of the price, you will get quality services every time. We are BMW/MINI specialists however, we work on all makes and models due to our vast knowledge and equipment that we have on site, so rest assured you will get a main dealer service at better than half the price!

Unit 2, Cheney Manor Industrial Estate, Swindon, SN22QB

GR Auto Services Ltd

We are one of the largest family owned independent garages in Yate, near Bristol. GR Auto Services have been servicing, carrying out MOT's and repairing most makes and models locally for over 20 years. We score highly with our customer service surveys. Our customer satisfaction rate can be seen on the Good Garage Scheme website and it averages between 96 - 97%. GR Auto Services received an award in 2012 from a major lease company for over 15 years of exceptional service to them and their customers. Our receptionist boasts both male and female staff, and we offer a collection and delivery service with in a 6 mile radius. We use 3 diagnostic computers so we are very strong on engine diagnostics with most makes and models. At Eurorepar Car Service, we’re all about keeping you and your car moving with confidence. As a trusted network of local garages, we provide high-quality car maintenance and repairs tailored to your needs – all at competitive prices. With our exclusive Brakes for Life program and a 2-year parts and labour warranty, you can drive away knowing you’re covered for the long haul.* Ask your Eurorepar Car Service Centre to fit Eurorepar branded parts to qualify. Claims under the 2-year parts and labour warranty must be made at a Eurorepar Car Service Centre. Discover expert care, unbeatable value, and peace of mind – all under one roof. Ready to experience the Eurorepar difference? Request a quote or give us a call today! *Terms and conditions apply.

24 North Road, Yate, Bristol, BS377PA

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.