Book a Car Diagnostic in Bath

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 Bath

We’ll come to you at home or work

RAC Mobile Mechanic in Bath

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.

A customer tending to her garage with an RAC Mobile Mechanic in the background

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.

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.

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 Bath

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

Tech and tyres mobile vehicle services LTD

5.0/5

Professional garage and mobile tyre fitting service based in Wiltshire.

Bradford Road, Melksham, SN128LQ

K&C garage

4.6/5

Local family friendly garage for all car and light commercial needs including mot's servicing brakes battery's clutches welding and any other motoring needs.

The Old Station Yard, Avonmill Lane, Keynsham, Bristol, BS312UG

Monster Gear Garage

4.5/5

We are an independent 5 star garage with high experienced technicians that will take care of your vehicle, we cover a wide range of repairs like: MOT MOT repairs Servicing Air Con Regas Air Con Recharge Brakes Tyres Clutches Timing belt / chain replacements Diagnostics Engine repairs / replacement Drive in with no appointment. If you wish to wait while your car is being repaired we have a luxury waiting area with TV, Wi-Fi and free hot drinks. Our garage is a comfortable place for you and your vehicle.

Bridge Road Ind Est, Unit 16 - 18, Bristol, BS154TA

Bond Motor Services

4.2/5

Welcome to Bond Motor Services, a modern-thinking Motor Dealership and Repair Centre with a focus on traditional values and Service. We offer competitive Vehicle Servicing, Mechanical Repairs, Tyre Services and MOTs. Bond motor Services undertake the servicing and repair of all makes and models of cars and vans. Established for more than 15 years, proprietor expects nothing but the best from his team of qualified Technicians, and will ensure that both you and your car receive the very best of service. From your first contact you can expect friendly and open discussion about your vehicle and any work required, at an agreed and competitive price- This level of service and communication will continue, keeping you fully informed right up to the point when your vehicle is ready for collection.

50 The High Street, Kingswood, Bristol, BS15 4AJ

Fourth Avenue Autos.

3.5/5

Fourth Avenue Autos are a garage based in Radstock that specialise in the servicing and repair of all types of motor vehicle. The business was taken over in June 2006 by Ian and Ryan, who were originally from a Vauxhall Dealership where they trained and achieved gold status in vehicle diagnosis, they took over the well-known and popular site and customer base of Joval and Son, Radstock. With that as a foundation they have added the addition of a wealth of experienced staff and have achieved status as an RAC garage. AA garage. IMI registered garage Motor codes An agent for Blackcircles tyres Joining them in 2013 is third Director Alex Davenne who has bought a wealth of experience with him. Alex has over 25 years experience as a mechanic, is an ATA Accredited Master Technician, was previously an RAC Roadside Assistant and specialises in Electrical and Diesel Diagnostics. We offer a full range of services including MOT, servicing, repairs and diagnostics on all and any makes and models of cars and motorbikes from classic to modern. We also offer an ECU Re-mapping service, Van Conversions and Dealership level diagnostics. Fourth Avenue Autos give dealership quality with dealership trained staff at a competitive price. We can also work on your brand new vehicle without invalidating your warranty, by using genuine parts. We provide a free local pick-up and delivery service and also have a loan vehicle on request. We look forward to welcoming you. Ian, Ryan, Alex and the Team

Unit 33 Fourth Avenue, Westfield Industrial Estate Radstock, Bath, BA34XE

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.