Car Diagnostics | Book a Car Diagnostic in Gloucester

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a car diagnostic?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running.

Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Gloucester

Our top pick

RAC Mobile Mechanic in Gloucester

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. 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.

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

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.

Try one of our RAC Approved Garages

View all garages

Trade N Save Centre

5.0/5

With over 25 years used car and Renault experience, Rob Thomas leads the team at Gloucester’s Independent Renault Specialists ‘Trade ‘n’ Save’. His focus on customer satisfaction reflects right through all members of staff and that is exactly how this business functions as a ‘Team’. Rob ran one of the biggest Renault dealerships in the south west before founding the ‘Trade ‘n’ Save’ Centre in April 2001 and since then he and his team have worked tirelessly together to make the ‘Trade ‘n’ Save’ Centre the biggest and most experienced Renault Specialist in the county.

Mercia Road, Gloucester, GL12SQ

Vehicle Solutions Cheltenham

4.8/5

We've been providing a complete range of services for your vehicle since 1997 and have helped thousands of happy clients across Cheltenham and Gloucestershire. We have 16 fully trained technicians and make a courtesy car available for every customer. We're your 'one stop shop' garage, meaning you don't need to go anywhere else to maintain and enhance your car. Whether you need your annual MOT ticking off your list, a regular service or have something that requires fixing, we offer great value and service for any vehicle. And if you're looking for new tyres, have some alloy wheels to refurbish or need your car cleaning, then we can provide these for you too. We also specialise in body repairs and carry out work for most of the local main car dealers. If you are looking for a comparable quote for your insurance claim or just need your vehicle to looks its best again after an accident, get in touch to find out how we can help.

Hayricks Wharf, Tewkesbury Road, Cheltenham, GL51 9DR

Swift Fit Ltd

4.7/5

Welcome to Swiftfit one of Gloucestershire's leading independent garages for over 25 years. We are local, serving Gloucester and the surrounding area. Our garage always endeavors to give the best service and value for money possible. We pride ourselves on going that extra mile for every customer.

10 Off Cole Avenue, Shepherd Rd, Gloucester, GL25EL

Car Care Tetbury

4.4/5

Established in 1974, we are Tetbury's premier independent garage offering a dedicated and experienced team of seven mechanics. As a small, family run business we provide a professional yet personal service and a familiar face to all of our returning customers. We have been voted Independent Garage of the Year 2012 by both Motor Trader and the Motor Industry Code of Practice! We offer a full range of services for all makes of cars, four wheel drives and light commercial vehicles. At Car Care Tetbury customer satisfaction is our top priority so please contact us today at whocanfixmycar.com.

Car Care (Tetbury) Ltd, Units 1-3, Priory Industrial Estate, London Road, Tetbury, GL8 8HZ

T L Automotive Services Ltd

4.2/5

Here at TL Automotive we are a friendly and trusted independent garage dedicated to providing sensational service to you and your vehicle. We are here to build solid and trusting customer relationships based on providing a truly excellent service with great value. We want to prove to you that we will go the 'extra mile' to gain your custom and, more importantly, retain it.

Llanthony Industrial Estate, Llanthony Road, Gloucester, GL25HL

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.