Service, Repairs & MOT

Car diagnostic in Plymouth

Book an RAC Mobile Mechanic and we’ll come to you at home or work.

  • 12-months parts guarantee
  • Honest pricing
  • Exceptional customer service

£83.51

Average price for this repair in Plymouth in the last 30 days^

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 Plymouth

Our top pick

RAC Mobile Mechanic in Plymouth

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.

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.
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:

We diagnose and repair clutch issues – whether your clutch is heavy or slipping, or you’re having trouble changing gears.
We check and correct alternator faults to keep your charging system running smoothly.
Oil is vital to a healthy engine, so it’s important to change it regularly.
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 Plymouth

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

Heywoods Recovery and Repairs

5.0/5

Heywoods Recovery and Repairs are a family run business located on the outskirts of Tavistock in West Devon. We offer a Nationwide Recovery service and have a fully equipped workshop. Our team of Technicians are equipped to deal with any issues that may arise from a mechanical failure. We have the latest Diagnostic equipment and Specialist tools to undertake those jobs that may have otherwise needed to go to the Main Dealer. We are able to work on the Latest EV and Plug In Hybrid vehicles. We are also able to cater for LCV and HGV repairs. All general mechanical work undertaken at reasonable rates.
Heywoods Recovery Unit 8, Pitts Cleave Ind Est, Tavistock, PL190NT

Polyne Garage.

4.8/5

Here at Polyne Garage we are a small local, independent, family run business and have been serving Saltash, Liskeard and the surrounding area for over 60 years. We offer a genuinely friendly and personal service and as a Unipart Car Care Centre, as well as first class mechanics and workshops, we offer top quality parts at competitive prices. We provide a unique 12 month / 12,000 mile warranty on parts and labour, which is honoured at over 2000 Car Care Centres nationwide. We also understand that dropping off and collecting your vehicle is not always convenient so we offer a collection and delivery service, please feel free to contact us for more information on this. We can estimate all jobs and will advise you in advance if any variation is necessary. Our opening hours are Monday to Friday 8:00AM - 5:00PM. From all of us here at Polyne Garage we look forward to hearing from you.
Trerulefoot, Saltash, Cornwall, PL125DA

Marshall Motors SW Ltd

4.0/5

Marshall Motors SW LTD is an independently run business that prides itself on offering unrivaled sales, services, MOTs and mechanical repairs to its customers in the local area and further afield.We offer a comprehensive range of services so whether you need to book an MOT, have your car inspected for its annual check over, or if you have an urgent problem that needs attention, our team of highly specialised mechanics are on hand to fulfill your requirements. RAC ApprovedRMI ApprovedTrust My Garage ApprovedMotor Codes ApprovedTrading Standards Approved
26 Valley Road, Plymouth, PL71RF

W G Friend & Son Ltd

4.0/5

W G Friend & Son Ltd
Units 8-10 Stowford Business Park, Ivybridge, Plymouth, PL21 0BE

Roundabout & Moxham Garage

3.9/5

We are a well known independent garage situated in the heart of Yelverton. We are extremely easy to find and have many amenities local to us. RAC trading standards approved. FREE COURTESY CAR AVAILABLE !!
Moorland Villas, Yelverton, PL206DT

Frequently asked questions on car diagnostics

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.

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.

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.

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

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.

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.