Car Diagnostics | Book a Car Diagnostic for your Toyota

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.

RAC Mobile Mechanics can carry out car diagnostics on popular Toyota models such as Yaris, Yaris Cross, Corolla, C-HR, and RAV4. This service is completed at your home or workplace, following Toyota maintenance guidance and using OEM‑equivalent parts. You get clear pricing, real‑time updates and a convenient, no‑hassle experience.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick for your Toyota

We’ll come to you at home or work

RAC Mobile Mechanic for your Toyota

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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.

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

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

Duke Street Motors

4.2/5

We are an established local independent garage and are proud to be members of Autofirst Network – a nationwide network of independent garages operating to the Network’s 6 core values of Capability, Consistency, Care, Clarity, Cost Effectiveness and Customer Focus. For your added peace of mind we are members of the Motor Ombudsman service which is approved by The Trading Standards Institute. In short, we are a local garage you can trust offering you the support and service guarantees of a national network, giving you complete peace of mind.

6 King Edward Road, Loughborough, LE111RZ

Apollo Servicing & Repairs Ltd

5.0/5

From diagnostics to repairs, we ensure your vehicle runs smoothly. We offer a wide range of services on all major makes & model of vehicle. As an independent business based in Wroxton, Banbury, we pride ourselves on providing customers an exceptional service at a affordable price without cutting corners. Services such as MOTs, Diagnostic, Tyres, Breaks, Clutches, Timing Belts, Air Conditioning, Exhausts, Servicing and Repairs. We have Courtesy Cars available, offer a Collection and Delivery Service, Health Checks and Recovery Services locally all free of charge. We have invested heavily into the best tools and equipment and have brand new facilities with a Waiting Area, Wifi, Parking, Drinks and Snacks. We look forward to welcoming you soon

Unit 8 Apollo Park Ironstone Ln, Banbury, OX156AY

Auto Solutions Axminster

4.4/5

The best in town - We are one of the leading vehicle repair, diagnostic & servicing garages across Devon, Somerset & Dorset. Based in Axminster we border 3 large counties making us appealing and convenient to a wide range of customers. If you want quality you would expect from the dealership, but with more personal and friendly atmosphere then you have found it. We have invested in all the latest specialist tools and diagnostic software that is specifically tailored for the software in your vehicle. Our Auto Repair shop is capable of servicing a variety of models. We only do the work that is needed for your problem.

Units 1, 2 And 3 Castle Gates, Castle Hill, Axminster, EX135RL

SKS Auto Services Ltd

4.8/5

SKS Auto Services, owned by good friends and business partners Bradley Dawson and Nathan Hinks was established in 2005 and has a reputation for professionalism, technical expertise and quality workmanship.SKS are committed to honesty and always charge a fair price for the work we do. We only use parts equivalent in quality to the original part unless otherwise agreed and as a business we have also invested heavily in the latest technology and diagnostic equipment, meaning whatever the problem you have with your vehicle we will be able to resolve it. Our experienced technicians are always on hand to offer friendly advice and support.

14 Royce Road, Peterborough, PE1 5YB

JOHN HARRISON LOWDHAM LIMITED, Bosch Car Service

4.6/5

Welcome to John Harrison (Lowdham) Ltd - we're a family run business having been established at the same location since 1946, later being the first established Peugeot dealership in the country in 1975. We pride ourselves in customer care, with many awards over the years gained through offering the very best in customer service experiences from buying a vehicle in the sales department through to our aftersales. We thrive on repeat business, with industry leading preparation standards alongside our non-pressurised sales environment enjoyed by our customers over the last 70 years. We provide the complete range of new Peugeot's from cars through to vans, alongside a superb range of 70+ multi franchise used vehicles. Our team will take the stress out of buying a new car. All you have to do is choose the one that best suits you. Then, the team will help you select the best finance package, organise the admin and get any maintenance taken care of. If you have any questions along the way, we will be more than happy to help. We also extensive aftersales facilities with 'All Makes' Servicing, MOT's, Four Wheel Alignment and more alongside our in-house bodyshop offering minor repairs through to full body resprays.

Southwell Road, Lowdham, Nottingham, NG147DS

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.