Car Diagnostics | Book a Car Diagnostic for your Toyota

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 for your Toyota

Our top pick

RAC Mobile Mechanic for your Toyota

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.

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

Auto Motor Solutions

4.7/5

We are a Independant garage what pride ourselves on the high standards of our work and customer satisfaction. We are RAC approved garage and a SHELL oil stockist. We always use quality parts and provide free no obligation quotes. We also offer 4 Monthly Finance Payment Plan at 0% interest. All work is considered and can be quoted for from standard services to engine rebuilds.

33 Wiltshire Road, Hull, HU46PA

T & K Motors

4.9/5

T&K Motors have been established for more than 30 years and are a helpful friendly garage, we carry out MOT’s, servicing and mechanical repairs on all makes and models of vehicles. We pride ourselves on offering main dealer quality of work, at independent prices, whilst ensuring that your warranty remains intact by using genuine or manufacturer approved parts, and are usually able to save you over 60% in price comparison. Our mechanics are fully qualified with many years of experience behind them in the motor industry, who take great pride in their work. Our services include the following; • All makes serviced to manufacturer's specification • MOT VOSA class 4 and 7 Car and Light Commercial • Air Conditioning re-charge and leak testing • Batteries/Alternators checked and replaced • Brakes pads and discs, brake fluid changes • Clutch replacement and repair • Cylinder Head repairs • Engine management light diagnostics • Exhausts repaired and replaced • Free vehicle health check • Fuel injection diagnostic/repair • Oil and filter changes • Suspension spring replacement specialists • Timing belts and water pump replacement • Tyres fitted, balanced and aligned • Van servicing and repairs • Free Vehicle diagnostic checks • Welding repairs to MOT standard • Warning lights diagnosed and reset * Car Service, Van Service, Commercial vehicle service

47-53 Green Street, Ayr, KA88BQ

Andover MOT & Servicing Ltd

4.5/5

Car Servicing Andover offers everything you need from a modern state-of-the art workshop - with transparent charges and excellent customer service at the heart of everything we do. Our team of dedicated service professionals are here to meet your requirements and give you and your vehicle the best possible service and care As Car Servicing Andover are a Specialist service centre, all work and repairs are completed to the highest standard and you will receive a stamp in your manufacturer's service book. But we don't just service cars. We cover everything to do with your vehicle. Our experienced team of aftersales advisors will deal with the warranty company on your behalf and make all the necessary arrangements. We are one of the only service centres to offer free advice on your vehicle. If you have any problem or concern regarding your vehicle, please call our FREE advice helpline today. With all our experience would you want to go anywhere else? No additional work undertaken without your agreement. We will always advise you of any additional work and the costs involved and will not proceed with any work without your authorisation. Once the cost and work has been approved by you, work is then completed and you will be kept informed at all times of what your service will cost.

Broadway Garage, Suffolk Road, Andover, SP102JF

MH Motor Experts LTD

4.5/5

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, and are also AA certified to carry out their breakdown and repair work. 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. We offer courtesy cars and a free collection and delivery service within 5 miles of the garage.

Unit 7 Rushton Farm, Warren House Road, Wokingham, RG40 5RE

Auto-Line MOT Centre

5.0/5

Here at Auto-Line M O T we offer high quality servicing and mechanical repairs. We carry out any repairs to industry standard service manual labor times. We also offer a free collection and delivery service and vehicle movement services, which are subject to availability. We are a small close-knit team of two technicians with over 30 years of experience between us. We have a real passion for what we do and carry out every single job, no matter how big or small, to the highest standards. Owner Oliver is fully licensed, insured and qualified in the following; DVSA registered Authorised Examiner and mot tester Automotive Refrigerant Handling (EC Level 3 Award (IMI Awards Ltd) Light Vehicle Maintenance and Repair Competence, Level 3 Diploma (IMI Awards Ltd) Light Vehicle Maintenance and Repair Principles, Level 2 Diploma (IMI Awards Ltd). Numerous product courses with Ford Numerous product course with jaguar land rover Numerous product courses with BMW Luke is a landrover master technician Very experienced with all makes and models as comes from and aftermarket background. Light Vehicle Maintenance and Repair Competence, Level 3 Diploma (IMI Awards Ltd)

Unit 17 British Waterways Yard, Shardlow, Derby, DE722HL

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.