Book a Car Diagnostic in Ealing

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 Ealing

We’ll come to you at home or work

RAC Mobile Mechanic in Ealing

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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.

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 Ealing

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

BTWL PERIVALE LIMITED

OFFERING HIGH QUALITY REPAIRS BY EXPERIENCED STAFF BTWL Perivale LTD was set up by four partners who all had an ambition of running their own car accident repair centre, putting their vast experience and knowledge in action. BTWL Perivale is an independent vehicle repairer, opening its doors in April 2024 , offering a high quality comprehensive service in west London and the surrounding areas. BTWL Perivale is the second car accident repair we have opened. Our first one is called Bodytech West London LTD located in Acton. At RAC, we’re all about keeping you and your car moving with confidence. As a trusted network of local garages, we provide high-quality car maintenance and repairs tailored to your needs – all at competitive prices. With our exclusive Brakes for Life program and a 2-year parts and labour warranty, you can drive away knowing you’re covered for the long haul.* Discover expert care, unbeatable value, and peace of mind – all under one roof. Request a quote or give us a call today! *Terms and conditions apply.

61 Aintree Road, Perivale, Greenford, UB67LA

J & A Motors

J & A Motors has provided a first class service to motorists in West London since As a garage which is AA Certified, RAC Approved, an RMI member and a Which Trusted Trader, we take our work seriously. Having served multiple generations of families for 37 years, we understand just how important your vehicle is to you, which is why our fully trained technicians look after your car with the same care and attention that you do. To put it simply, we have a name you can trust. We undertake all mechanical work. We have fully fitted workshops with the latest diagnostic equipment operated by professional and qualified staff. Our friendly team are here to keep you informed every step of the way via phone or email, as you prefer. We offer a professional and friendly service for all your MOT, Servicing, mechanical repair, Crash/Body Repair and Spare Parts needs. We carry out all air conditioning work. We also supply and fit tyres at very competitive rates, with balancing and wheel alignment.

60 Greenford Road, Greenford, UB69AT

Motorfix Ltd Greenford

We consider ourself to be a one stop shop for all your car and van requirements. Having been established since 2008 and taking great pride in our work, we are members of the Good Garage Scheme, RMIF and the Motor Ombudsman which means that we adhere to a very strict code of conduct at all times as approved by the Chartered Trading Standards Institute. Our four technicians have many years of experience in the motor industry and are DVSA approved and are able to carry out class 4 and 7 MOT's, as well as all general repairs, maintenance and servicing to your vehicle. We provide a guarantee on our work of 12 months or 12,000 miles to ensure that you have security and peace of mind. By choosing us you will have no hidden charges or surprises.

Unit 4, 407 Oldfield Lane North, Greenford, UB68QE

Car Care Centre - Wembley Ltd

Car Care Centre (Wembley) Ltd offers a trusted and efficient service to the local community, maintaining high standards in automotive care. Our team, led by the knowledgeable Dipesh, is dedicated to providing straightforward, honest, and professional automotive services. From minor repairs to major overhauls, each task is handled with precision and integrity. We believe in building lasting relationships with our clients, ensuring their vehicles receive the best care possible. Experience the difference at Car Care Centre, where exceptional service and customer satisfaction are at the forefront of our operations.

558 Market Way, Off Turton Road, Wembley, HA02BT

Yaash Motors.

Established in 1997, Yaash Motors trades is one of the leading car garages in Wembley serving trade and private customers throughout the north and west London areas. We provide a complete range of traditional services alongside professional body modifications primarily aimed at the popular Volkswagen Golf models. Yaash Motors specialises in the delivery of a professional, reliable service where fair, open and transparent pricing is a standard feature in all of our work. We have a comfortable customer waiting room where you can enjoy refreshments and WIFI. Our team strive to provide a fantastic customer experience and will always deliver you with honest and professional advice.

Unit 5A, 255 Water Road, Wembley, HA0 1JW

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.