Car Diagnostics | Book a Car Diagnostic for your Renault

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 Renault models such as Clio, Captur, Arkana, Austral, and Mégane E-Tech. This service is completed at your home or workplace, following Renault 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 Renault

We’ll come to you at home or work

RAC Mobile Mechanic for your Renault

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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 Renault

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

Liontech 1996 limited

4.7/5

Mot test centre service and repairs diagnostics

Unit Mb2, Hves Industrial Estate, Primrose Avenue, Wolverhampton, WV10 8AW

ZS Motors London Ltd

5.0/5

At ZS Motors London Ltd, we pride ourselves on delivering trusted, high-quality automotive services across Rainham (Essex) and east London. With years of experience in the motor trade, we specialise in MOT, engine rebuilds, servicing, diagnostics, and repairs for a wide range of makes and models. Our mission is simple to provide honest advice, reliable workmanship, and excellent customer service. Whether you’re buying your next car, maintaining your current one, or in need of emergency repairs, our expert team ensures your vehicle is always in safe hands. Based in Rainham (Essex) East London, we have built our reputation on transparency, integrity, and a commitment to keeping our customers on the road with confidence.

Unit 3 And 4 Blackwater Close, Fairview Industrial Park, Rainham, RM138UA

Sahibs Auto Electric

4.0/5

We are London's go to centre for MOT, Servicing, Alternators, Starter Motors and Car Diagnostics. We pride ourselves in Car Electrics and are well renowned for are specialists in Car Alternators and Car Starter Motors. Established in 1980, we have nearly 40 years of trusted experience the industry.

3 Norbreck Parade, London, NW107HR

Tyre King Autocentres Long Eaton

5.0/5

At Tyre King autocentres, we are your trusted local mechanics, committed to keeping you safe on the road. With years of hands-on experience and a team of fully qualified technicians, we specialise in delivering top-quality vehicle maintenance, repairs, and diagnostics at competitive prices. Our workshop is fully equipped with the latest tools and technology, allowing us to handle everything from routine servicing to complex mechanical issues—quickly, efficiently, and to the highest standards. Our Specialities We offer a full range of professional automotive services, including: MOT Testing (Class 4) Fast, reliable MOTs to ensure your vehicle meets all legal and safety standards. Servicing (Interim & Full) Regular servicing to keep your car running smoothly, improve fuel efficiency, and avoid costly repairs down the line. Brakes Complete brake inspections, repairs, and replacements using high-quality parts for your safety. Tyres Supply, fitting, balancing, and alignment of new tyres from leading brands. We also handle puncture repairs. General Repairs From cooling and exhausts to suspension and diagnostics, we fix it all—honestly and efficiently. Why Choose Us? . Experienced Technicians Our mechanics are highly trained and experienced with all makes and models. . Transparent Pricing No hidden costs. We provide clear quotes and explain all work before we begin. . Customer-Focused Service We pride ourselves on honesty, reliability, and friendly service. Your satisfaction is our top priority. . Quick Turnaround We know your time is valuable—most jobs are completed same-day. . Local & Trusted Proud to be part of the local community, with many loyal customers and 5-star reviews.

Phoenix Mills, Nottingham Road, Long Eaton, Nottingham, NG102AA

autotrend motor services limited

4.8/5

Autotrend Motor Services offers Car & Light Commercial Repairs, MOT Testing (Class 4 and Class 7), Welding, Air Conditioning, Servicing, Clutches, Tracking and Diagnostics. Our garage is based in Chatham, Medway, Kent. Autotrend Motor Services have been trading for over 30 years so you can guarantee your vehicle is serviced and repaired to a high standard whilst still offering great value for money to all of our customers. We carry out high quality vehicle servicing, that now due to block exemption will not invalidate your manufacturers warranty. Previously motorists were required to have their vehicle serviced and repaired at the 'main dealer', so as not to invalidate their warranty. The EC Block Exemption Regulation 1400/2002 (October 2003) allows motorists more flexibility in selecting where they get their vehicle serviced. Thanks to this legislation, maintenance and service work no longer has to be carried out by the' main dealer' providing the garage uses Original Equipment (Matching Quality) parts and that the garage follow the manufacturer's service schedules whilst keeping a record. The Block Exemption Regulation (BER) covers service and maintenance during the warranty period and prohibits vehicle manufacturers’ warranties from including conditions that require: 1/ All normal maintenance be provided within the vehicle manufacturer’s network 2/ All parts used must be the manufacturer’s original spare parts Therefore we can provide customers with savings of up to 60% on their car service and repairs! We also carry out a wide range of vehicle repairs from wiper blades to major engine repairs and everything in between.inc hybrid and electric vehicles At Eurorepar Car Service, 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.* Ask your Eurorepar Car Service Centre to fit Eurorepar branded parts to qualify. Claims under the 2-year parts and labour warranty must be made at a Eurorepar Car Service Centre. Discover expert care, unbeatable value, and peace of mind – all under one roof. Ready to experience the Eurorepar difference? Request a quote or give us a call today! *Terms and conditions apply.

101-109, Beacon Road, Chatham, ME57BP

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.