Book a Car Diagnostic in Lewisham

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 Lewisham

We’ll come to you at home or work

RAC Mobile Mechanic in Lewisham

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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 Lewisham

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

Dundalk Motors London

Dundalk Motors have a reputation throughout South East London for always delivering the very best care, repair, maintenance, MOT services and also for being Volvo specialists. We are proud to be a member of the Good Garage Scheme, giving all customers the peace of mind that Dundalk Motors always has your best interests at heart and operates according to a strict code of conduct. We have fully up to date Main dealer factory trained & ATA technicians on site. We use current Main dealer Software & Computer diagnostic systems to provide a full capability service as you would get at Main dealer. Our staff have been involved with specialist work for up to 28 years, so have all the experience you would expect. We have a very large clientele and returning customers who all rate us very highly. Our experience also enables us to diagnose quickly and be accurate on costs & time expected to complete all work required. Any make or model of vehicle REPAIRED. We are a Volvo registered specialist. We are a member of The Good Garage Scheme. Master Technician(s) on site. “You name it, we do it!” Services Here at Dundalk Motors we have the facilities to offer a large range of services, which include: Diagnostics Air conditioning specialists MOT’s on Motorbikes, Car, Vans, Minibuses. While you wait if required Car sales Tyres and wheel balancing Wheel alignment Welding While you wait service is available on most repairs Services and all repairs Winter and summer safety checks Windscreen Alloy refurbs Bodywork Interior refurbs Plus many other services – Please call or email for further information. We also have a comfortable waiting area with vending services. Tea/coffee, chilled water and free WiFi available.

96A St Asaph Road, London, SE42EL

We Fix Any Car Ltd

The Auto Fix Group was founded in 1984 and was originally known as Exhaust Express, later it became necessary for us to become known as ‘We Fix Any Car Ltd’ to better express our full range of capabilities. As the company continued to grow and expand we felt the need to create ‘The Auto Fix Group’ umbrella to cover the wide range of platforms, which are now covered today. Whilst being an ever expanding and leading motor trade organisation in the South East it has managed to remain a family run business which hasn’t lost any of the key values when they set out well over 25 years ago.

Fordmill Road, Catford, London, SE63JH

Clifton Autos Repair Centre LTD

At our car garage in Peckham we have the experienced and expertise to provide a wide range of repairs from brakes and batteries to exhausts and cambelts for all makes of vehicles as well as provide MOT repairs you might require for a failed MOT. Established for nearly 10, with years of combined experience in the motor industry our professional and experienced mechanics are on hand all year round, providing our customers in Peckham and surrounding areas with quality vehicle repairs. We believe in informed choices for our customers and always provide a full explanation of any faults and one straightforward quote. Our policy is to never proceed with work on a vehicle until we have advised you, the customer, and received confirmation that you are happy for us to go ahead with the repairs quoted.

35A Clifton Way, London, SE152LH

Kar Klinik SE26

Welcome to Kar Klinik, your trusted automotive service provider since 1999. Located in Sydenham, SE26, our family-run garage is committed to excellence in customer service and quality workmanship. We offer a comprehensive range of affordable car services tailored to meet the diverse needs of drivers throughout Sydenham SE26, Lewisham SE13, Brockley SE4, and the broader South-East London area. Experience the confidence and peace of mind that comes with a reputable garage known for integrity and expertise, dispelling common stereotypes and consistently earning the trust of our clients.

Unit 1, Abbey Trading Estate, London, SE265TW

Andrews garage

Established since 1974 Andrews Garage has been serving the local area for all its car related needs, such as, MOT'S, Servicing, Tyres, Bodywork (crash repairs), 3D 4 Wheel alignment, Air conditioning Re-gassing.

30-36 Padfield Road, London, SE59AA

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.