Car Diagnostics | Book a Car Diagnostic for your BMW

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 BMW models such as 1 Series, 3 Series, X1, X3, and 2 Series. This service is completed at your home or workplace, following BMW 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 BMW

We’ll come to you at home or work

RAC Mobile Mechanic for your BMW

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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 BMW

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

ADA AUTOCARE LTD

5.0/5

ADA offers a wide range of repairs, servicing, MOT’s and more. Call us to see how we can help.

Unit 4 Whites Yard, Horsley Road, Northampton, NN26LJ

Dino Motor Company Limited

5.0/5

We are a newly established garage, we are looking to build a healthy customer base, we operate on a commercial site located between the A30 and A33, perfect for commuters with our long oopening hours it is easy to drop off before work and collect after!. We specialise in servicing, and smaller jobs (Brakes, Suspension, Clutches, Gearboxes) but can do the major jobs aswell!

Brickhouse Farm Commercial Unit, Brickhouse Hill, Eversley, RG270PY

A1 Motorist Centre

4.9/5

A1 Motorist Centre was first established in 2005 moving to our present site in late 2006. Our aim is to offer the latest technology that the motor industry can offer, combined with good old fashioned values and excellent customer care. We offer you a clean comfortable reception / waiting area with complimentary refreshments, free Wi-Fi internet connection and toilet facilities (this also includes disabled access). From here you will have a full view of the workshops so that you can watch as we work. We offer many services and our advice is free and impartial. We are members of the Good Garage Scheme and the Motor Industry Codes of Practice.

Unit 2, Patricia Way, Industrial Estate, Broadstairs, CT10 2LE

YDS AUTOMOTIVE

4.8/5

At YDS we offer General Maintenance and Servicing for all makes and models, while we specialise in the german vehicle industry we have the equipment, experience and knowledge to cater to any vehicle. Offering dealer level servicing at a fraction of the cost while still able to update digital and standard service records to preserve manufacturers warranty. Along side the every day stuff we offer all advanced and electrical diagnostics from running issues to audio problems we strive to get you that first time fix. And don't forget the fun stuff. At YDS we offer Varied packages with software and supporting performance hardware fully tailored to suit whatever you are behind the wheel of! Partnered with Performance companies and Payment Assist to make improving your car or van easier and more available than ever before!

Unit 5, Faraday Place, Thetford, IP243RG

Quadpoint Motor Service Ltd t/a RS Autos

4.9/5

We are a family run garage based in Farnworth, Bolton with more than 30 years of experience. We provide a range of service from mot's, diagnostic checks, repairs of all types -tyres, clutches engine faults, brakes bulbs, air con, general services and much more for cars, vans and light commercial vehicles. Our highly experienced mechanics strive to ensure that you receive a top quality, value for money service.

Unit 2 Gladstone Road, Farnworth, Bolton, BL47ED

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.