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

IN'n'OUT Autocentres - Erith

4.4/5

Professional MOT and Servicing while you shop. Simply drop off your vehicle and we’ll complete your service, MOT test or repair while you shop or relax in the café at Morrisons. With over 30 Autocentres across the UK and a 5-Star Trustpilot rating, IN‘n’OUT Autocentres is the big local garage you can trust, making caring for your car even easier

Morrisons Car Park, James Wyatt Way, Erith, DA82AH

Auto Solutions & Parts Limited

4.7/5

1) ENGINE REBUILDING ( RECONDITIONING ) 2) DSG Gearbox Repair and Replacements and most of the makes Automatic Transmission services 3) All mechanical work including MOT, Servicing, Brake Discs & Brake Pads, DPF Regen, Welding work so you do not always have to buy new parts if your old parts are repairable, etc. 4) New & Part worn Tyres on very good prices Special offer on selected tyre sizes on new ones 5) Air condition gas refill for new & old cars The reason to use us is that once you come to us you do not need to go to different garages for your vehicle repairs as we do everything under one roof

231A, Montgomery Street, Sparkbrook, Birmingham, B111DS

Sparrowhawk Motors IV LTD

4.4/5

From a convenient location in West London Sparrowhawk motors Garage has been offering a full range of garage services for over 20 years to customers from all over London. Whatever work your car needs, the team of qualified mechanics will carry out great work for a reasonable cost. In addition, we can assure your expectations will be exceeded whatever your requirements may be. If you are looking for car repairs or service in the London area, then Sparrowhawk motors can meet your needs at a competitive price. The convenient location makes it ideal for the Londoners to find us.

Arch 15, Munster Road, Chelsea, SW64RY

Sakis Auto Centre

4.1/5

Sakis Auto Centre

Unit 2B Cole River Park, Warwick Road, B11 2QX

Pak Motors Glasgow Ltd.

4.1/5

Pak Motors Glasgow Ltd , Scotland - South West PAK Motors has been operating since 2014. We are a local business for the local people and we care. The garage offers a 5 ramp workshop with 4 service ramps and 1 dedicated MOT ramp for class 4,5 & 7 testing. We are equipped with latest technology, excellent infrastructural facilities and a team of professional mechanics to solve every automobile-related need. Our high standard premium garage features quality services and state-of-the-art machinery and equipment to give you the service you deserve. We are able to work on all makes/models and repairs. In short, we are a one stop shop for all your motoring needs from a simple oil change or MOT to a major head gasket replacement we have you covered! We also are pleased to announce we offer a free collection/delivery service locally for our customers convenience Note: If you don't want to pay all of your bill in one go, no problem as we do offer Payment assist.

105-109 Whitefield Road, Glasgow, G512SD

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.