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

1 STOP MOTORS (CHESHIRE) LTD

4.3/5

We are 1 Stop Motors, based in Macclesfield, a family owned independent garage. We believe in offering a personal and professional service, applying our family values to the daily running of our business. Since we were originally established in 2012, we have worked tirelessly to build up a strong reputation for our expert technical and mechanical knowledge as well as excellence in customer service. We offer a first class, efficient and friendly service and are always willing to go the extra mile. Taking time to discuss your requirements in detail, we pledge to always be upfront about the potential cost to you of any work we do for you to avoid any nasty surprises when you receive your bill. We are AA & RAC Certified. Our technicians are trained on the latest technologies and have the most up-to-date diagnostic equipment to pinpoint any faults in your car as quickly and accurately as possible. Any parts that need to be replaced will be of the same quality as those that were originally fitted on your vehicle. This commitment to customer care gives you peace of mind in knowing that you are going to be given not only the best technical service, but also the best customer service. We are more than happy to offer our customers a FREE collection and delivery service within 10 miles of the garage, to ease transportation issues whilst having your vehicle repaired or serviced.

1 Stop Motors (Cheshire) Ltd, Unit 1, Snape Road, Macclesfield, SK10 2NZ

J B Pipe Motor Engineers

5.0/5

A family run business established over 50 years. Providing a comprehensive range of garage services. Latest BOSCH Diagnostics. Body work and mechanical repairs. Clutch, Engine and Gearbox Specialists. We provide jargon free, friendly service and up-front pricing. Warranty work undertaken for all major warranty providers. We are an RAC Approved Garage. Winner of the RAC best customer Service Award 2021/2022. Category: Independent garages across all of the UK.

Unit 8, Commercial Road, Hazel Grove, SK7 4BG

N and V Automotive LTD

5.0/5

At N and V Automotive Ltd, we are proud to serve drivers in Tipton with a complete range of garage services. With over 15 years of experience, we combine technical expertise with a customer-first approach to deliver outstanding results every time. Our goal is to make every visit stress-free and ensure your vehicle receives the care it deserves. We understand that your car is essential to your daily life, which is why we offer services designed to keep it running smoothly and safely. Whether you need an MOT, servicing, or repairs, our team ensures your vehicle is safe, reliable, and performing at its best. We offer a full range of garage services designed to keep your car running smoothly: MOT Testing – Thorough checks to keep your vehicle road legal and compliant. Servicing – Interim, full, and major services tailored to your needs and driving habits. Repairs – From clutch replacements to general mechanical fixes, we handle it all. Diagnostics – Using Autel and Bosch KTS equipment for accurate fault detection and quick solutions. Added Convenience for Every Visit We make your life easier with: Free refreshments (tea & coffee) while you wait Comfortable waiting area designed for your comfort Free Wi-Fi so you can stay connected 10% discount for NHS staff as a thank you for their service

Unit 4A, Alexandra Industrial Estate, Locarno Road, Tipton, DY49SJ

R.B Automotive

5.0/5

We are a local garage carrying out vehicle servicing and repair. With over 40 years combined experience with all makes and models you can trust your vehicle is in safe hands.

R B Automotive, Chester Road West, Deeside, CH51SA

Horizon Motor Group Ltd.

4.5/5

We are an established local independent garage and are proud to be members of Autofirst Network – a nationwide network of independent garages operating to the Network’s 6 core values of Capability, Consistency, Care, Clarity, Cost Effectiveness and Customer Focus. For your added peace of mind we are members of the Motor Ombudsman service which is approved by The Trading Standards Institute. In short, we are a local garage you can trust offering you the support and service guarantees of a national network, giving you complete peace of mind. We cover Wingham and surrounding areas and also offer courtesy cars and a free collection and delivery service.

Canterbury, Wingham, CT31NL

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.