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

Eastlake Garage

4.7/5

We are a well-established company with two sites in the local area, which have been in operation since 1999. We are AA, RAC and GREEN FLAG certified and are able carry out their breakdown and repair work and warranty work, as well as being Trading Standards approved and members of the Motor Ombudsman adhering to their strict code of conduct at all times. We are also Afilliated with the IMI We can offer our customers a free vehicle collection and delivery service within 10 miles of the garages, and we also offer discounts to NHS and Emergency Service staff members upon valid photographic identification.

Gaens Quarry, Porthcawl Road, South Cornelly , Bridgend, CF334RN

Precision Autos Ltd

5.0/5

Established in November 2022 we are a freshly set up automotive repair shop based in South Molton, North Devon. We undertake many different types of vehicle repair and have a vast array of equipment in order to accommodate most types of repair necessary to vehicles old and new! We have over 25 years of experience repairing, fault finding and modifying in all aspects, from bulb changes to engine rebuilds, rewiring to restoration, tyre puncture repair to race car preparation, from brake pad replacement to full brake upgrades. We like to offer a trustworthy and honest approach to car repair, often going beyond what is necessary to keep you safely on the road. We also like to show you and explain potential problems and what they may cause giving you choices for the cost conscious motorist. Tea and coffee is very much available, made to your liking! So whether you want a chat about a slight rattle, or to book in for the Precision treatment, we're here for you and your vehicle, on hand with a proper brew and a friendly service.

Precision Autos Ltd, Units 9 And 10 J Bucknell Way Pathfields Business Park, South Molton, EX363FU

Mobile Mechanics and Tyres

4.8/5

Services provided: -- Can build and assemble machines or mechanical components according to requirements -- Able to Inspect machines, engines, transmissions etc. and run diagnostic tests to discover functionality issues -- Will aim to troubleshoot reported problems and resolve them in a timely manner -- Will perform thorough maintenance on machinery, equipment and systems -- Will clean and apply lubricants to components -- Will replenish engine fluids and components -- Will provide consultation on correct maintenance and preventative measures -- Can also undertake other duties (e.g. repair of hydraulic systems) -- Can provide logs of work and report on issues Experience: Proven experience as Mechanic for 12 years. Excellent knowledge of machinery and hydraulic, electrical and other systems and their components. Experienced in using various precision tools (I have equipment to perform most mechanical work). Will follow established procedures and practices with a strong commitment to health and safety. Very good communication skills with problem-solving capabilities. Very good physical strength and stamina Qualifications: BTEC national diploma motor vehicles (2 year course) HNC motor vehicles (1 year course) HND motor vehicles (1 year course) IMI (Institute of the Motor Industry) MOT Certification NT / AE / Site Manager Classes of Vehicles tested: Class Descriptionwheeled vehicles (over 450kg unladen weight) 4 Cars (up to 8 passenger seats) 4 Motor caravans 4 Quads (max unladen weight 400kg - for goods vehicles 550kg and max net power of 15kw) 4 Dual purpose vehicles 4 Private hire and public service vehicles (up to 8 seats) 4 Ambulances and taxis 4 Private passenger vehicles and ambulances (9 to 12 passenger seats) 4 Goods vehicles (up to 3,000kg design gross weight) 4a Class 4 vehicles (9 to 12 passenger seats) with a seat belt installation checkPrivate passenger vehicles and ambulances (13 to 16 passenger seats) 5 Private passenger vehicles and ambulances (more than 16 passenger seats) 5 Playbuses 5a Class 5 vehicles (13 to 16 passenger seats) with a seatbelt installation check 5a Class 5 vehicles (more than 16 passenger seats) with a seatbelt installation check 7 Goods vehicles (over 3,000kg up to 3,500kg design gross weight

Unit 4, Red Rose Trading Estate, Lancaster Road, Barnet, EN48BZ

Sds motors ltd

4.8/5

SDS MOTORS is a family company responsible for inspecting and repairing vehicles, diagnosing problems and performing maintenance work on them. Shpetim the mechanic of the company has more than 10 years of experience in this industry with very high problem solving skills, efficient, quick and organized.

21 Rosemary Road, London, SW170AR

DK Auto Repair

5.0/5

At DK Auto Repair, we are a team of skilled and certified automotive technicians dedicated to providing the highest level of service. Our goal is to take the stress out of auto repair by offering transparent, honest, and affordable solutions. Whether you’re in need of routine maintenance, major repairs, or emergency services, we are here to get you back on the road as quickly and safely as possible. Clutch repairs Electrical repairs Timing belts and chains Head gasket replacement Suspension and brakes Free vehicle check Injector refurbishment Bodywork repairs

Unit 3, Oak Lane, Littleport, CB61RS

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.