Car Diagnostics | Book a Car Diagnostic for your Subaru

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 Subaru models such as Outback, Forester, XV, Impreza, and Crosstrek. This service is completed at your home or workplace, following Subaru 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 Subaru

We’ll come to you at home or work

RAC Mobile Mechanic for your Subaru

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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 Subaru

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

Wimbledon Car Care

4.7/5

.Here at Wimbledon Car Care our number one priority to offer you the best possible service, repair and maintenance of their vehicle. Investing in the latest equipment ensuring that we’re always one step ahead. We specialise in all makes and models of vehicles, from brand new through to classic, for servicing, mechanical repairs, minor bodywork, MOT and Fleet Car support, enabling us to be one the best independent motor vehicle repair centres in and around Wimbledon and South West London.

163-167 Haydons Road, Wimbledon, SW198TB

Kissane and Jeffries (Recovery Services) Ltd

5.0/5

Kissane and Jeffries are a well established rescue and recovery company operating in the West Midlands and have been in the trade for over 30 years with proven ability to carry out a professional and competent service. We are constantly upgrading our fleet of breakdown and recovery vehicles and equipment to keep up with today's demands for the best in the business to ensure we can serve you as quickly as possible when needed. We also have comprehensive vehicle repair facilities available for most makes and models with very competitive pricing structures and a quality of service that will make you want to use us again and again, our technicians are ATA accredited and our workshops are registered to the BSi PAS 80 Standard. Customer satisfaction is our priority and we are focused on delivering a quality service whether it be as a one off job for an individual customer or one of the many jobs we carry out some of our blue chip clients, each and every customer is treated with the same high level of care, this is demonstrated with our commitment to the standards of ISO 9001 and PAS43.

Station Road, Rowley Regis, Warley, B65 0JY

Bismillah Garage Services Ltd

4.2/5

Bismillah Garage Services is a family business, well established and respected MOT & car service garage in Luton also supplying replacement automotive parts such as exhausts, brakes spark plugs, oil filters and tyres. We undertake car servicing and repairs that including computer diagnostics, brakes, clutches etc. Regular car servicing can extend the life of a vehicle considerably and can save money. We focus on providing an exceptional garage service with competitive pricing. We have been serving customers in the Luton for 15 years. We have an up-to-date, fully equipped test centre, with all the facilities to service and repair your vehicles. We have built a solid reputation in Luton for delivering high quality garage services tailor made to meet the needs of our clients. Much of our business comes from word of mouth and satisfied repeat customers.

2A Tudor Road, Luton, LU3 1RN

Duke Street Motors

4.2/5

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.

6 King Edward Road, Loughborough, LE111RZ

GJB Autos

4.2/5

Welcome to GJB Autos, we are a garage conveniently located on Littlestone Road New Romney. We serve the local community of the Romney Marsh and surrounding areas. We are proud to have been established since 1975, in North Street New Romney and moving to our current premises in Littlestone Road in 2015. GJB Autos have built a great reputation providing a professional and friendly service to all our customers. It’s important to regularly maintain and check your car, not only for your safety and the safety of drivers around you but it will also help to sell your car in the future with a comprehensive service history. GJB Autos offer a comprehensive range of services at our service center including engine diagnostics, servicing, brakes, tyres, air conditioning, ECU remapping and much more. With many years experience in the industry, we can carry out servicing on all makes and models of vehicle. GJB Autos is a VOSA approved MOT testing centre for class 1,2, and 4 and a registered member of the GoodGarageScheme.com RMI, Autofirst Network, RAC Approved/Accredited, we guarantee quality and efficient work at reasonable prices every time.

8 Littlestone Road, New Romney, Romney Marsh, TN288PL

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.