Book a Car Diagnostic in Oldham

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.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Oldham

We’ll come to you at home or work

RAC Mobile Mechanic in Oldham

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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.

Average cost of a vehicle diagnostic by car make^

The RAC charges a flat rate for the cost of a car diagnostic but prices may change due to inflation. According to RAC data, the average cost of a car diagnostic is £87.

Make	Average price
Ford	£105
Vauxhall	£105
Volkswagen	£105
Peugeot	£104
Mercedes-Benz	£104
Nissan	£106
BMW	£107
Audi	£106
Renault	£104
Citroen	£104

^Average price quoted for RAC Mobile Mechanics from 01/01/25 to 31/03/25.

And it’s not just car diagnostics that we do in Oldham

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

S&P Lomas Autos

S & P Lomas Ltd is a family run business which has grown from strength to strength over the years Our investment in the latest diagnostics equipment means we offer specialised services for most makes and models of vehicle, including light commercial vehicles.The most up-to-date diagnostic equipment in our workshops and trained, highly skilled technicians, ensures you receive the highest level of expertise.We are an MOT approved centre and members of the RAC We also are registered with Mercedes BMW Audi VAG VW Land Rover Jaguar Mazda For On Line Service Records DSB OSH etc

Dunkerley Street, Oldham, OL4 2AX

Royton Car Service Ltd

We are a R.A.C approved garage celebrating 10 years in business. We offer customers quality customer service in front of house and on the shop floor. Our success has been built on trust and honesty and most importantly a friendly warm welcome that is keen to help you, ”the customer “ and your vehicles needs. Our technicians are fully trained with a vast amount of experience working on all types of vehicle makes and models. Your vehicle is in very good hands. We are very focus on keeping your business, and going the extra mile by offering a range of free services to get you and your vehicle back on the road.

High Barn Street, Royton, OL26RN

L.P Autos

L.p Autos LTD specialises in all vehicle makes and models. Our services range from servicing, diagnostics, Brakes, Suspension, Clutches, Engine repair. We are a family business and we take care of our customers as if they are part of that team.

Unit 5 Greenhalgh Street, Failsworth, M350BW

Guide Bridge MOT & Service Centre Limited

We are an Independent RAC Approved Garage situated 2 minutes from Junction 23 M60 and within 200 Metres of a substantial Public Transport Network. We are members of the Independent Garage Association, Trading Standards Approved code and the RMI and as such adhere to all of their Customer Charters and Standards , which gives you peace of mind your vehicle is in safe hands. We pride ourselves on the services we offer, having a competitive labour rate, using quality parts and a second to none approach to customer care. Many repairs over £300 can be paid over a four month period with 0% interest and no credit checking (up to £1000).

Unit 5 South Street, Guide Bridge, Ashton Under Lyne, OL7 0HU

MK Automobiles Ltd

MK Automobiles Ltd was established in 2005 and are a family run Sales and Servicing dealership in Rochdale, Greater Manchester (Lancashire) just off junction 20 of the M62 Motorway. We have a great reputation for customer satisfaction and are rated 4.9* by Autotrader, 4.9* Judge Service and 4.4* by Google for our customer reviews. Our Service department led by Brain Marland have a wealth of knowledge with a combined experience of over 65 years. We utilise the latest dealership diagnostic equipment and latest Manufacturers working instructions and offer a wide range of services including, RAC and other Warranty Company repair work, routine Servicing and repair work, Brakes, Clutches, Gearbox & Engine repairs, Suspension systems, Timing Belt replacements, MOT's and more. We use only genuine or high quality original equipment Manufacturer parts and lubricants. Feel free to contact us for a no obligation quote email us on [email protected].

Crawford Street, Rochdale, OL165RS

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.