Book a Car Diagnostic in Liverpool

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 Liverpool

We’ll come to you at home or work

RAC Mobile Mechanic in Liverpool

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.

A customer tending to her garage with an RAC Mobile Mechanic in the background

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.

Close up of an RAC Mobile Mechanic running a vehicle diagnostic check

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 Liverpool

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

MerseyGarages

5.0/5

We set up in 2016 as a garage to repair vehicles because we have been appalled at some of the horror stories we have seen and heard about garages with customers vehicles. No need to book time off from work/ home commitments. We offer a FREE collection and delivery service for your vehicle. We are an honest, transparent and open garage, who prides itself on looking after the customer. Once you've had your car repaired with us, you'll bring your family and friends here too, we guarantee it!

131 Great Howard Street, Liverpool, L37AT

Durley Garage & MOT Centre Ltd.

5.0/5

Durley Garage and MOT Centre have been catering for all car and light vehicle repair services in the Wirral since 1992 and we have over 38 years of continuous experience in the trade. The team consists of 7 qualified members of staff, please see a brief detail of the staff below. Graham Malam - Director and TechnicianStarted the company up along with his business partner and has been in the trade since 1974. Graham covers the majority of areas in the business he is an accredited motor engineer and a qualified City and Guilds technician. Greg Maxwell - Director and Technician Started the company with Graham in 1992 and covers majority areas in the business. He is an accredited Motor Engineer and qualified City and Guilds technicianIan Malam - Senior TechnicianHas been with the company since 1992 and is qualified City and Guilds technician. Ian is a specialist in Ford vehicles. Chris Halsey - TechnicianHas been with us since school when he joined us as an apprentice and he is now fully qualified technician specialising in Major engine repairs and gearboxes. He has achieved NVQ Level 3 City and Guilds. Office Staff Neil Malam - Service Manager and Diagnostic Specialist Has been with us since 2002 and he controls all aspects of work load, reception queries and accounts. He is a computer diagnostic specialist. All of our technicians are main dealer trained and fully accredited.

3 Prenton Way, North Cheshire Trading Estate, Prenton, CH433DU

R&S Services – Car Servicing & Diagnostics Birkenhead

4.8/5

As an RAC Approved Garage, we’re committed to honest advice, transparent pricing, and quality workmanship. Whether it’s a routine oil change, warning light investigation, or complex electrical fault, we have the experience and equipment to keep your vehicle in top shape. We also offer air conditioning servicing, brakes, suspension repairs, clutches, timing belts, timing chains, coolant pumps, alternators, batteries and much much more! Book online or call today — your local specialists for reliable car servicing and diagnostics in Birkenhead.

364 Brook Street, Birkenhead, Wirral, CH414LB

Car Bar and Wheel Spa

4.6/5

Car Bar and Wheel Spa is your trusted destination for top-quality car repair and maintenance services. As an RAC Approved Garage, we are proud to offer expert solutions that ensure your vehicle's optimal performance and your peace of mind. With a customer-centric approach and a commitment to excellence, we provide a range of services that cater to your car's needs. Experience professional care and the assurance of RAC approval at Car Bar and Wheel Spa. Contact Information: Address: 215 Knowsley Raod PhoneEmail: [email protected] Website: https://www.carbarandwheelspa.com/ Choose Car Bar and Wheel Spa for dependable car care and RAC-approved service you can count on.

Unit 1A 215-217 Knowsley Road, Bootle, L204NN

almondsgreen service center

3.7/5

here at almondsgreen we work on all types of vehicles ,we are a dvsa approved mot station and carry out all repairs by qualified staff

Unit 5 Nelsons Business Pk, Liverpool, L97BN

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.