Car Diagnostics | Book a Car Diagnostic in Swansea

£55.17

Average price for this repair in Swansea in the last 30 days^

Trustpilot rating for all RAC Mobile Mechanics.

Why choose the RAC for a car diagnostic?

At the RAC, we've got over 125 years' experience helping UK drivers. We have the skills and knowledge to keep your vehicle running.

Plus, with RAC Mobile Mechanics, you can avoid the hassle of taking your vehicle to a garage when you need a repair. We’ll come to you, at your home or work.

Close up of an RAC Mobile Mechanic underneath a car

Our top pick in Swansea

Our top pick

RAC Mobile Mechanic in Swansea

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.

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.

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

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.

Try one of our RAC Approved Garages

View all garages

Manselton MOT Centre

5.0/5

Manselton MOT & Service Centre is a family run vehicle service and testing station, focused on providing you with truly outstanding garage services at the right price. At Manselton MOT & Service Centre, our experts can perform various garage services on your car or van. We can work on all makes and models of cars and light commercial vehicles. We will run tests to pinpoint the problem, fix the issue for you, and perform general maintenance on the rest of the vehicle to keep you running longer. Our general car and van servicing also covers tyre fitting and engine management. We aim to be your one-stop-shop for all of your automotive needs.

Unit 3 Cambrian Yard, David Street, Manselton, SA58NX

Keep Driving Auto Ltd

4.9/5

Here at Keep Driving Auto we provide a first rate, friendly garage service. Serving the Swansea area, located in Llansamlet within easy reach of both the city Centre and Swansea Enterprise Park.

Unit 7 St Lukes Court, Clarke Way Swansea Enterprise Park, Llansamlet, Swansea, SA17ER

C G AUTO REPAIRS

4.7/5

Here at C&G AUTO REPAIRS we have over 20 years experience in Diagnostics and repairs on all make and model vehicles. we can do anything from timing belt renewals to clutch replacement, DPF cleaning. you name it we can give you a quote At Eurorepar Car Service, we’re all about keeping you and your car moving with confidence. As a trusted network of local garages, we provide high-quality car maintenance and repairs tailored to your needs – all at competitive prices. With our exclusive Brakes for Life program and a 2-year parts and labour warranty, you can drive away knowing you’re covered for the long haul.* Ask your Eurorepar Car Service Centre to fit Eurorepar branded parts to qualify. Claims under the 2-year parts and labour warranty must be made at a Eurorepar Car Service Centre. Discover expert care, unbeatable value, and peace of mind – all under one roof. Ready to experience the Eurorepar difference? Request a quote or give us a call today! *Terms and conditions apply.

Unit F1, Sa1 Business Park, Langdon Road, SA18DB

Eastlake Garage

4.7/5

We are a well-established company which has been in operation since 2010. As well as being a fully stocked garage, we also have fully stocked mobile workshop vans and we carry out both in house and mobile repairs and servicing for our customers in and around South Wales. As part of our ongoing expansion of our company we can now offer a 24-hour callout service within the Mid Glamorgan area - other areas are covered but charges are applicable. We are AA and RAC certified to carry out their breakdown and repair 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 20 miles of the garage, and we also offer discounts to NHS and Emergency Service staff members upon valid photographic identification.

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

Gorseinon Tyre & Service Centre.

4.3/5

Gorseinon Tyre & Service Centre is a family run business and we have over 30 years experience within the motor trade offering our customers high quality service at affordable prices. We specialise in servicing all makes of cars and vans and we have the latest diagnostic tools to quickly identify and resolve your vehicle problems. We have two garages located in walking distance from one another. Our Tyre garage and our Main Workshop and MOT station. We stock a large amount of tyres so no appointment is necessary - just call in and we will take care of it. We offer a friendly waiting area for customers. In addition to this we also specialise in exhausts, batteries, clutches, brakes, car repairs, engine diagnostics, auto electrical. We offer a local drop off and collection service to our customers so if you are living in the area of working and can’t get back- please just give us a call and we will take care of it!

Old Brisco Yard Gorseinon Road, Penllergaer, Swansea, SA49GE

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.