Car Diagnostics | Book a Car Diagnostic for your Porsche

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 for your Porsche

We’ll come to you at home or work

RAC Mobile Mechanic for your Porsche

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. Plus, when we’ve diagnosed the problem get £50 off mobile mechanic repairs over £150 – for a limited time only. ^†T&Cs apply. Offer ends 03/08, 23:59.

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 for your Porsche

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

hiq hereford

5.0/5

Here at HiQ Tyres & Autocare, Hereford we have been trading since 2017. Our regular customers will know us as Wye Valley Tyres and it’s still the same team but we’ve joined the HiQ network with the backing of Goodyear. 2 years ago during Covid, we outgrew our premises and took on the new unit as an exciting new venture. This gave us the opportunity to not just offer Mobile Tyre Fitting but also to be able to offer Class 4 & 7 MOTs, Car Servicing, 4 Wheel Laser Alignment, Air Conditioning Service, Clutches, Brakes, Batteries and much more. We pride ourselves on the fact that once you choose to use us once you will keep coming back due to our great pricing, great service and great offering. We understand that some car services can be pricey that's why you can buy now and pay later with our Payment Assist finance option. A friendly reminder that HiQ Hereford is open 24 Hours Per Day for Mobile Tyre Fitting, call the Centre to find out more.

Unit 4 Red Barn Drive, Hereford, HR49NS

Autocentric

4.6/5

We know that your vehicle is more than just a mode of transportation; it's an integral part of your daily life. Whether you rely on your car for commuting, running errands, or embarking on epic road trips, you deserve a reliable, safe, and well-maintained vehicle. That's where we come in. With decades of combined experience, our mechanics are seasoned professionals who have seen it all. From routine maintenance to complex repairs, we've got the knowledge and skills to handle it. We never compromise on quality. We use top-of-the-line parts and cutting-edge diagnostics to deliver results that you can trust. Your satisfaction is our priority. We're committed to transparency, fair pricing, and open communication throughout your service experience, including a short complimentary video showing you exactly where the issues are with your vehicle. Just let us know and will include this at no extra cost to you! A few other perks we offer: Collection and Delivery Services including Essex, Kent and surrounding areas Warranty repair - we work with all leading warranty companies - we are VAT registered Payment Options - we work with Payment Assist so that our customers have the flexibility to spread the cost of the repair into smaller monthly payments. If you have any questions, or wish to book your car in please visit us at www.autocentric.co.uk or call us on

Unit C0, Manor Way Business Park, Swanscombe, DA100PP

BPS Garage Services

5.0/5

BPS Garage Services was established over 20 years ago in Uttoxeter, we're a family-run business, specialising in all makes and models. Whatever the issue, we'll be able to help - including cars, motorbikes and vans. We also collect and deliver across the WHOLE of the UK! -TYRES -SERVICING -EXHAUSTS -BRAKES -TRACKING -RECOVERY -COMPUTER DIAGNOSTICS -ECU REMAPPING -TERRACLEAN

Unit 25, Bramshall Industrial Estate, Uttoxeter, ST14 8TD

TGPP-Autocare

5.0/5

TGPP-Autocare Stevenage, we pride ourselves on delivering high-quality car repair and maintenance services to keep your vehicle running smoothly and safely. Located conveniently in the heart of Stevenage, our garage is fully equipped with state-of-the-art technology and staffed by a team of Friendly experienced, certified technicians who are passionate about cars.

Unit 8, Chells Industrial Units, Stevenage, SG20LQ

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.