Car Diagnostics | Book a Car Diagnostic for your Audi

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 Audi models such as A3, Q3, A1, Q2, and Q4 e-tron. This service is completed at your home or workplace, following Audi 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 Audi

We’ll come to you at home or work

RAC Mobile Mechanic for your Audi

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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 Audi

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

DK Auto Repair

5.0/5

At DK Auto Repair, we are a team of skilled and certified automotive technicians dedicated to providing the highest level of service. Our goal is to take the stress out of auto repair by offering transparent, honest, and affordable solutions. Whether you’re in need of routine maintenance, major repairs, or emergency services, we are here to get you back on the road as quickly and safely as possible. Clutch repairs Electrical repairs Timing belts and chains Head gasket replacement Suspension and brakes Free vehicle check Injector refurbishment Bodywork repairs

Unit 3, Oak Lane, Littleport, CB61RS

The Motor Company, Bosch Car Service.

4.1/5

The Motor company, located in Tauton, is an independent garage that has been servicing and repairing all makes of car and light commercials since 1985 using factory trained technicians with state of the art tooling; this allows us to offer fleet companies and private individuals a one stop shop centred around excellent service with affordable pricing. During 2009 we relocated to their new site having outgrown the original premises (all be it a stones throw away), enabling them to expand their services into new and used car sales, bodyshop smart repairs, paint-less dent removal, interior trim repair on velour, leather, plastics, and fabric as well as a valet department and a bespoke parts department to name but a few. The new fully automated M.O.T bay and service centre has been designed to cater for all manufactures cars and light commercials all are serviced to the manufacturers standards; some of our partners include major fleet companies such as Wessex Water, British Gas, the Highways Agency and the One link platform. All these groups recognise the need for quality repairs, reduced vehicle down time with guaranteed workmanship at a reasonable cost (cheapest is not always the best). The Motor company have won the coveted Fleet Garage of the year several times; a credit to their staff and all concerned.

Cook Way, Bindon Road, Taunton, TA2 6BJ

Pak Motors Glasgow Ltd.

4.1/5

Pak Motors Glasgow Ltd , Scotland - South West PAK Motors has been operating since 2014. We are a local business for the local people and we care. The garage offers a 5 ramp workshop with 4 service ramps and 1 dedicated MOT ramp for class 4,5 & 7 testing. We are equipped with latest technology, excellent infrastructural facilities and a team of professional mechanics to solve every automobile-related need. Our high standard premium garage features quality services and state-of-the-art machinery and equipment to give you the service you deserve. We are able to work on all makes/models and repairs. In short, we are a one stop shop for all your motoring needs from a simple oil change or MOT to a major head gasket replacement we have you covered! We also are pleased to announce we offer a free collection/delivery service locally for our customers convenience Note: If you don't want to pay all of your bill in one go, no problem as we do offer Payment assist.

105-109 Whitefield Road, Glasgow, G512SD

GT Automotive Group ~ Sheffield

4.5/5

GT Automotive offers a comprehensive range of Aftersales services and vehicle repairs from our fully equipped onsite workshop. Our highly skilled and qualified technicians bring years of experience across multiple vehicle brands. Every vehicle that comes to us receives a FREE health check, including a full digital report for your peace of mind and safety. To make maintenance more manageable, we also provide 0% finance options over 3 or 6 months. Customers can relax in our comfortable waiting area with refreshments, or take advantage of our collection and delivery service available for local customers. As a proud family-run business, we’re committed to serving our local community with honesty, care, and exceptional service.

1 Orgreave Way, Sheffield, S139LS

JG Motor services Ltd

4.9/5

With nearly 20 years experience in the motor trade as a mechanic I decided to start my own company. We have experience on all makes and models but John was a master technician with Ford and a senior technician with Volvo. We work on both car and commercial including trailers and horseboxes. We offer a friendly and reliable service to all of our customers.

Unit 22 W And G Industrial Estate, Faringdon Road, Challow, OX129TF

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.