Car Diagnostics | Book a Car Diagnostic for your Nissan

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 Nissan models such as Qashqai, Juke, Leaf, X-Trail, and Ariya. This service is completed at your home or workplace, following Nissan 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 Nissan

We’ll come to you at home or work

RAC Mobile Mechanic for your Nissan

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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 Nissan

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

Tyre King Autocentres Long Eaton

5.0/5

At Tyre King autocentres, we are your trusted local mechanics, committed to keeping you safe on the road. With years of hands-on experience and a team of fully qualified technicians, we specialise in delivering top-quality vehicle maintenance, repairs, and diagnostics at competitive prices. Our workshop is fully equipped with the latest tools and technology, allowing us to handle everything from routine servicing to complex mechanical issues—quickly, efficiently, and to the highest standards. Our Specialities We offer a full range of professional automotive services, including: MOT Testing (Class 4) Fast, reliable MOTs to ensure your vehicle meets all legal and safety standards. Servicing (Interim & Full) Regular servicing to keep your car running smoothly, improve fuel efficiency, and avoid costly repairs down the line. Brakes Complete brake inspections, repairs, and replacements using high-quality parts for your safety. Tyres Supply, fitting, balancing, and alignment of new tyres from leading brands. We also handle puncture repairs. General Repairs From cooling and exhausts to suspension and diagnostics, we fix it all—honestly and efficiently. Why Choose Us? . Experienced Technicians Our mechanics are highly trained and experienced with all makes and models. . Transparent Pricing No hidden costs. We provide clear quotes and explain all work before we begin. . Customer-Focused Service We pride ourselves on honesty, reliability, and friendly service. Your satisfaction is our top priority. . Quick Turnaround We know your time is valuable—most jobs are completed same-day. . Local & Trusted Proud to be part of the local community, with many loyal customers and 5-star reviews.

Phoenix Mills, Nottingham Road, Long Eaton, Nottingham, NG102AA

BRS Automotive

4.7/5

Welcome to BRS Automotive, Banbury's trusted and award-winning garage. Proudly securing the 'Best Garage In The South East' title from whocanfixmycar.com in 2019 and 2022, we are delighted to announce our recent accolade as the 'Best RAC Garage of 2024'. Our comprehensive range of services includes mechanical repairs, maintenance work, servicing, and MOT. Rest assured, your vehicle is in capable hands with our technicians, who hold Senior ATA accreditation levels and boast years of industry experience. Booking with BRS guarantees you the peace of mind that comes with our commitment to excellence. While specializing in sports and performance cars such as Jeep, Mercedes, and Porsche, our expertise extends to all makes & models and small vans. We pride ourselves on using only quality parts, ensuring your vehicle leaves our premises in peak condition. At BRS Automotive, customer service takes precedence. We are dedicated to providing the best service and experience for all our clients. When you choose BRS, you choose a team that prioritizes your satisfaction and consistently delivers excellence in every aspect of our work. Experience the difference with BRS Automotive – where skill, quality, and exceptional customer service converge to redefine your automotive service expectations.

Unit 1 Thorpe Way, Banbury, OX164SP

Town Garage.

4.5/5

We are an established local independent garage and are proud to be members of Autofirst Network – a nationwide network of independent garages operating to the Network’s 6 core values of Capability, Consistency, Care, Clarity, Cost Effectiveness and Customer Focus. For your added peace of mind we are members of the Motor Ombudsman service which is approved by The Trading Standards Institute. We are a independent family run business established in 1976. We are proud members of CVTS & Good Garage Scheme. We are based at old Town Llantrisant. We have vast experience in most aspects of vehicle maintenance and repairs. We work on anything from a classic Ford Escort and Mini to modern vehicles and vans. We have 2 MOT bays. We have modern technology to be able to repair newest vehicle, reset service lights, diagnostics to traditional techniques that sometimes a old fashioned approach may be required. Whatever your needs we hope that Town Garage of Llantrisant will be able to sort.

Newbridge Road, Llantrisant, CF728EX

Ackworth Autoserv

5.0/5

The team at Ackworth Autoserv are positive that a pit stop at their new premises will leave you feeling more than satisfied. The highly successful business has moved into a larger building, on Winfield Industrial estate, kitted out with the latest in diagnostic equipment, from the industry's leading suppliers.Company director James Matthews leads a team of highly qualified and dedicated individuals, ready to provide an excellent service at competitive prices.James, an authorised MOT inspector, said: I have sold cars, repaired cars, done everything with cars for almost 15 years. We now have a state-of-the art facilities to offer the best service.

Unit 1 Unit 11, Winfield Industrial Estate, Wakefield Road, Ackworth, Pontefract, WF7 7AA

R&S Services RAC Approved Garage

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

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.