Car Diagnostics | Book a Car Diagnostic for your Lexus

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 Lexus models such as NX, RX, UX, ES, and IS. This service is completed at your home or workplace, following Lexus 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 Lexus

We’ll come to you at home or work

RAC Mobile Mechanic for your Lexus

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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 Lexus

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

Quadpoint Motor Service Ltd t/a RS Autos

4.9/5

We are a family run garage based in Farnworth, Bolton with more than 30 years of experience. We provide a range of service from mot's, diagnostic checks, repairs of all types -tyres, clutches engine faults, brakes bulbs, air con, general services and much more for cars, vans and light commercial vehicles. Our highly experienced mechanics strive to ensure that you receive a top quality, value for money service.

Unit 2 Gladstone Road, Farnworth, Bolton, BL47ED

Cambridge Smart Cars

4.8/5

Cambridge Smart Cars LTD are a used car dealer and autocentre based in Fulbourn, Cambridge. We are proud to offer you a full range of services which include vehicle MOT, Servicing and Tyres at very competitive rates, so please have a look through our current stock or book your existing vehicle in for repairs and maintenance. At Cambridge Smart Cars LTD, we try to stock a range of used cars and even vans, we could find you your next vehicle, just let us know what you are looking for. We will go the extra mile to guarantee that you receive the best customer service and advice you need to keep your car safe and reliable. We have a great customer base and this is the reason many of our customers keep coming back to us.

3-6 Breckenwood Road, Fulbourn, CB21 5DQ

Bismillah Garage Services Ltd

4.2/5

Bismillah Garage Services is a family business, well established and respected MOT & car service garage in Luton also supplying replacement automotive parts such as exhausts, brakes spark plugs, oil filters and tyres. We undertake car servicing and repairs that including computer diagnostics, brakes, clutches etc. Regular car servicing can extend the life of a vehicle considerably and can save money. We focus on providing an exceptional garage service with competitive pricing. We have been serving customers in the Luton for 15 years. We have an up-to-date, fully equipped test centre, with all the facilities to service and repair your vehicles. We have built a solid reputation in Luton for delivering high quality garage services tailor made to meet the needs of our clients. Much of our business comes from word of mouth and satisfied repeat customers.

2A Tudor Road, Luton, LU3 1RN

N and V Automotive LTD

5.0/5

At N and V Automotive Ltd, we are proud to serve drivers in Tipton with a complete range of garage services. With over 15 years of experience, we combine technical expertise with a customer-first approach to deliver outstanding results every time. Our goal is to make every visit stress-free and ensure your vehicle receives the care it deserves. We understand that your car is essential to your daily life, which is why we offer services designed to keep it running smoothly and safely. Whether you need an MOT, servicing, or repairs, our team ensures your vehicle is safe, reliable, and performing at its best. We offer a full range of garage services designed to keep your car running smoothly: MOT Testing – Thorough checks to keep your vehicle road legal and compliant. Servicing – Interim, full, and major services tailored to your needs and driving habits. Repairs – From clutch replacements to general mechanical fixes, we handle it all. Diagnostics – Using Autel and Bosch KTS equipment for accurate fault detection and quick solutions. Added Convenience for Every Visit We make your life easier with: Free refreshments (tea & coffee) while you wait Comfortable waiting area designed for your comfort Free Wi-Fi so you can stay connected 10% discount for NHS staff as a thank you for their service

Unit 4A, Alexandra Industrial Estate, Locarno Road, Tipton, DY49SJ

Auto Solutions albion

4.8/5

AUTO SOLUTIONS is a family run garage which has been trading for over 25 years Based in East Kilbride, we are a well established and reputable company in the local area. All 3 of our time served technicians are IMI registered. We have the latest snap-on 3D wheel alignmetnt system and snap-on diagnostic equipment We cover East Kilbride and surrounding areas for car servicing and repairs, MOT testing and vehicle breakdown recovery. check our 100% feedback . Certificates Our certificate of registration for the Motor Industry Code of Practice means we comply with guidelines set out by the registered body. We are also a Servicesure certified garage which means we offer a national warranty.We offer low cost servicing that won't affect your warranty, meaning you won't have to pay dealership prices. This work is carried out according to the Block Exemption guidelines, which state that if car parts of a similar or better quality are used, then your warranty is unaffected. This allows us to offer you a fantastic service at a fantastic price! MOT Testing in East Kilbride As a VOSA registered testing station, we offer MOT testing in East Kilbride at a competitive price. We pride ourselves in offering mechanic apprenticeships on an ongoing basis. We feel it is important to bring young talent into the industry and help develop apprentices into fully qualified and professional mechanics that will provide an excellent service for you. To find out how to get involved with an apprenticeship, just send us a message!

20 Albion Way, East Kilbride, G750YN

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.