The best car servicing in Cardiff

Here at A1 Diagnostics we can provide you with the best car servicing in Cardiff on all types of vehicle brands but we also specialise in German manufactured vehicles like BMW, Mercedes, Bosch, Audi and Volkswagen from our garage workshop based at Sloper Road.


Our family run local business has access to dealer level expertise and diagnostic equipment to ensure your car only gets the best dealer-level service at affordable prices. We can save you money! Here is a great example.

Photographed below we have a Nissan vehicle that had a braking problem and the owner went to the main dealer to sort out the problem, the owner was quoted a price of £2500 to order the ABS pump which included the fitting of the part. With this being a high price the owner of the Nissan vehicle came to us and we were able to diagnose the problem, order in the part and fit the part all for £1000, we saved the vehicle owner £1500.




Our garage prides itself on looking after our customers and offering them the best deals possible, that’s why if a fault is found with your car during the MOT the retest will be free. Our main aim is to give you and your vehicle a first class service at an affordable price, and the business itself works to an Office of Fair Trade approved Consumer Code of Practice. This commitment to customer care gives you peace of mind in knowing that you are going to be given not only the best technical service, but also the best customer service.

Our technicians are trained on the latest technologies and have the most up-to-date diagnostic equipment to pinpoint any faults in your car as quickly and as accurately as possible. We invest in high quality professionals and specialist training for our qualified team. If we find a fault with a vehicle part then we will replace it with be of the same quality as those that were originally fitted on your vehicle.

We have years of experience in vehicle servicing and the knowhow to deal with all Car makes and models in Cardiff and South Wales, we understand that every vehicle is different and has specific needs. We want you to feel safe and confident in your car and vow not to cut any corners to achieve this. We have built up a reputation for being a vehicle service garage that you can trust.

Contact A1 Diagnostics

Please use the contact details below to enquire we are happy to help:


A1-Diagnostics and ECU Repairs
64 Sloper Road
CF11 8AB

Tel: (029 20) 220380
Fax: (029 20) 223172

Opening Times

Mon – Fri: 8:00am – 6:00pm


Read more:
Five reasons to get your brakes serviced with A1 Diagnostics

It is very busy at our vehicle service garage with vehicles coming and going out of the garage every day...