• Independent German Car Specialists

    Independent German Car Specialists

    Welcome to A1 Diagnostics. We are a BOSCH vehicle service garage based in the heart of Cardiff offering professional vehicle servicing from our garage workshop.
  • We service all brands of vehicles

    We service all brands of vehicles

    We specialise and service all makes of vehicles especially German manufactured vehicles.
  • Professional Mechanics

    Professional Mechanics

    Our mechanics are trained on the latest technologies and have the most up-to-date diagnostic equipment to pinpoint any faults. Our mechanics work together as a team and have years of combined experience in the motor trade.
  • We have a state of the art vehicle electronics bay

    We have a state of the art vehicle electronics bay

    We have our own electronics bay to diagnose electronic related vehicle problems. From electrical engine faults to ECU repairs we have all the equipment needed to repair electrical faults in your vehicle.
  • Cosmetics vehicle service

    Cosmetics vehicle service

    If you have scrapes and scratches in the interior we can repair them for you leaving your vehicle looking as good as new.
  • We are experts in gearbox rebuilds and repairs

    We are experts in gearbox rebuilds and repairs

    We have extensive experience in gearbox rebuilds, reconditioning and repairs at competitive prices.
  • We are experts in engine rebuilding and repairs

    We are experts in engine rebuilding and repairs

    We rebuild and repair hundreds of engines every year. Contact us if you have any engine issues we can help.
  • MOT vehicle testing

    MOT vehicle testing

    We have two MOT test lanes and offer affordable MOT servicing. Contact us if you have any queries.
  • Brake servicing at affordable prices

    Brake servicing at affordable prices

    We service brakes of many vehicle brands and types. Contact us for any advice on brake problems you may be having.
  • We do breakdown recovery

    We do breakdown recovery

    If you do not have breakdown cover don't worry we can pick your vehicle up repair it and return it to you. Contact us for any advice needed.
  • Air conditioning vehicle servicing

    Air conditioning vehicle servicing

    We can help you stay cool and ensure your vehicles air conditioning is working perfectly. Contact us for any advice needed.

We are experts in vehicle and car repair here in Cardiff

Car Repair Cardiff Links
Contact A1 Diagnostics

Experts in vehicle maintenance, repairs and servicing

If you are enquiring about your vehicle then you have come to the right place. We are specialists in servicing, repairing and maintenancing vehicles of all brand types especially German manufactured vehicles from Audi, Mercedes, BMW, Volkswagen and more.

We can carry out a whole range of services from gearbox repairs, engine rebuilds and not just the big stuff we can also carry out smaller repair work from electric window faults and seat problems. There is literally no job too small or too big for us.

We can get your vehicle back out on the road in no time at all at the best prices. We have all of the facilities, investment in the best mechanics and technology to ensure we offer you the best vehicle servicing at fantastic prices from our garage workshop shown below.


From our garage workshop we can MOT your vehicle or carry out any necessary repair work needed. We have all of the top facilities and investment in technology to offer you the best and most reliable vehicle servicing in Cardiff.

We were recently audited by BOSCH Service and passed the audit with flying colours being awarded with a certificate of acknowledgment for car service quality and outstanding results produced from our service garage.



If you need any advice regarding your vehicle why not give us a call, drop us an email or visit our garage we are happy to help, we have years of experience in the vehicle servicing trade and can help you with any queries. If you want to learn even more about our vehicle service centre then read some of our latest blog posts displayed below.

Learn more about our garage workshop

If you would like to read more on our services and some of the great reviews we have gained from happy customers follow the links below for more information.





Contact Us

We are here to help you with any vehicle advice that you need and 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: 9:00am – 6:00pm

Sat: 9:00am – 1:00pm

Email: info@a1-diagnostics.co.uk