We are German car specialists

Looking for a Cardiff garage where you will receive a friendly, honest and expert service? At A1 Diagnostics, we offer the complete package for your German car: from bulb and battery replacement to engines, gear boxes and MOTs. We work to the highest standard to deliver main dealer expertise, at an affordable price from our garage workshop pictured below at Sloper Road.



The independent experts

We are an independent Bosch Car Service garage in Cardiff working to the most exacting standards. All our technicians receive the latest training and use state-of-the-art technology and diagnostic equipment to pinpoint faults, quickly and accurately. Any replacement parts we use are the same quality as those originally fitted to your vehicle.

We deliver an exceptional standard of service on all German vehicles, including Audi, BMW, Mercedes and Volkswagen (both cars and campers), as well as Vauxhalls. You might not think of Vauxhalls as German cars, but their largely engineered by the German firm Opel, General Motors’ German subsidiary.

Car service options

With a culture of quality, continuous improvement and working in line with the OFT code of conduct, we put our expertise to good use to provide the following high level services:

ECU Repairs – Electronic control unit faults on German cars can prove costly to fix. At A1 Diagnostics, we have the specialist knowledge to remanufacture many failing units, saving our customers hundreds of pounds. We also offer a two year warranty on all ECU repair work.

MOTs – As a fully approved Cardiff MOT centre, we offer MOT packages on all family cars and light vehicles to approved VOSA standards for just £99.

Servicing – High quality servicing from an independent German vehicle specialist can add years to the life of your vehicle or fleet. Attention to detail and the latest, dealer approved diagnostic equipment ensures the best workmanship at a price that would make the main dealers’ blush.

ABS repairs – Another potentially costly repair. Our Cardiff based ABS repair team work quickly and effectively to identify a fault before finding, testing and implementing the most affordable solution.

The benefits of servicing from independent German car specialists

All work is completed to the manufacturer’s specification, using replacement parts that are the same quality as those originally fitted to your vehicle

Our technicians are highly skilled and receive regular specialist training

We use only the most-up-to date diagnostic equipment to identify and pinpoint potential problems before they arise

Receive a main dealer quality service, without the nasty bill.

Contact A1 Diagnostics

Please enquire or book an appointment using the contact details below:


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

Email: info@a1-diagnostics.com

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