• 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.
  • MOT Service Cardiff

    MOT Service Cardiff

    A1 Diagnostics provide MOTs In Cardiff to the Public and Private Sectors. With our highly qualified MOT team your car is in safe hands
  • About A1 Diagnostsics

    About A1 Diagnostsics

    Read more about the services we offer here at A1 Diagnostics.
  • 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.
  • Car Servicing Cardiff

    Car Servicing Cardiff

    Get your car serviced efficiently and quickly at A1 Diagnostics in Cardiff
  • ABS Repairs Cardiff

    ABS Repairs Cardiff

    Anti-Lock Breaking System (ABS) can also be a costly repair to your car in Cardiff
  • Air Conditioning Servicing Cardiff

    Air Conditioning Servicing Cardiff

    Having the state of the art air conditioning unit means looking after it and having it checked once a year
  • ECU Repairs Cardiff

    ECU Repairs Cardiff

    ECU Repairs Cardiff are able to rebuild, test and remanufacture ECU units on our test bench in Cardiff
  • Electrical fault service Cardiff

    Electrical fault service Cardiff

    Electrical fault service Cardiff can help diagnose your electrical fault problems in Cardiff
  • Engines and Gearboxes Cardiff

    Engines and Gearboxes Cardiff

    We can repair, rebuild and offer many engine and gearbox services from our Cardiff based vehicle service garage. Contact us for any advice needed we are happy to help.
  • Immobiliser Repairs Cardiff

    Immobiliser Repairs Cardiff

    A1 Diagnostics and ECU repairs can fix your immobiliser repair problems quickly
  • Key Coding Cardiff

    Key Coding Cardiff

    Key Coding Cardiff can be done at A1 Diagnostics Cardiff
  • Car Recovery Cardiff

    Car Recovery Cardiff

    Broken down in the Cardiff, South Wales area? Choose Car Recovery Cardiff at A1Diagnostics
  • 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 can supply, repair, fit and recondition BMW gearboxes

We are an independent BMW gearbox supplier, fitter, reconditioner and BMW gearbox repairer in Cardiff


We are an independent garage and are experts in supplying BMW gearboxes, carrying out repairs on BMW gearboxes, fitting BMW gearboxes and reconditioning BMW gearboxes from our BMW gearbox garage workshop shown below.

Our Gearbox garage

We have mentioned four main gearbox services that we carry out. Here is more information on each service highlighted below.

BMW gearbox repairs – Service 1


We are experts in BMW gearbox repairs. If you are experiencing problems with your BMW car or vehicles gearbox then contact us. We service hundreds of BMW gearboxes from our independent garage quickly and at affordable prices.

Our gearbox mechanics repairing a BMW gearbox

If your gearbox is badly damaged don’t worry we can pull from the heavy gearbox stock shown below.

BMW gearbox stock

BMW gearbox supply- Service 2


If you are an independent garage in Cardiff, Wales or the UK we can supply you with reconditioned quality BMW gearboxes. We offer a trade service to other independent garages and have reliable gearbox companies sourcing to us at the right prices enabling us to pass on the price advantage to your customers. Our commitment to substantial gearbox stock is shown on our racking shelves below.

BMW gearboxes on our racking shelves

BMW gearbox reconditioning – Service 3


We can recondition your BMW gearbox. If you are having problems with your BMW gearbox then it may need reconditioning. We have all of the expert equipment and years of industry knowledge in reconditioning gearboxes. If you are an independent garage and need support in reconditioning gearboxes then we are here to help you, support you and form long term relationships with you.

Here are photos of our mechanics working on reconditioning both an automatic and manual gearbox.

Our mechanics working on reconditioning a BMW automatic gearbox

A BMW manual gearbox being reconditioned

BMW gearbox fitting – Service 4


We not only recondition BMW gearboxes but we can repair, recondition and fit them to your BMW vehicle and BMW car. Our mechanics (pictured below) are experts in gearbox fittings and have years of industry knowledge in BMW gearbox fittings.

Our BMW gearbox mechanics fitting a BMW gearbox

We ensure all of our BMW gearbox work carried out is done so at affordable prices.


We have been established for many years in the motor industry and vehicle service trade. We want to form long term relationship with our customers and we know we can only do that by offering our services at the right prices.

Because we are able to source BMW gearboxes from companies and buy big we can pass pricing advantages on to our customers. Check out the BMW gearbox stock we have access to shown in the photo below.

Because we have access to such stock means we can deliver quickly within a few days, we are only to aware that you need the BMW gearboxes quickly so that you can service your customers quickly. Happy customers mean they keep coming back to the garage.

Contact A1 Diagnostics


Get in touch today for expert advice or to book your vehicle in for an appointment we are happy to help you with any BMW gearbox queries you have.

Our BMW gearbox garage 

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

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

Opening Times

Mon – Fri: 9:00am – 6:00pm

Email: info@a1-diagnsotics.com