• 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.

BMW Timing Chain, Timing Belt and Cam Belt repair, replacement, maintenance and service


The timing chain, timing belt and cam belt are a crucial part of your BMW engine. If these components fail your BMW car or BMW vehicle will come to a grinding halt. Sudden engine stops when the timing chain, timing belt or cam belt fail can lead to expensive engine damage.

BMW Timing Chain, Timing Belt and Cam Belt replacement, change, maintenance, repair and servicing from our garage workshop 

Here are a few helpful tips to help you recognise when you need to bring your BMW car or BMW vehicle in for a timing belt, timing chain or cam belt maintenance and service.


– It is advised that when your BMW car hit’s 40,000 miles when out on the road you should get your timing chain, timing belt or cam belt checked over. Leaving these components clock more miles without being checked can lead to failure causing more damage to your BMW car or BMW vehicle.

– If you are hearing big clunky noises coming from the engine then this is a sign that you have a timing chain, timing belt or cam belt problem on the engine.

– If your BMW car or BMW vehicle comes to a grinding halt, then sadly the likelihood is the timing chain, timing belt or cam belt has snapped and this is the cause for loss of drive.

– Heavy vibrations are a classic sign that you are having problems with the timing chain, timing belt or cam belt.


We service hundreds of BMW timing chains, timing belts and cam belts every year. If you think you have a problem then get in touch, we are here to help.

BMW Cam belt change and cost


We can beat the competition on price when it comes to cam belt cost. We can change the Cam belt and fit the cam belt to your BMW car or BMW vehicle. So get in touch and get a quote from us at our garage workshop shown below.

We carry out BMW Cam belt replacements at great costs and and prices 

BMW Timing belt change


We can change your timing belt on your BMW vehicle. The photo below shows our garage facility where we can service 10 to 15 cars a day.

BMW Timing belt change or repair from our garage workshop 

BMW Timing belt cost


We can match or beat any timing belt cost. We offer a first class service and invest in the best vehicle technology ensuring reliable vehicle servicing from our garage workshop shown below.

BMW timing belt costs are kept to a minimum from our garage workshop 

BMW Timing chain replacement


We can replace the timing chain on your BMW vehicle from our garage workshop. Here are photos of our mechanics recently replacing a timing chain on a vehicle.

We carry out BMW timing chain replacements from our garage workshop

We carry out BMW timing chain replacements at the best prices from our garage workshop 

Contact A1 Diagnostics

Get in touch today for expert advice we are here to help with any BMW timing chain, BMW timing belt and BMW cam belt related topics you have.

Our garage where we service and repair BMW timing chains 

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