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.

At A1 Diagnostics in Cardiff, we provide professional BMW timing chain services, combining experienced technicians with advanced diagnostic equipment to investigate faults and carry out the appropriate repairs. Whether you have noticed an unusual engine rattle, poor running or a dashboard warning light, our team can assess the cause and determine whether your BMW's timing chain requires attention. We check associated components, including tensioners and guides, to establish the work needed. With careful installation and checks after the repair, we help restore correct engine timing and reliable performance. Contact A1 Diagnostics to arrange a timing chain assessment for your vehicle.
If your BMW develops a fault with its timing chain or cambelt, depending on the engine fitted, you may notice one or more of the following symptoms:
* Clunking sounds
* Loss of power
* Jerking while driving
* Large bangs coming from under the bonnet.
These are classic signs that you have a problem.
The N47 2.0 diesel fitted to the 1 Series, 3 Series, 5 Series, X1 and X3 from around 2007, and the N57 3.0 diesel, both run a rear-mounted chain. So do the N20 and N26 petrol engines, which are better known for chain guide and tensioner wear. If your BMW is one of these, here is what to listen and look for:
• A rattle or whine from the BACK of the engine, near the bulkhead
• Worst in the first few seconds after a cold start
• A diesel that has started sounding harsher than it used to
• Rough running or a misfire once the timing has slipped a tooth
• Metal glitter in the oil filter at service time
Any of these on an N47 or N57 needs looking at now, not at the next service.
Lets cut straight to the chase. You have found an award winning BMW independent garage. Get in touch if you have any queries our team is ready to give you expert advice and are happy to help you with all your BMW timing chain needs.


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.
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.
We can change your timing belt on your BMW vehicle.
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.
We can replace the timing chain on your BMW vehicle from our garage workshop.

We have been trading for over 20 years and have gained major accreditations with well known motor companies.
Being approved by the TSI, the IMI, the RGI and the IGA should give you confidence that we are the turn to independent garage that can service your BMW vehicles timing chain or wet belt.
We have fully qualified BMW technicians certified by the IMI. This means if you have any timing chain or wet belt problem we can sort the issues out for you quickly at competitive rates.
Contact A1 Diagnostics
Get in touch today for expert advice or to book your BMW vehicle in for an appointment to assess the work that needs to be carried out on your timing chain, wet belt or cam belt. We can inspect your BMW vehicles timing chain and decide the best route to take.
A1-Diagnostics and ECU Repairs
64 Sloper Road
Leckwith,
Cardiff
CF11 8AB
Tel: (029 20) 220380
Fax: (029 20) 223172
Opening Times
Mon – Fri: 8:00am – 6:00pm
Email: info@a1-diagnostics.com
