Hi,

 

I've just purchased a 20 plate BMW M135i. It's really nice, everything is in good condition but the only thing that's bothering me is there's a tapping / clicking / rattling noise when I'm accelerating coming from what sounds like the engine bay somewhere near the drivers side front wheel. I have had it in the garage and they said there's absolutely nothing wrong with it. I'm just wondering if anyone else has had the same issue, if so if you had managed to work out what was causing it and if required what was done to fix it? I don't think it's anything major in terms of the engine or anything failing. It's more just irritating, so if I can fix it I will do. 

 

Thanks,

Niall

Hi Niall

Welcome to the Forum

As your car should smooth and quiet some things to try in order to narrow down where the noise is coming from

First is it quiet and smooth when stationary engine running, if engine revs are increased is it still quiet and smooth. If it is then that rules out belts tensioners or pulleys. Last make sure nothing is touching the engine fan 

Next drivers wheel off and check for any loose under guards . While the wheel is off check the back plate and calliper are the pads loose/rattling. Fiddly but check at the back of the hub that nothing is caught in the reluctor ring, last spin the disc by hand and listen for any noises from the wheel bearing

Good Luck tracking it down

Dave

Hey mate,

Widely known issue that these engines have wastegate actuator issues. There’s been a “fix” coming from BMW for 2 years according to some UK forums. Some users have pushed BMW directly for a fix and had replacement drive belts, tensioners and cover fitted to snug up the area. It has no impact on performance, it’s just annoying. Here’s a thread for more:

https://www.babybmw.net/threads/ticking-rattle-on-acceleration.143097/