F10 525d strange noise.
Discussion
Noticed this two days ago. Under acceleration, at about 3000rpm, the engine makes a groaning, growling throaty noise. It sounds how you would expect a vibration to sound, but there is no feeling of that.
It's somewhat noticeable when you rev the engine but much more noticeable when on the move. It's a noise you can clearly hear throughout the whole cabin.
Removing the top plastic cover makes it much more noticeable. I thought the cover being loose was the problem at first, but it sounds worse without it. It seems to sit on top of the air filter and has a lot of fur/protection on the underside which I assume is drowning out the noise.
The noise sounds like it's coming from the top of the engine, rather than an idler pulley at the side/front.
It's the 2.0 version from 2013. It's only done 38k. It's under warranty until November with BMW, so I might just leave it until it breaks, but i'm curious as to what it might be?
It's somewhat noticeable when you rev the engine but much more noticeable when on the move. It's a noise you can clearly hear throughout the whole cabin.
Removing the top plastic cover makes it much more noticeable. I thought the cover being loose was the problem at first, but it sounds worse without it. It seems to sit on top of the air filter and has a lot of fur/protection on the underside which I assume is drowning out the noise.
The noise sounds like it's coming from the top of the engine, rather than an idler pulley at the side/front.
It's the 2.0 version from 2013. It's only done 38k. It's under warranty until November with BMW, so I might just leave it until it breaks, but i'm curious as to what it might be?
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