Strange noise during breaking and acceleration

TheM3Boy · 02-08-2013, 01:18 PM

I have a 335 and when I break a little harder than normal I hear that strange noise, it is very hard to describe. It sounds like something is sliding, almost like a metal piece(s) sliding forward. When I accelerate after that I hear that same sound, like it is sliding back. The car drives and breaks absolutely perfect otherwise so I have no clue what could it be. The front breaks were changed and have only about 1000km on them.

In the video, on the 34-35th seconds of the clip (3 seconds after I say "break") the noise is most pronounced but you can hear it also on the 6-7th seconds during acceleration.

Any suggestions !?!

BillionPa · 02-08-2013, 07:05 PM

I am gonna guess there is something under the engine, on top of the plastic shield... like a wrench. The audio is not quite clear enough, but I have heard similar sounds when crap like pebbles and road salt gets trapped on that shield

TheM3Boy · 02-09-2013, 07:34 AM

That will be difficult to check without lifting it so I should probably take it to a garage but it kind of makes sense.

I bought the car recently and the front breaks were changed just before I got it because they were almost gone and I asked them to. I don't know what kind of pads they put.I was wondering if say they installed cheap break pads, could it be coming from them?

02-08-2013, 01:18 PM	#1
TheM3Boy Private 36 Rep 75 Posts Drives: 335i M-Sport Join Date: Apr 2012 Location: Mississauga, ON, Canada iTrader: (0)	Strange noise during breaking and acceleration I have a 335 and when I break a little harder than normal I hear that strange noise, it is very hard to describe. It sounds like something is sliding, almost like a metal piece(s) sliding forward. When I accelerate after that I hear that same sound, like it is sliding back. The car drives and breaks absolutely perfect otherwise so I have no clue what could it be. The front breaks were changed and have only about 1000km on them. In the video, on the 34-35th seconds of the clip (3 seconds after I say "break") the noise is most pronounced but you can hear it also on the 6-7th seconds during acceleration. Any suggestions !?! Last edited by TheM3Boy; 02-08-2013 at 05:53 PM..
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02-08-2013, 07:05 PM	#2
BillionPa Second Lieutenant 2 Rep 288 Posts Drives: 335i Join Date: Feb 2013 Location: USA iTrader: (0)	I am gonna guess there is something under the engine, on top of the plastic shield... like a wrench. The audio is not quite clear enough, but I have heard similar sounds when crap like pebbles and road salt gets trapped on that shield
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02-09-2013, 07:34 AM	#3
TheM3Boy Private 36 Rep 75 Posts Drives: 335i M-Sport Join Date: Apr 2012 Location: Mississauga, ON, Canada iTrader: (0)	That will be difficult to check without lifting it so I should probably take it to a garage but it kind of makes sense. I bought the car recently and the front breaks were changed just before I got it because they were almost gone and I asked them to. I don't know what kind of pads they put.I was wondering if say they installed cheap break pads, could it be coming from them?
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