Weird electric noise after restarting car

R3dliner · 09-12-2016, 10:24 AM

I heard this weird electric winding noise yesterday coming from the drivers side hood area. I shut the car down only to restart it right away to fix my parking and this electric grinding noise was loud for like 2-3 seconds and disappeared. I will add car was fully warmed up after doing another restart right away. Doesn't do it all the time.

The noise is never present on cold startups. If I wait for a minute noise is not there. Only when restarting right away.

What could be located on that side of the engine bay that can be making this noise? I will try to get some vids up.

gfisher99 · 09-12-2016, 02:51 PM

Does it sound like it's inside the driver's side door? There's a vacuum booster pump in there that comes on if you press the brakes hard-ish a few times really quickly. Mine does it quite a bit when I'm pulsing the brakes, usually when backing out of my garage.

R3dliner · 09-12-2016, 02:54 PM

Quote:

Originally Posted by gfisher99

Does it sound like it's inside the driver's side door? There's a vacuum booster pump in there that comes on if you press the brakes hard-ish a few times really quickly. Mine does it quite a bit when I'm pulsing the brakes, usually when backing out of my garage.

I can't remember if I was pressing the brake or not(6mt) but the noise seems like its coming from the drivers fender area.

gfisher99 · 09-12-2016, 02:55 PM

Get in and smash the brakes a few times and see if it's the same noise. Usually really easy to replicate.

R3dliner · 09-12-2016, 04:09 PM

Quote:

Originally Posted by gfisher99

Get in and smash the brakes a few times and see if it's the same noise. Usually really easy to replicate.

Thank you very much. Same noise when I pumped the brake couple of times. I'm assuming this noise is normal?

09-12-2016, 10:24 AM	#1
R3dliner Lieutenant Colonel 935 Rep 1,930 Posts Drives: 18 M3 6MT Join Date: Mar 2016 Location: NYC iTrader: (5)	Weird electric noise after restarting car I heard this weird electric winding noise yesterday coming from the drivers side hood area. I shut the car down only to restart it right away to fix my parking and this electric grinding noise was loud for like 2-3 seconds and disappeared. I will add car was fully warmed up after doing another restart right away. Doesn't do it all the time. The noise is never present on cold startups. If I wait for a minute noise is not there. Only when restarting right away. What could be located on that side of the engine bay that can be making this noise? I will try to get some vids up. Last edited by R3dliner; 09-12-2016 at 12:14 PM..
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09-12-2016, 02:51 PM	#2
gfisher99 Lieutenant 287 Rep 562 Posts Drives: '11 E92 M3, '18 M2, '22 X3M Join Date: Feb 2016 Location: Austin, TX iTrader: (0)	Does it sound like it's inside the driver's side door? There's a vacuum booster pump in there that comes on if you press the brakes hard-ish a few times really quickly. Mine does it quite a bit when I'm pulsing the brakes, usually when backing out of my garage.
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09-12-2016, 02:55 PM	#4
gfisher99 Lieutenant 287 Rep 562 Posts Drives: '11 E92 M3, '18 M2, '22 X3M Join Date: Feb 2016 Location: Austin, TX iTrader: (0)	Get in and smash the brakes a few times and see if it's the same noise. Usually really easy to replicate.
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