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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Grinding noise when reversing with AutoHold

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      01-31-2020, 02:15 PM   #1
newway
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Grinding noise when reversing with AutoHold

Hi fellow BMWers,

I am a new BMW owner for only 2 weeks, mine's a BMW 320i G20 M SPORT, this is my first auto car so I am still getting used to it.

Everything seems fine except this one small thing, I noticed that whenever I put the gear in R and start pressing the pedal, the car would make a moderate grinding noise (similar to that noise you hear when start driving after car wash/rain). Sometimes the noise also occurs when I start the engine and start turning the wheel. After I start driving the noise will go away, no noise e.g. after waiting for a red light.
This only happens when the auto-hold is on, if I turn off the auto-hold feature and do the manoeuvre (e.g. reversing) the noise also went away.

Is this normal?

Last edited by newway; 01-31-2020 at 04:01 PM.. Reason: typo
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      01-31-2020, 04:02 PM   #2
HighlandPete
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Is this on a very slow move off, as if the brakes are still partly engaged?

What if you are a bit quicker to move, still the same?
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      01-31-2020, 05:59 PM   #3
newway
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Quote:
Originally Posted by HighlandPete View Post
Is this on a very slow move off, as if the brakes are still partly engaged?

What if you are a bit quicker to move, still the same?
Good point, I will have a try later.
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      02-13-2020, 04:17 AM   #4
newway
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Just an update, I've been to the service center and I was told this is normal.
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      02-14-2020, 06:51 AM   #5
cnichols138
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Mine tends to lock up the rear brakes when its cold out. I can put it in gear and it just sits there until I give it gas to break the brakes loose. I hope that is normal.
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      02-14-2020, 08:56 AM   #6
vincechase
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I think this is movement in the opposite direction when the parking brake is applied to the rotors.

Happen to me a few times in a huracan I left the parking brake on and tried to reverse. So im sure its the same concept
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      02-14-2020, 09:20 AM   #7
VipinLJ
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Quote:
Originally Posted by cnichols138 View Post
Mine tends to lock up the rear brakes when its cold out. I can put it in gear and it just sits there until I give it gas to break the brakes loose. I hope that is normal.
Itís normal. All my cars do it when itís freezing outside.
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