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      02-21-2020, 09:30 AM   #1
RJJJ
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Hi guys, picked my car last month and noticed the m sport brake start to squeal during normal brakes this week. I found a video on YouTube, which is exactly the same problem. Normal brake has squeal, but no squeaking on hard brakes.



Can anyone help? It's very annoying! Many thanks!

Edited: I tried several hard stops from 40mph to 0. At the end of my drive the squeal disappeared. But not sure if the squeal will come back. Will try later when the brake is cold again.
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      02-21-2020, 09:49 AM   #2
thereef510
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i noticed this on our f15, and the CA said that some about of brake squeal is normal in the winter just because that's how the metal is? idk it didnt really bother me too much so I stopped noticing it
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      02-21-2020, 09:52 AM   #3
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well, hard brake every time, problem solved!

i would just take it into the dealership.
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      02-21-2020, 10:11 AM   #4
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Originally Posted by dream54ing View Post
well, hard brake every time, problem solved!

i would just take it into the dealership.
Does it have to be the dealership where I purchased the car? Or any BMW dealerships?
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      02-21-2020, 10:13 AM   #5
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Originally Posted by RJJJ View Post
Does it have to be the dealership where I purchased the car? Or any BMW dealerships?
Any BMW dealer, doesn't matter which one so pick your favorite. BMW honors their warranty at all their dealerships no matter where you bought it.
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      02-21-2020, 11:16 AM   #6
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Welcome to the M sport brakes from hell. Had the same issue with my 335i. No way to fix them other then the change the brake pads... once they wear unevenly, and the rotor starts to wear, you will get this squel. Never had the issue with any other car
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      02-21-2020, 11:37 AM   #7
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This is completely normal for high performance brakes. You'll notice the same noise, if not louder, with Carbon Ceramic brakes. Porsche did a nice explanation of this for their vehicles (though this easily applies to all high performance brakes, including those used in BMWs):

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      02-21-2020, 12:07 PM   #8
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Quote:
Originally Posted by martinf79 View Post
Welcome to the M sport brakes from hell. Had the same issue with my 335i. No way to fix them other then the change the brake pads... once they wear unevenly, and the rotor starts to wear, you will get this squel. Never had the issue with any other car
So sad. My car has only 700 miles so far, how can it starts to run unevenly. BTW, does the change of brake pad/ rotor due to noise covered under warranty? It should be right?
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      02-21-2020, 12:25 PM   #9
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Quote:
Originally Posted by RJJJ View Post
So sad. My car has only 700 miles so far, how can it starts to run unevenly. BTW, does the change of brake pad/ rotor due to noise covered under warranty? It should be right?
It should be covered under warranty if dealership confirm its a safety issue. According to a few, if its normal, it will be difficult to argue.

Quote:
Originally Posted by martinf79 View Post
Welcome to the M sport brakes from hell. Had the same issue with my 335i. No way to fix them other then the change the brake pads... once they wear unevenly, and the rotor starts to wear, you will get this squel. Never had the issue with any other car
We havent experience any noise with our G05 with Msport brakes, but our 4 series without Msport brakes does have the noise. Brakes on it is practically new, so not sure if its only the Msport brakes.

Quote:
Originally Posted by bluzbra View Post
This is completely normal for high performance brakes. You'll notice the same noise, if not louder, with Carbon Ceramic brakes. Porsche did a nice explanation of this for their vehicles (though this easily applies to all high performance brakes, including those used in BMWs):
If its normal, why doesnt it make the noise on most with Msport brakes? IMO, not normal on a car this new.
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      02-21-2020, 12:27 PM   #10
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Is the noise coming from only one side? did you try cleaning your brakes to see if its helps?
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      02-21-2020, 12:31 PM   #11
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Quote:
Originally Posted by dream54ing View Post
Is the noise coming from only one side? did you try cleaning your brakes to see if its helps?
Not sure. But when I rolls down the driver's side window, I can hear it clearly. Tried several hard stops yesterday at 40 mph. Then no more squeals at the end. But I am not sure if it will come back tonight when I drive it...
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      02-21-2020, 12:46 PM   #12
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Quote:
Originally Posted by dream54ing View Post
It should be covered under warranty if dealership confirm its a safety issue. According to a few, if its normal, it will be difficult to argue.


We havent experience any noise with our G05 with Msport brakes, but our 4 series without Msport brakes does have the noise. Brakes on it is practically new, so not sure if its only the Msport brakes.


If its normal, why doesnt it make the noise on most with Msport brakes? IMO, not normal on a car this new.
My 4 series without M-Sport brakes also makes the noise sometimes. It's not the case that every car with M-Sport brakes HAS to make the noise, but if it does (especially if the car is new), I wouldn't be alarmed. The squeaking noise is a natural side effect of the brakes, not an intended function of it. So it doesn't HAVE to make the noise, but it COULD make the noise. While some experience it, some may not. Depends on the brakes, the driver, weather, how hard you're braking, etc. If you take it to the dealer, I can almost guarantee they will advise it is operating as designed and there is nothing wrong with them.
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      02-21-2020, 01:13 PM   #13
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Someone linked this in another thread about brake squeals.



In that thread, they suggested that proper brake bedding would reduce or eliminate brake squeaks and squeals.
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      02-21-2020, 05:05 PM   #14
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I just ordered my 2020 X5 40i last Sunday, advisor strongly advised to remove the m-sport brake option. Other than looking cool he said they will squeak and produce a lot more dust than standard. Got virtually every other option ($78k msrp). Sorry this is an issue for you!
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      02-21-2020, 05:45 PM   #15
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Surprising no squeaks yet after 2,467 miles and quieter than my M550i but lots of dust LOL.

Did find this video from BMW M

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      02-21-2020, 09:10 PM   #16
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Quote:
Originally Posted by BMWDude2018 View Post
Someone linked this in another thread about brake squeals.



In that thread, they suggested that proper brake bedding would reduce or eliminate brake squeaks and squeals.
This. With any high performance brakes. The most important part (other than finding a safe stretch of road to do it) is not letting the car come to a complete stop between sessions while braking - this will indeed cause squealing down the road, so to speak. This process "burns in" and polishes the pads to the rotors so you don't have uneven or rough surfaces to brake against, causing squeal. A little noise is normal with high performance brakes - nature of the beast: large surface area, high pressure, quick stop.
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      02-21-2020, 11:38 PM   #17
RJJJ
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Quote:
Originally Posted by Eagl88 View Post
I just ordered my 2020 X5 40i last Sunday, advisor strongly advised to remove the m-sport brake option. Other than looking cool he said they will squeak and produce a lot more dust than standard. Got virtually every other option ($78k msrp). Sorry this is an issue for you!
Sigh, M50i come standard with m sport brake, no way to get rid of it....
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      02-21-2020, 11:39 PM   #18
RJJJ
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Quote:
Originally Posted by BMWDude2018 View Post
Someone linked this in another thread about brake squeals.



In that thread, they suggested that proper brake bedding would reduce or eliminate brake squeaks and squeals.
I followed the instruction. Now there is no squeaking, but not sure what will happen later.
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      02-21-2020, 11:41 PM   #19
RJJJ
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Quote:
Originally Posted by Paladin1 View Post
Quote:
Originally Posted by BMWDude2018 View Post
Someone linked this in another thread about brake squeals.



In that thread, they suggested that proper brake bedding would reduce or eliminate brake squeaks and squeals.
This. With any high performance brakes. The most important part (other than finding a safe stretch of road to do it) is not letting the car come to a complete stop between sessions while braking - this will indeed cause squealing down the road, so to speak. This process "burns in" and polishes the pads to the rotors so you don't have uneven or rough surfaces to brake against, causing squeal. A little noise is normal with high performance brakes - nature of the beast: large surface area, high pressure, quick stop.
Remind me of Porsche.... the biggest reason I didn't go for cayenne coupe was always brake squeal during test drive. Sadly M50i has the same problem.
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      02-22-2020, 09:07 AM   #20
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I notice mine with the m sport breaks on are noisy if they are not cleaned often. Once itís been washed itís fine after that
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      02-22-2020, 02:47 PM   #21
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Quote:
Originally Posted by hodgson-p@hotmail.co.uk View Post
I notice mine with the m sport breaks on are noisy if they are not cleaned often. Once it’s been washed it’s fine after that
Emmm, but does washing frequently cause corrosion?
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      02-22-2020, 03:02 PM   #22
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Try bedding in your brakes to see if that helps reduce the noise.
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