08-04-2014, 11:27 AM | #1 |
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Potential Issue When Braking
Every time I brake from say 50-60 MPH down to a full stop I hear a humming sound. Is this normal? Should I be looking into this and reporting it to the dealership at the 1200mile break-in service or is this normal? Has anybody else experienced this?
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08-05-2014, 04:40 AM | #2 |
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In the manual it says that the brakes can make sounds under certain conditions so i think its normal.
My brakes can make a humming sound when i been braking hard but not when driving normal/slow ,i have the standard brakes. |
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08-05-2014, 05:45 AM | #3 |
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Same here but seeing as it only does it under hard braking I'm not as concerned as if it was on a consistent basis. But I will mention it at break in servicing.
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08-05-2014, 06:13 AM | #4 |
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08-05-2014, 09:55 AM | #5 |
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Thanks guys... I still haven't gotten around to reading the manual yet.
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08-05-2014, 10:42 AM | #7 |
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08-05-2014, 09:13 PM | #8 |
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Hummer
This is caused by the cross-drilled rotors. It will go away in time.
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08-05-2014, 09:14 PM | #9 | |
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08-06-2014, 07:00 AM | #10 |
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if the humming goes away actually the holes in your rotors are all clogged up with caked brake dust. need to poke that crud out. the humming noise is good!
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09-08-2014, 05:58 PM | #11 |
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Heard it as well on my ED for the first day but a trip up and down the alps seemed to solve it lol
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01-13-2016, 05:47 AM | #12 |
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Guys, 2000km and the humming noise is still happening. Took it in for service, they say that they've cleaned the back rotors, no difference. Still getting the sound, opinions at dealership service department is:
1- its normal, this is the sound of the differential. 2- we need to check other m3's 3- this is normal I find it weird to tell you the truth. Others riding in my car have noticed as well. Any ideas? |
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01-13-2016, 09:23 AM | #16 |
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01-13-2016, 09:26 AM | #17 | |
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01-13-2016, 12:37 PM | #18 | ||
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My M4 makes exactly the same noise on occasion but under moderate braking however the actual brake operation is normal and unaffected by the noise. And also not as a result of heavy braking previously it seems a bit random. At first it was a concern but I now ignore it. I've done about 1850 miles in the car so far so still new.
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01-15-2016, 01:11 PM | #21 |
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Hmm.. so it seems a lot of the forum members are experiencing the same thing! It just weirds me out though brake operation is normal as stated. I'd expect that a car of such value shouldn't have that noise.
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01-16-2016, 09:55 AM | #22 |
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There is another thread about this.
It seems to be the pad material used in the steel brakes.
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