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535kjp 05-15-2019 05:39 AM

Warped rotors?
Hey all,

I have a 2018 330i with 6.5k miles on it. Began to realize that you hear the brakes rumbling between 65-80mph. It hasn't gotten to the extent that it shakes the entire car yet, so if the music is loud enough, it's not particularly noticeable.

Are warped rotors covered under warranty this early? I know BMW removed brakes/rotors from maintenance, but this doesn't seem like regular wear and tear to me. I generally don't do too much spirited driving, and don't slam on my brakes so I'm a bit confused

Doug Huffman 05-15-2019 07:17 AM

It is unlikely that YOU can warp a 25 mm rotor. More likely you have deposited pad material stuck and making high spots.

John in VA 05-15-2019 07:56 AM

What Doug said. You need to do a few "panic stops" to remove any pad deposits that have accumulated.

pshovest 05-15-2019 09:17 AM

Very unusual for factory pads to leave deposits, they are incredibly abrasive and scrub the rotors well. If you can feel the shake, you've got a braking performance issue. Car should be under factory warranty. Complain to dealer when several aggressive stops from 70 - 0 MPH don't fix it.

Doug Huffman 05-15-2019 09:25 AM

Aggressive stops from 70 MPH to 5 MPH. Do not leave the pads resting on a stinking hot disc.

pshovest 05-15-2019 10:34 AM


Originally Posted by Doug Huffman (Post 13001289)
Aggressive stops from 70 MPH to 5 MPH. Do not leave the pads resting on a stinking hot disc.

Absolutely correct.

John MS 05-16-2019 09:21 AM

The rotors may also have developed a glaze which gives a shuddering sensation. Doug's remedy should work.

535kjp 05-17-2019 04:40 PM

I tried the 70-5 a few times. Still feels a little uneven but its pretty bearable now

charlesberry 05-17-2019 05:27 PM

I've had this a few years back, I took the rotors and cut them. Problem solved.

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