[STLBT]

Hey, everyone. Picked up a CPO 2023 540i xdrive (13k miles) about a month ago and have put on about 500miles since. Yesterday I noticed a brake squeal at low speeds what sounds like coming from the front. My last audi was notorious for this because of the metallic pads but wanted to check to see if this is an issue on the G30.

With it being a CPO, I assume that pads and rotors passed inspection.

Thoughts?

[w1zk1d]

This is a pretty common BMW issue with M Performance brakes and there are endless posts about this. I, too, have the same unresolved squeaking issue. I bought my 2020 M550i used and had the stealership change the brake pads, etc. but still have squealing. There are many many threads about this and many frustrated BMW owners, not just for G30 series. However, not all BMW owners experience this which is even more puzzling. The only way I can temporarily resolve this is by power washing my wheels/brakes, but after 100 miles or so the squealing comes back. Some recommend going higher speeds and slamming on brakes, but that does not work for me. From the bottom F30 post, it appears that some have done a "deburring of edges" or chamfer on the brake pads. I have not tried this yet, but am inclined to do so once the weather gets nicer.

PUMA measure for the fix (#52226124-01). The service report states as follows: "REMOVED BRAKE PADS FROM ALL FOUR WHEELS USE A FILE TO CAREFULLY DEBURR THE EDGES ALL AROUND THE BRAKE PAD ON THE BEARING SURFACE FOR THE BRAKE DISC. CLEANED BRAKE PADS LUBRICATED BRAKE PADS. REINSTALLED AND TEST DROVE.

https://www.bimmerfest.com/threads/m...-stop.1443054/

https://f30.bimmerpost.com/forums/sh....php?t=1228900

[STLBT]

Originally Posted by w1zk1d

This is a pretty common BMW issue with M Performance brakes and there are endless posts about this. I, too, have the same unresolved squeaking issue. I bought my 2020 M550i used and had the stealership change the brake pads, etc. but still have squealing. There are many many threads about this and many frustrated BMW owners, not just for G30 series. However, not all BMW owners experience this which is even more puzzling. The only way I can temporarily resolve this is by power washing my wheels/brakes, but after 100 miles or so the squealing comes back. Some recommend going higher speeds and slamming on brakes, but that does not work for me. From the bottom F30 post, it appears that some have done a "deburring of edges" on the brake pads. I have not tried this yet, but am inclined to do so once the weather gets nicer.

PUMA measure for the fix (#52226124-01). The service report states as follows: "REMOVED BRAKE PADS FROM ALL FOUR WHEELS USE A FILE TO CAREFULLY DEBURR THE EDGES ALL AROUND THE BRAKE PAD ON THE BEARING SURFACE FOR THE BRAKE DISC. CLEANED BRAKE PADS LUBRICATED BRAKE PADS. REINSTALLED AND TEST DROVE.

https://www.bimmerfest.com/threads/m...-stop.1443054/

https://f30.bimmerpost.com/forums/sh....php?t=1228900

Thank you! This is very good to know as I do have the M performance brakes. Was hoping it wasn't a bigger issue with my newly acquired CPO. Like I mentioned, the oem Audi pads did this as well because of the metallic construction. I eventually switched to ceramic on that car and the squeal went away.

[w1zk1d]

If it weren't for these issues that some G30s have- the squeaking brakes, rattling wastegate, flex disk/guibo, coolant leak- the G30 would be a super stellar car. It's still a stellar car and no car is without issues, but imo some of these should not be an issue in a luxury car.