Cracked Ceramic Break Rotor **HELP NEEDED**

KBM5 · 05-17-2020, 01:50 AM

Hello Guys,

So today I was about to go on a drive with my 2018 F90 M5 and a noticed something unusual on my driver side Ceramic Break Rotor. I had a closer look and it looked like a piece of my rotor just fell off and left a hole (look at the pictures attached).

My car has 23,000 Kms on it, I maintain extremely well, I'm extremely cautious with it. The car has been tracked once in its life about a year and a half ago, I also often go for spirited drives, and the car is winter driven as well in Montreal QC, where it gets VERY cold. When I do use my breaks hard, I do give them a cool off period of at least 3-5 minutes of slow driving to air off the heat from the disks before completely stopping, and make sure I do not over heat my rotors. I use the car how it is meant to be used, mostly on highways for speed runs and or twisty roads a times, but again never abusing my breaks. Again I'm very cautious.

Therefore I have the following questions:

I was wondering what could've caused such an issue?

Is this something that can be covered under the warranty?

Can I still drive the car in the mean time? How safe is it?

Thank you guys for any help or insight you have on this issue!

shawnhayes · 05-23-2020, 06:14 PM

Coating fell off.

Should be covered under warranty.

Looks like the pad stuck to the rotor while parked (see circular discoloration near the chip?)

Safe to drive, but not "hard". Won't be safe long. The rest of the rotor is at risk.

Question, is this a rear rotor? If so, probably from parking brake use while wet, if I had to guess.

Shawn

racingbrake · 06-05-2020, 01:27 PM

Any update on your claim for warranty?

KBM5 · 06-09-2020, 11:36 PM

Quote:

Originally Posted by racingbrake

Any update on your claim for warranty?

Warranty approved it! Waiting for the disk coming from germany!

gtenedio · 06-10-2020, 09:08 PM

make sure they're replacing the pads too.

Anders R · 11-23-2020, 06:37 AM

This was exactly my worry on my Giulia Quadrifoglio with carbon ceramic brakes (changing wheels was always nerve wrecking!), and the reason why I specifically went for steel brakes on the F90. Great news that the warranty is covering it!

05-17-2020, 01:50 AM	#1
KBM5 New Member 23 Rep 25 Posts Drives: 2018 F90 M5 Join Date: Nov 2019 Location: Montreal, QC iTrader: (0)	Cracked Ceramic Break Rotor HELP NEEDED Hello Guys, So today I was about to go on a drive with my 2018 F90 M5 and a noticed something unusual on my driver side Ceramic Break Rotor. I had a closer look and it looked like a piece of my rotor just fell off and left a hole (look at the pictures attached). My car has 23,000 Kms on it, I maintain extremely well, I'm extremely cautious with it. The car has been tracked once in its life about a year and a half ago, I also often go for spirited drives, and the car is winter driven as well in Montreal QC, where it gets VERY cold. When I do use my breaks hard, I do give them a cool off period of at least 3-5 minutes of slow driving to air off the heat from the disks before completely stopping, and make sure I do not over heat my rotors. I use the car how it is meant to be used, mostly on highways for speed runs and or twisty roads a times, but again never abusing my breaks. Again I'm very cautious. Therefore I have the following questions: I was wondering what could've caused such an issue? Is this something that can be covered under the warranty? Can I still drive the car in the mean time? How safe is it? Thank you guys for any help or insight you have on this issue! Attached Images
	Appreciate 0 Tweet Quote

05-23-2020, 06:14 PM	#2
shawnhayes Major 1830 Rep 1,315 Posts Drives: 22M5 CS,23X5E,24M3 CS,24 i4 Join Date: Aug 2015 Location: Virginia iTrader: (0)	Coating fell off. Should be covered under warranty. Looks like the pad stuck to the rotor while parked (see circular discoloration near the chip?) Safe to drive, but not "hard". Won't be safe long. The rest of the rotor is at risk. Question, is this a rear rotor? If so, probably from parking brake use while wet, if I had to guess. Shawn
	Appreciate 0 Quote

06-05-2020, 01:27 PM	#3
racingbrake Private First Class 32 Rep 124 Posts Drives: M3 Join Date: Sep 2015 Location: Fullerton, CA iTrader: (0)	Any update on your claim for warranty?
	Appreciate 0 Quote

06-10-2020, 09:08 PM	#5
gtenedio Major 348 Rep 1,237 Posts Drives: '%E2%80%9909 e92 m3, '19 X3, % Join Date: Apr 2011 Location: nyc iTrader: (1)	make sure they're replacing the pads too. __________________ .
	Appreciate 0 Quote

11-23-2020, 06:37 AM	#6
Anders R Private First Class 53 Rep 102 Posts Drives: 2023 BMW M3 Touring Join Date: Jul 2014 Location: Brussels, Belgium iTrader: (0)	This was exactly my worry on my Giulia Quadrifoglio with carbon ceramic brakes (changing wheels was always nerve wrecking!), and the reason why I specifically went for steel brakes on the F90. Great news that the warranty is covering it!
	Appreciate 0 Quote