2014 CCB

[Speenybean]

Looking at purchasing a really clean really low mileage F10 m5 with CCB package. Car has 30k miles and the I drive states 4,100 miles for front pads and 15,000 for rear pads. Visually the carbon rotors look great and the car has never been tracked. I'm under the assumption these brakes will
Last a lot longer and maybe the service mileage is low due to the vehicle being 5+ years old?? Any help would be greatly appreciated. Thanks!!!

[schrickm5]

I think the only way to be sure about the Ceramic discs is for them to be weighed. The pads arent too cheap either I think.

[SCD-1983]

Originally Posted by SCD-1983

The appropriate method to estimate the wear of CCB is to weigh the rotor with a high precision scale. Since they are mounted, you can only check the wear indicators, they are located in 3 positions on each side of the rotor, 6 total. They need to be smooth and not uneven, there are a few documents available to properly assess a CCB system. And the pads are not cheap, that's true. Looking at the overall mileage, it's possible the pads have to be replaced. The F10 M5 is a very heavy car and hard braking can wear out the pads within 45000 miles or less, the rotors last much longer. Even spirited street driving will wear out these ceramic pads 😳

https://f80.bimmerpost.com/forums/sh...?#38;t=1115439

[SCD-1983]

Assessing MCCB

[Aajav-Khan]

Originally Posted by SCD-1983

Assessing MCCB

If you take the car to the dealership, they can tell you the true remaining life on the ccbs. In general the cars computer is calculating useful life based on in service date and not true usage.

[M5Rick]

There is an impregnated mark on each CC disc showing you the state of it, if it's showing proud then your fine, if nearly faded then they're reaching their end of their service life.
The pad thickness is easy to see from the car of how much they are worn.

[Flying Ace]

Originally Posted by Aajav-Khan

If you take the car to the dealership, they can tell you the true remaining life on the ccbs. In general the cars computer is calculating useful life based on in service date and not true usage.

The computer (CBS) is estimating the wear based on pad sensor. As others have said, you have to get the rotors weighed, but at a minimum look at the circle wear indicators on the rotors..

IMO, at 4100 and I would steer clear of the car, unless you're cool with dropping $7k on new rotors in the next 12 months. I would also question why a car with 30k miles only has 4100 left on the front CCBs AND supposedly have not been tracked. It's a clear indication the car has been tracked or the braking system has been used very hard.

FWIW, I recalling looking at a 30k M6GC with CCBs and computer said there were at least 18k miles left IIRC, which at the time I thought was a bit higher than average wear for a street car. I want to say for our cars, CCB wear for street use probably should last around 60k-70k.

[texsn95]

From researching CCBs, the consensus (that I found at least) is that the rotors should last close to 100k miles with just normal street driving, with the pads at ~50k. I'm super easy on my brakes and by the amount of miles I usually put on a vehicle, I'll be an old man (43 now) before I'd have to swap them out.