[njnets21]

I know there are other threads about the M brakes and I've read them all very carefully in trying to decide between standard and M brakes but for me it comes down to just one thing, the squeaks.

Rather than continue an endless thread going in circles about looks, stopping power, cost, etc I'd like to just ask those that have the M sport brakes on their x40i if they really do squeak noticeably more than the standard would. Nothing else. Do they squeak and if so how annoying is it?

[Auricom]

Mine hasn't squeaked at all - MY20 40i with 10K miles.

[njnets21]

Originally Posted by Auricom

Mine hasn't squeaked at all - MY20 40i with 10K miles.

Appreciate the insight, thanks

[nZtiZia]

my 8-month old 45e M Sport 4K miles doesn't squeak. needless to say, my previous three Audi Q7s all squeaked…so embarrassing

[tscani]

21 about 9 month old 40i M Sport (M brake)18k miles no squeak at all since day 1 with 9 miles

[DG-X5]

Make sure you're looking at posts about the right M brakes.

The M Sport brakes I had on my G05 40i (4 piston) didn't used to squeak at all. Did 16k miles on it.

The M brakes on my F95 MC (6 piston) sound like a banshee most of the time at slow stops. 4k in so far here, but I don't see any signs of it letting up.

If the former (guessing based on the sub), you should be fine for the most part. Can depend on your usage patterns and driving habits a bit too - I've found things to be squeakier in dry/hot areas.

[Edubya]

Mine sound horrible, like a cheap car, mostly when coming out of park, sounds like the brakes are wet as opposed to a high pitched "squeak".

I get it, high performance brakes, especially two-piece (rotors) will make more noise - but the sound mine make, it's a little embarrassing for an $80k vehicle (that doesn't have two piece rotors).

[njnets21]

Originally Posted by DG-X5MC

Make sure you're looking at posts about the right M brakes.

The M Sport brakes I had on my G05 40i (4 piston) didn't used to squeak at all. Did 16k miles on it.

The M brakes on my F95 MC (6 piston) sound like a banshee most of the time at slow stops. 4k in so far here, but I don't see any signs of it letting up.

If the former (guessing based on the sub), you should be fine for the most part. Can depend on your usage patterns and driving habits a bit too - I've found things to be squeakier in dry/hot areas.

Good point. I was indeed referring to the M sport breaks and some of the things I saw about squeaking was likely the M performance version.

[-Vanguard-]

I have a real M and yes the brakes squeak at low speed braking. Only happens once they cake up the rotor. Doesn't happen when clean.

The M sport and real M F95/F96 brakes are not the same.

[BobsM3Coupe]

Originally Posted by -Vanguard-

I have a real M and yes the brakes squeak at low speed braking. Only happens once they cake up the rotor. Doesn't happen when clean.

The M sport and real M F95/F96 brakes are not the same.

It's funny, some people think that because they have the same color and the caliper looks similar, that it must be the same. They just think the drilled rotors are the only difference.

[-Vanguard-]

Originally Posted by BobsM3Coupe

It's funny, some people think that because they have the same color and the caliper looks similar, that it must be the same. They just think the drilled rotors are the only difference.

yea, its larger, drilled, 2-piece rotor, bigger calipers and different brake compound. Thats 5 differences right there.

The M sport brakes have none of these features, not even the M50i

[njnets21]

I made it very clear I was completely aware that m sport brakes are not remotely the same as m performance brakes.

[GREENPUS]

Originally Posted by njnets21

I made it very clear I was completely aware that m sport brakes are not remotely the same as m performance brakes.

No worries. Vanguard recently traded in his 40i and got a "real M" and he's making sure everyone knows it

[gqgambler]

The X5Ms are known for the squeal, not the X5s. I have an M50i with no squeal, had a F85 that squealed like a banshee until I switched over to ceramic pads.

[njnets21]

Originally Posted by GREENPUS

No worries. Vanguard recently traded in his 40i and got a "real M" and he's making sure everyone knows it

Lol fair enough

[atlas]

Well the M Sport brakes on my 40i squeal... The dealer chamfered them when I complained which reduced it somewhat but it's still there.

[Auricom]

Originally Posted by njnets21

I made it very clear I was completely aware that m sport brakes are not remotely the same as m performance brakes.

There's 2NH M Sport brakes and M Performance brakes and then brakes on F95/96 X5/6 ///M vehicles.

Keeping my reply contextual to X5/6 vehicles and not ///M.

The difference between X5/6 2NH and M Performance brake upgrade kit are discs:

2NH M Sport brakes -[Blue or Red] (Index C) - Fixed 4 piston Brembos front and larger discs, TRW rears and larger discs - Fixed 4 piston, 395x36 + 370x24 discs, lightweight ventilated

M Performance Kit (Red): Fixed 4 piston 395x36 + 398x28 discs, ventilated w/punched holes

X7 M50i come standard with equivalent M Performance brakes and ventilated discs but not punched holes

But yes F95/96 X5/6 ///M come standard with:
- Six-piston fixed front calipers and single-piston floating rear calipers at the rear
- Drilled and vented 395 mm front brake discs and 380 mm rear brake discs

https://g05.bimmerpost.com/forums/sh...38;postcount=3