[HMN]

I've had this nuisance of a sound from the second month.. and it's gotten even worse nowadays. Doesn't seem that there is a long term solution as of now

[xmanpro]

There’s many posts talking about the isweep brakes and their effectiveness.

[Alan l.]

EBC Reds as well. I tried both on my X5M.

isweep is2000 is completely silent all the time and i'd say 50% less dust than oem pads

EBC Reds would occasionally make a squeal for a split second time to time but you only hear it if you have your windows open and you are looking for it. Non issue imo. I think these dust slightly less than isweep is2000 and maybe more in line with is1500. Brake feel is very similar in both pads.

[xmanpro]

I’m running the is2000 and like the bite compared to the oem. It still has minimal dust but I can live with it. Those oem pads were rough! These were after less than 200 miles and taken at my installer right before the iSweeps went in.

[blake6551]

I have 25k miles on my '23. Only had this issue once or twice for a few days, but I try to get some hard braking in often and I do run it through a tunnel wash once a week.

OEM pads, so not sure why it hasn't come back but might be worth trying!

[fallen]

Originally Posted by marillo

there was a video Porsche released and it explains why the real sport cars squeak - it has to do with vibration frequency with large break callipers - im sure the cheap pads have something to do with it as well but they state it is a normal and expected thing. Not sure if anyone knows about the video im talking about it was posted in this forum a bit ago.

As for isweep 2000 - will BMW install these for me if I buy them? My 2024 x5m if ur curious is 2mo old and has been squealing since the first month. Not very painfully loud yet like my 2022 m50 did but its there.

Yes, I watched the Porsche video, and it makes sense - thank you!
Brakes will make a bit of noise when the surfaces are not perfectly aligned, but it should be a rare occasion, not an every day/every minute experience
For what it's worth, I own a Porsche 718 Cayman GTS 4.0, and the brakes are silent whether I am on the street or on a track.

[ajob]

What about looking at this "brake squealing" from a different perspective?

Our big M brakes are extraordinary engines, by far the most powerful on board: on demand, they may instantaneously deliver a very high torque at each wheel - they are incredibly compact engines, considering that they are rated up to 1500 hp for a few seconds.

Of all the design compromises that such an high power engine may require, the one of ensuring that each of the front three piston pairs will have exactly the same pressure on the pads when the brakes are just "caressed" - that's when they squeal - is a low priority one: it means that one of the pads may just be barely touching the rotor and may so start a mechanical vibration similar to when you caress the rim of a crystal glass cup with a wet finger... both the cup and the rotor will start singing like a diapason.

A while ago my wife started complaining that her 435xd Grand Coupe would start squealing when braking lightly.

I told her to play with it and try to brake so as to increase the squealing. For a while she actually had fun at it, then got bored and forgot, problem solved.

Let your 1500 hp monsters sing their tunes from time to time... I'd say they even earned it!

[AutoFFF]

Originally Posted by Alan l.

This will only get worse over time. All M cars do it especially the heavier ones. Do youself a favor and get some isweep 2000 or EBC Red brake pads. Way less dust and completely silent. I'm kicking myself for not doing it sooner and dealing with my car sounding like a old bus for 3 years.

the hard stops or washing the wheels/brakes only lasts for a short period of time before it comes back. The dirtier the wheels/rotors the worse it gets.

It makes sense. The sound was coming out intermittently. We sent the car in today, but there wasn't a sound at all. lol

[AutoFFF]

Originally Posted by boi222

It came back , so that didn’t last very long …

That sucks! We did a quick wash last night, and the sound was gone today. Though the squeaky sound doesn't appear all the time.

[AutoFFF]

Originally Posted by R-M4

I had an M4 before and that was NOT an issue.

The dealer said it happens to all M cars. what a liar!

[AutoFFF]

Originally Posted by boi222

Yea , I had a e92 m3, f82 m4, f80 m3 and f97 x3m , none of them had this problem. Surprisingly the only bmw that had was the e92 335 which wasn’t a M

This provides further proof that the dealer lied to us today by claiming all M cars have this issue!

However, if it's a known issue, BMW should consider changing the brake supplier.

[AutoFFF]

Originally Posted by marillo

My 2024 x5m if ur curious is 2mo old and has been squeeing since the first month. Not very painfully loud yet like my 2022 m50 did but its there.

Has it been happening every time you drive since then? For us, it's not happening all the time. We didn't hear a sound at all today.

[AutoFFF]

Originally Posted by HMN

I've had this nuisance of a sound from the second month.. and it's gotten even worse nowadays. Doesn't seem that there is a long term solution as of now

Washing the wheels doesn't help? We did a quick wash last night, and not a sound was heard today. Not sure how long it will last, but sometimes when it happens, it just lasts for a few days and then it's gone.

Our car has the same color as yours. Cheers!

[AutoFFF]

Originally Posted by ajob

What about looking at this "brake squealing" from a different perspective?

Our big M brakes are extraordinary engines, by far the most powerful on board: on demand, they may instantaneously deliver a very high torque at each wheel - they are incredibly compact engines, considering that they are rated up to 1500 hp for a few seconds.

Of all the design compromises that such an high power engine may require, the one of ensuring that each of the front three piston pairs will have exactly the same pressure on the pads when the brakes are just "caressed" - that's when they squeal - is a low priority one: it means that one of the pads may just be barely touching the rotor and may so start a mechanical vibration similar to when you caress the rim of a crystal glass cup with a wet finger... both the cup and the rotor will start singing like a diapason.

A while ago my wife started complaining that her 435xd Grand Coupe would start squealing when braking lightly.

I told her to play with it and try to brake so as to increase the squealing. For a while she actually had fun at it, then got bored and forgot, problem solved.

Let your 1500 hp monsters sing their tunes from time to time... I'd say they even earned it!

Interesting point. The sound is not unbearable nowadays, and it comes and goes. We'll just leave the brakes as they are for now. Thanks for sharing.

[AutoFFF]

Originally Posted by fallen

Squicking or otherwise noisy breaks is anything but normal.
BMW is using an inferior compound for the OEM pads, which creates excessive dust, which causes the noise.

Whoever is trying to convince you that the noise is normal is either lying or doesn't know what they are talking about.

I swapped my pads for iSweep and the noise issue was solved and never came back.
r33_RGSport sells the proper pads and am sure will be happy to help.

Thanks for the tip. We're trying to avoid the hassle of replacing car parts. Luckily, the sound comes and goes. If it gets worse down the road, we can think about replacing them.

[boi222]

Originally Posted by AutoFFF

This provides further proof that the dealer lied to us today by claiming all M cars have this issue!

However, if it's a known issue, BMW should consider changing the brake supplier.

I think the Porsche video posted above helped explain it, the sounds does come and go and it seems to align with what they were saying, since I did notice when it was wet from rain, it would do it a lot more often

[HMN]

Originally Posted by AutoFFF

Washing the wheels doesn't help? We did a quick wash last night, and not a sound was heard today. Not sure how long it will last, but sometimes when it happens, it just lasts for a few days and then it's gone.

Our car has the same color as yours. Cheers!

Great color right?
I took it to the dealer and asked them to check it - the car already has a brake recall so i'm hoping they clean it while doing the necessary service.

[fallen]

Originally Posted by AutoFFF

Thanks for the tip. We're trying to avoid the hassle of replacing car parts. Luckily, the sound comes and goes. If it gets worse down the road, we can think about replacing them.

Brake pads are not car parts per se; they are consumables, the same as oil, gas, brake fluid, etc.
The replacement process is very easy for DIY and takes about 30 min for a qualified shop to do.

Some people find the sound tolerable; I personally, being a mechanical engineer with OCD, could not tolerate it