[ResIpsaLoquitur]

I've got a question for any owners that went from a pre-LCI F90 to a LCI F90 that had compound brakes on their previous car and have them on their new one.

Were you one of the many owners on the 10 different threads on this subject that had the infamous brake squeal issues and then didn't have the issue on your new M5?

As I mentioned, I know there are numerous threads regarding brake squeal, but I didn't come across any comments on this specific situation.

I tried allllllll of the "solutions" other members have posted about. None of them worked for me. My SA completed two free "complete brake system" lubrications to appease me (which would have been ~$600 each). This caused its stop for about two weeks each time, and then it came right back. Which, in all fairness, is exactly what my SA said would happen. Still took him a bottle of tequila as thank you.

Please don't tell me "that's the way they are," "if you don't want brake squeal, don't get an M car," etc. I know all that. Have heard it a hundred times already. That's why I bought another one still.

Anyone had this problem and then noticed it was alleviated or didn't have it on their new car? I'm really hoping I won't have this on the new car. I know "they're supposed to be this way" and all that noise, but buying a six figure car and then sounding like a 30 year old school bus is really frustrating.

[sandwi54]

Replace with the porterfield brake pads and issue fixed. Only $500 spent!

[Aceswild19]

Originally Posted by sandwi54

Replace with the porterfield brake pads and issue fixed. Only $500 spent!

Mine should be here this week and hopefully installed next week. Really hope it does the trick!

[ResIpsaLoquitur]

Originally Posted by sandwi54

Replace with the porterfield brake pads and issue fixed. Only $500 spent!

Thanks for the tip! Did you go with the R4-S High Performance Street Brake? Do you also have a pre-LCI?

[ResIpsaLoquitur]

Originally Posted by Aceswild19

Mine should be here this week and hopefully installed next week. Really hope it does the trick!

I know how frustrating this is. I really hope they work for you! It's the one thing about this car that truly drives me nuts. Pre-LCI? And did you go with the R4-S?

[Aceswild19]

Originally Posted by AAM5

I know how frustrating this is. I really hope they work for you! It's the one thing about this car that truly drives me nuts. Pre-LCI? And did you go with the R4-S?

Pre-lci and I went with the Carbon Kevlar. That's the only ones currently on ACGs website. I think those are the r4s

[ResIpsaLoquitur]

Originally Posted by Aceswild19

Pre-lci and I went with the Carbon Kevlar. That's the only ones currently on ACGs website.

Thank you very much!

[sandwi54]

Originally Posted by AAM5

Thanks for the tip! Did you go with the R4-S High Performance Street Brake? Do you also have a pre-LCI?

Yes my wife's car is pre-LCI and I got the R4S. It completely eliminated the squeal.

[ResIpsaLoquitur]

Originally Posted by sandwi54

Yes my wife's car is pre-LCI and I got the R4S. It completely eliminated the squeal.

Retiring this car soon, but I hate the squeal so much, I'm going to replace the pads anyways. Hopefully won't be an issue on my incoming LCI M5C. Thanks again!

[snowbimmer]

Originally Posted by AAM5

Retiring this car soon, but I hate the squeal so much, I'm going to replace the pads anyways. Hopefully won't be an issue on my incoming LCI M5C. Thanks again!

Don't get your hopes up. My 2019 base started squealing at 5k. Then replaced the pads. A couple thousand miles of quiet turned into the school bus soon enough. My 2021 LCI Comp got noisy at 8k. Not nearly as bad. But, still annoying. CCBs next time for sure.

[ResIpsaLoquitur]

Originally Posted by snowbimmer

Don't get your hopes up. My 2019 base started squealing at 5k. Then replaced the pads. A couple thousand miles of quiet turned into the school bus soon enough. My 2021 LCI Comp got noisy at 8k. Not nearly as bad. But, still annoying. CCBs next time for sure.

Ugh. That's too bad. Thanks for helping me manage my expectations! I was hoping that perhaps this was resolved with compound brakes on the LCI, but with parts carryover, I can see why it wouldn't be.

When you replaced pads, did you replace with BMW OEM?

[snowbimmer]

Originally Posted by AAM5

Ugh. That's too bad. Thanks for helping me manage my expectations! I was hoping that perhaps this was resolved with compound brakes on the LCI, but with parts carryover, I can see why it wouldn't be.

When you replaced pads, did you replace with BMW OEM?

Yes. BMW did it under warranty. I never bothered with the LCI pads.

[ResIpsaLoquitur]

Originally Posted by snowbimmer

Yes. BMW did it under warranty. I never bothered with the LCI pads.

Thanks for the clarification and the insight. I'm due for an oil change next week. I'm going to try to get them to replace pads under warranty as well!

[micvite]

Originally Posted by AAM5

Thanks for the clarification and the insight. I'm due for an oil change next week. I'm going to try to get them to replace pads under warranty as well!

Your main issue is you don't drive the car hard enough, the squeeling is due to the pads glazing, you get rid of the issue by doing 3-4 stops from 100-20 in quick succession get some heat in those pads. Most if not all performance cars suffer from this. My old f10 never squeeked but that was because I regularly drove the car over 100 and mashed the brakes until abs almost kicked in every time I used them. If you drive the car like a commuter car your brakes are gonna squeel and that's that. If you don't believe try it next time, don't be gentle on the brakes really put your foot in it and I'll bet you they won't squeel after a few stops lol

[m5_mbb7]

CCBs are notoriously noisy too. My CCBs squealed on my previous LCI comp until about 11k miles when it stopped almost entirely. On my CS they squeal but I expect it to stop eventually like my LCI did. However I drive my car hard, it’s not exactly a commuter car to me

[Maverik259]

My ACG pads have been squeaking like crazy now since winter started. Yay me! Just gave her a thorough first wash of spring. Helped a bit, but the squeal is just "less" which i full expect to get worse now. Ugh.

Have about 10k miles on them.

[Holset]

Originally Posted by micvite

Your main issue is you don't drive the car hard enough, the squeeling is due to the pads glazing, you get rid of the issue by doing 3-4 stops from 100-20 in quick succession get some heat in those pads. Most if not all performance cars suffer from this. My old f10 never squeeked but that was because I regularly drove the car over 100 and mashed the brakes until abs almost kicked in every time I used them. If you drive the car like a commuter car your brakes are gonna squeel and that's that. If you don't believe try it next time, don't be gentle on the brakes really put your foot in it and I'll bet you they won't squeel after a few stops lol

This!

My standard compound brakes has been dead quiet and i drive my car in the winter to.

For the Carbon ceramics it's normal for them to make some noise when driven normally but they probably quiet down to if you do some hard braking.

[snowbimmer]

I've tried the panic stop braking many times, both cars. Still have squeaky brakes.

I realize CCBs can still make some noise - mainly want to be done with brake dust. Ay yi yi.

But, that's a whole 'nother thread.....again.

[Alberta]

Mine (CCB's) are dead quiet since beginning of ownership.

I couldn't stand the brake dust and the squeaky brakes on my previous F85 X5M.

[Ron1n]

Have M Perf Brakes on mine (2021), and they definitely squeak when warm when brake pressure is applied at low speeds.

[ResIpsaLoquitur]

Originally Posted by micvite

Your main issue is you don't drive the car hard enough, the squeeling is due to the pads glazing, you get rid of the issue by doing 3-4 stops from 100-20 in quick succession get some heat in those pads. Most if not all performance cars suffer from this. My old f10 never squeeked but that was because I regularly drove the car over 100 and mashed the brakes until abs almost kicked in every time I used them. If you drive the car like a commuter car your brakes are gonna squeel and that's that. If you don't believe try it next time, don't be gentle on the brakes really put your foot in it and I'll bet you they won't squeel after a few stops lol

The truth is that I regularly drive the car hard. I have been told (and tried) hundreds of times about the panic braking "solution." Admittedly, it does work temporarily; usually for the rest of my drive if it's a relatively short one. But as soon as I shut off the car (even if for a minute), and turn it back on, the squeal comes back. I smash the brakes, repeating the process, and then I am stuck in that continuous cycle. So frustrating.

[ResIpsaLoquitur]

Originally Posted by m5_mbb7

CCBs are notoriously noisy too. My CCBs squealed on my previous LCI comp until about 11k miles when it stopped almost entirely. On my CS they squeal but I expect it to stop eventually like my LCI did. However I drive my car hard, it’s not exactly a commuter car to me

I will probably go CCB on my next vehicle. While mine is a commuter, I do drive it hard while "commuting" lol. Did you squeal just stop on it's own when it stopped?