[RoccoVA]

Hi guys. I have a G87 6MT with about 850 miles on it so far. Im getting an intermittent brake squeal (sounds like a garbage truck) and I was wondering if anyone else was experiencing this? Ive owned several M cars and never had noisy brakes. My most recent F97 X3M's were silent. The G87 seems to do it with light to moderate braking around town and it comes and goes. Not sure if this was normal on the G87 or if I should mention it to my SA when I go in for the break-in service. Just curious to know if anyone else was experiencing this? Maybe BMW put a more aggressive pad on the M2?

[JustinHEMI]

This is normal based on my experience with F87, and my Challengers before, with Brembo based systems. I know people don't like it, but it's a natural part of high performance brakes with those pad compounds. They're noisy and dusty, but they work very well. There are aftermarket solutions to both dust and noise, often at a cost of performance. Isweep offers pads which they claim match OEM performance with less noise and dust.

[RoccoVA]

Originally Posted by JustinHEMI

This is normal based on my experience with F87, and my Challengers before, with Brembo based systems. I know people don't like it, but it's a natural part of high performance brakes with those pad compounds. They're noisy and dusty, but they're work very well. There are aftermarket solutions to both dust and noise, often at a cost of performance. Isweep offers pads which they claim match OEM performance with less noise and dust.

My LC500 was this way as well, but Lexus offered a pad replacement for customers who wanted quiet brakes. My X3M was always quiet, but I thought maybe they had put a more aggressive pad on the M2. Thanks for the insight.

[JustinHEMI]

Originally Posted by RoccoVA

My LC500 was this way as well, but Lexus offered a pad replacement for customers who wanted quiet brakes. My X3M was always quiet, but I thought maybe they had put a more aggressive pad on the M2. Thanks for the insight.

You can certainly see what they say at service. They may say it's normal, or they may replace the pads for you. If they do that, I suspect they'll make noise again in short order.

I'm skeptical of isweeps claim of same or better than OEM performance with little to no dust, so I'm still weighing my options. I may just live with the OEM at least for the rest of this year before making a decision. Hoping to see more reviews from G80/82 owners come in on the isweeps.

[BadAtUserNames]

My brakes are behaving exactly like OP describes. Pretty much the same mileage too. Maybe they will mellow out after a few thousand miles? I guess I just assumed this was a symptom of high performance brakes.

[zero21]

Originally Posted by BadAtUserNames

My brakes are behaving exactly like OP describes. Pretty much the same mileage too. Maybe they will mellow out after a few thousand miles? I guess I just assumed this was a symptom of high performance brakes.

They don't. In the owners manual, BMW does not recommend short trips, and recommends bedding in the brakes properly with massive 70-0 stops repetitively. I didn't do this in the 470mi I owned my car, and I'm certain it won't stop the noise or dust. It's part of the "ownership experience". One of the reasons I sold the car, everyone in traffic staring at you. maybe if I was in a Diablo or a Viper or some crazy car I could justify it, but not an M2.

[GenXG87]

Squeak squeak. Maybe I’m getting old but don’t feel like squeaky brakes is a badge of honor that you have good stoppers.

I don’t care about dust and will likely run different pads when I go to the track I was thinking of doing some hard brake runs to see if it deals with the noise.

[M2siast]

Have you guys tried doing some hard braking to settle them?

[BadAtUserNames]

[QUOTE=MoMorg;30157974]Squeak squeak. Maybe I’m getting old but don’t feel like squeaky brakes is a badge of honor that you have good stoppers.

I don’t care about dust and will likely run different pads when I go to the track I was thinking of doing some hard brake runs to see if it deals with the noise.[/QUOTE]

Just to be clear, I don’t like the squeaking. It’s annoying. For me though it’s not something I’m worried about long term because when my rose colored glasses finally fall off, and that new car smell is a little less intoxicating, I can start to fix the little annoyances. Wheel gap being one of them, and maybe different pads for the squeaks if a proper bedding procedure doesn’t work.

[RockCrusher]

Originally Posted by zero21

They don't. In the owners manual, BMW does not recommend short trips, and recommends bedding in the brakes properly with massive 70-0 stops repetitively. I didn't do this in the 470mi I owned my car, and I'm certain it won't stop the noise or dust. It's part of the "ownership experience". One of the reasons I sold the car, everyone in traffic staring at you. maybe if I was in a Diablo or a Viper or some crazy car I could justify it, but not an M2.

All I can find in the digital M2 owners manual regarding brake break in...

Brake system
For M Compound brake:
M Compound brake disks and brake pads must be run in to avoid possible brake noise. Drive cautiously for the first ap- prox. 300 miles/500 km.

One should *never* hard brake new brakes and bring the car to a stop.

[RockCrusher]

Originally Posted by RoccoVA

Hi guys. I have a G87 6MT with about 850 miles on it so far. Im getting an intermittent brake squeal (sounds like a garbage truck) and I was wondering if anyone else was experiencing this? Ive owned several M cars and never had noisy brakes. My most recent F97 X3M's were silent. The G87 seems to do it with light to moderate braking around town and it comes and goes. Not sure if this was normal on the G87 or if I should mention it to my SA when I go in for the break-in service. Just curious to know if anyone else was experiencing this? Maybe BMW put a more aggressive pad on the M2?

There is always a chance of a possible hardware problem and the only way to know for sure this is or is not the case is have the brakes checked out. At the break in service is a good time unless the behavior is serious enough to believe it needs to be investigated sooner rather than later.

But with a number of vehicles with large disc brakes (Porsche Turbo, 2 Scat Packs, and one Hellcat) and some not so large (MINI JCWs, M-B cargo van) a bit of squeal arises from brake dust accumulation on the brake piston dust boots.

This accumulation interferes with the natural tendency of the pistons to retract slightly when the brake pedal is released. (This retraction is from the piston seal hysteresis.)

If the pads don't retract they will drag on the rotor and over time will develop a light glaze the results in the squeaking/squealing noise.

When I start to hear squealing during light braking or sharp turns at low speed in a parking lot I take the vehicle to a DIY car wash and treat the brakes/wheels to a brake wash/rinse. This removes not only the dust accumulation on the wheels but also on the brake hardware.

If one starts out with the wash wand setting set to rinse the initial bit of water sprayed on the wheel/brake will run tinged with black from the brake dust. The dust build up is considerable.

No need to jam the wash nozzle into the pad area and risk damaging the dust boots. Just keep the wand at a reasonable distance and washing with the wand setting first at soap, then rinse, then no spot rinse.

When done be sure to drive the car and use the brakes enough to get them hot to thoroughly dry the brake hardware and this includes the buried in the rear hubs parking/emergency brake hardware. You can't or shouldn't try to apply the parking brakes while moving so you just have to rely on the heat from using the regular brakes being sufficient to dry the parking brake hardware.

What I often do -- especially if the brakes were making a bit of noise before -- is to arrange to do 3 moderately hard slowdowns from (legal) high speed from say 70mph to 45mph -- in rapid succession. This heats up the hardware and removes the pad/rotor glaze.

So far every time afterwards the brakes are quiet.

This worked for my Porsche cars (starting with my first Porsche in 2002), my Dodge Challenger Scat Packs, my Hellcat, both JCWs, MINI S, a M-B cargo van, a BMW 230i. So far my M2 at around 1600 miles has not manifested any brake noise but I have washed the car several times at the local DIY car wash -- to remove bugs (no brush scrubbing the blast of water removes the bugs) -- and at the same time I wash the wheels/brakes as described above.

So I have been ahead of the dust problem with the M2 and the brakes have remained quiet.

[Game]

Less than 150 miles here and getting the squeak here and there. Doesn’t really bother me.

[M-2'ned]

Glad I'm not the only one. I think it's embarassing to drive a $75k car with squeeky brakes. 1600 mi and they've squeeked since day 1.

[Ravenseal]

For what it’s worth, I found an abandoned back road and did a bed-in procedure for the brakes on my M240i. Probably not exactly the same pad compound as the M2, but they’re dead silent after 5,000 miles. I’ll repeat this experiment with the M2 at some point and report back.

[M_Power Rob]

Originally Posted by Ravenseal

For what it’s worth, I found an abandoned back road and did a bed-in procedure for the brakes on my M240i. Probably not exactly the same pad compound as the M2, but they’re dead silent after 5,000 miles. I’ll repeat this experiment with the M2 at some point and report back.

I have a 23 M240...no brake squeal whatsoever since day 1 to now (over 7,000 miles).

[cmgbk75]

How do you do a poll? I’m curious about Brake squeal prevalence. I keep reading about it and I haven’t experienced any and it makes me wonder if break-in techniques has anything to do with it or is it something that’s right around the corner anyway.

If my rather aggressive break-in regimen could help soon-to-be owners, I’m happy to pass it on.

[M2siast]

Originally Posted by cmgbk75

How do you do a poll? I’m curious about Brake squeal prevalence. I keep reading about it and I haven’t experienced any and it makes me wonder if break-in techniques has anything to do with it or is it something that’s right around the corner anyway.

If my rather aggressive break-in regimen could help soon-to-be owners, I’m happy to pass it on.

I found you have to use the browser and be on desktop mode (unless on an actual laptop/desktop).

Click create a thread and at the very bottom of the page there’s a checkbox to say “create a poll”. Once you hit create, if you have the checkbox checked, it’ll take you to the page where you define the poll question and answers.

[rons e92]

FWIW, after driving my M2 for about 10 minutes the brakes start squeaking like crazy. If I brake like a chick texting coming up to a red light who isn't paying attention, it's quiet, but if I brake early to slow safely, it's insanely loud.

I'm going to try to bed these things.

[ronin13013]

I'm at 2000 miles. It happens less.

[Squidget]

1400 miles, not a peep from my brakes since day 1. I'm one of the lucky ones I guess.

[masd79]

Bedding doesn’t help either, it comes back. I am on my third g8x car from g80, 83 and now 87. All squeal like a dump truck. The only way to avoid a sequel is to brake hard on low speeds which feels odd and unecessary but it is what it is… only bmw m brakes squeal, Porsches, amg only squeal under certain conditions not consistently all the time. I see this as a m engineering flaw!

[Chicanery]

somewhat related.... does anyone else get a slight vibration/shaking of brakes when coming to a complete stop? wondering if its a build-up of brake dust or if the rotor is compromised.. which would be odd since it's only got 2300 miles on it....