I think I already made a thread about this, but I'm hoping someone can help again. :) Lately, my car has been squealing as I'm picking up speed, but once it has reached 40mph, the noise is gone. AND now, when I make slight left turns it squeals and no it's my tires. I'm a little annoyed with my car now :( and the dealership can't help me.

I think I already made a thread about this, but I'm hoping someone can help again. :) Lately, my car has been squealing as I'm picking up speed, but once it has reached 40mph, the noise is gone. AND now, when I make slight left turns it squeals and no it's my tires. I'm a little annoyed with my car now :( and the dealership can't help me.

mods?

nope no mods. everything is stock.

ANy clue where the squealing is coming from? Which side? Front or rear? etc etc. One thing that comes to mind is one of the belts may be making the noise. And if you can reproduce it consistently, why is the dealership not helping?

I would say my right rear. Well, I took it to the dealership and they couldn't reproduce the noise so they gave me my car back. They took it for a drive or a couple of miles or so. Dealership said since they couldn't reproduce the sound, just handed my car back to me. I wonder what it could be, I took it to a mechanic and he took my car for a spin and still no noise. Could it be the sensor rubbing against my brakes, if that was the case couldn't they adjust the sensors?

I am actually in the same boat. There are many posts on the subject, but to save time, I'll summarize. The squealing is brake noise. After you stop, and accelerate away, the brakes squeak. It also happens when you turn. This appears to be related to a build up of brake dust on the rotors and pads and may or may not impact the brake wear sensor. I believe that they can clean this out and make the sound go away for a while. I just had a service completed during which they attempted to remedy the problem. They failed and the dealer is a little inconvenient, so I think I'll live with it for a while. My SA told me that even if they did fix it, he believed it would come back sooner or later. The reason they could not reproduce it is that you generally have to heat the brakes up before you hear it. Also, even though you tell them that this happens upon acceleration. The moment you mention brakes, they think you mean during stopping which is not when it makes the sound. If you'd like, read the other posts related to break squeaking and I think you may find even more info.

I am actually in the same boat. There are many posts on the subject, but to save time, I'll summarize. The squealing is brake noise. After you stop, and accelerate away, the brakes squeak. It also happens when you turn. This appears to be related to a build up of brake dust on the rotors and pads and may or may not impact the brake wear sensor. I believe that they can clean this out and make the sound go away for a while. I just had a service completed during which they attempted to remedy the problem. They failed and the dealer is a little inconvenient, so I think I'll live with it for a while. My SA told me that even if they did fix it, he believed it would come back sooner or later. The reason they could not reproduce it is that you generally have to heat the brakes up before you hear it. Also, even though you tell them that this happens upon acceleration. The moment you mention brakes, they think you mean during stopping which is not when it makes the sound. If you'd like, read the other posts related to break squeaking and I think you may find even more info.

There is even a video demonstrating the squealing on youtube.
http://video.google.com/videosearch?q=squealing%20brakes%20bmw&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7HPND&um=1&sa=N&tab=wv#

I have also experienced epic brake squealing, but mine occurs on light application of the brakes at low to moderate speeds.

Some suggested actions you can ask your SA about:

Trimming the brake sensors (one per axle); A software update, some people attribute the squealing to the brake drying and drive off assistant programming on early versions; you can have your brake pads chamfered; you can have the mounting side of your brake pads lubricated where they meet the calipers.

When all of this doesn't work, you can drive your BMW ice cream truck around until it needs new pads, at which time BMW will replace your pads and rotors on your maintenance schedule's service interval, which is designed by accoutants to make BMW rich, not ake your car run at peak condition.

Just had my 07 335xi in the shop Friday for this exact problem. Apparently it had something to do with the parking brake "hanging up" on something. They adjusted that, removed brake components and lubed as necessary, then put it back together. No more squeaking. Same day--in and out. Hope this helps.

Looks like this is a common issue. I've been having this issue as well. The dealer cleaned and lubed the parking brakes the first time around. The issue went away for about a week and now it's back. Sigh.

Very common issue -- BMW NA is about as clueless as the dealers. Use this forum (and maybe some of its competitors) to back up you argument when your SA says, "this is normal" or "what squealing?"

I just sent my SA an e-mail with a few links the last time I needed service..the links pointed to hundreds of threads about squealing brakes. He was like, "Holy Squealing batman.

I have this problem too and it only happens to me when I am in stop and go traffic. After a while of that it starts squealing at low speeds and when I turn left. Just to test it I yanked the wheel left and squeal is there. Like I said only happens when I am in stop and go traffic more than 30min. Other than that I am fine.

If you hear anything let us know and if I can get it resolved I will post it up. I'm leaning more towards the braking system though

The problem, from what I can ascertain, is thus:

Brake systems function on the principle of friction -- very simply, the rotors are bitten by the pads, and the cars slows down.

The high friction material of the brake pads (famous for all that BMW dust) tends to work really well for stopping, but not so well for maintenance. THe pad material begins to get everywhere, including all over the rotor, which in stop and go traffic is hot enough to collect material, but not burn it off (as opposed to high speed driving where there is enough friction from brake application and enough heat to remove it).

Now the surface of your brake rotor is dirty, and there is also superheated brake dust everywhere, that cools, and collects on everything. The pad gets uneven, and so does the surface of the rotor. The rotors may even become grooved from this lack of smoothness.

BMW has exacerbated the problem with strange maintenance practices, that seem to be designed to save BMW NA money, rather than fix the problem.

Things to do check to ensure quiet brakes (aside from proper installation and the use of OEM or better components):

1. Use a good bedding procedure ...like the one at Zeckhausen.com
2. Lubricate the mounting (caliper side) contact points of the pad with BMW recommended lubricant or better.
3. Regularly clean your brake wells..use compressed air.


Don't be afraid to re bed your brakes. While I wait for my maintenance interval for the original pads and rotors to expire, the rebedding of my apds has helped alleviate the brake squealing tremendously.


The brake pad squealing phenomenon includes but is not limited to:

1 . Squealing at low speeds during acceleration
2. Squealing on mild applciation of brakes at low speeds

There are many threads on this and other forums about the problem, and there is all sorts of advice out there. I think we need a comprehensive guide to this issue, and I will begin work on it this afternoon...Stay tuned...but right now, I have to go and visit the 2nd floor. Bathroom.

I have the same problem, starts at 10 mph and goes away when I reach 30 mph. very annoying. Dealership doesn't help

I went in and dealt with this. I got the "we don't hear it BS" and went above the SA.

What they claim to have done to my car is grind some "rear sensor" on the car. I would have bet my life that it was from the front of the car, but after they did that...I don't get that annoying squeal.

So don't take it...call the customer service person at the dealership and complain. I even was supposed to take somebody for a ride and of course "they were too busy" and the head of customer care (the ones that ask you to give them all 5's told them to make sure it's fixed.

Just had my 07 335xi in the shop Friday for this exact problem. Apparently it had something to do with the parking brake "hanging up" on something. They adjusted that, removed brake components and lubed as necessary, then put it back together. No more squeaking. Same day--in and out. Hope this helps.

I took my car in for the same problem (passenger side) and they are replacing some part for the parking brake. I get the car back today as they had to keep it as they didn't have the part in stock.

I will post the diagnosis and part once I get it back.

I use the parking brake all the time (a habit I got into as early GM cars with 4 wheel disk brakes you needed to use the parking brake to adjust the rear brakes, found this out after having to replace warped front rotors at 12k), do you think this constant use attributed to the problem?

I took my car in for the same problem (passenger side) and they are replacing some part for the parking brake. I get the car back today as they had to keep it as they didn't have the part in stock.

I will post the diagnosis and part once I get it back.

I use the parking brake all the time (a habit I got into as early GM cars with 4 wheel disk brakes you needed to use the parking brake to adjust the rear brakes, found this out after having to replace warped front rotors at 12k), do you think this constant use attributed to the problem?
What do you mean use it all the time? As in while driving? or just when parked? If the latter, then that is what it is meant to be used for and everyone should be using it while parked, no issues there. Otherwise, yeah it may be a problem using the parking brakes repeatedly while not at a standstill.

What do you mean use it all the time? As in while driving? or just when parked? If the latter, then that is what it is meant to be used for and everyone should be using it while parked, no issues there. Otherwise, yeah it may be a problem using the parking brakes repeatedly while not at a standstill.

Yes when parked.
:lol

Yes when parked.
:lol
Hey had to check, I have other uses for it, but that is mainly in the winter on the snow :devillook. Older cars I had (FWD mainly) it used to get a lot more workout :nono, something has to even out the wear on the rear tires of an FWD car :embarrasm.

This may sound stupid, but I spent most of the weekend in stop and go traffic with the windows down. I noticed something unusual. The brakes only seemed to squeal under acceleration. If I put the clutch in an coasted, the squealing stopped. I wonder if the traction control is somehow involved? The noise in my car seems to be coming from the rear brakes, so it could be that as I was accelerating, the weight of the car shifted towards the back and this caused the brake noise. Taking it back to the dealer is a pain, but I may have to do it. I just wish I new what the problem was exactly so I could tell them what it was and have them fix it.

I had the same acceleration squeal a few months back. Dealer replaced all of my brakes and it hasn't come back since. He actually said it was a sensor hanging but whatever.

I gave the fix above. You HAVE to complain more than once to get it fix and it's the rear sensor. Don't ask me what they grind...but it fixes it!

I got my car back yesterday and here is what they wrote up:

Parking brake shoes noisy. Verified noise, determined parking brake shoe making noise. Tried to burnish parking brakes, but noise got louder. Replaced parking brake shoes, cleaned and lubed rear brakes. Noises gone, ok.

Parts:

Parking Brake Shoes
Repair Kit Brake Shoe
So hopefully it's fixed. Fingers are crossed.

Hey had to check, I have other uses for it, but that is mainly in the winter on the snow :devillook. Older cars I had (FWD mainly) it used to get a lot more workout :nono, something has to even out the wear on the rear tires of an FWD car :embarrasm.

Might start to use once I have taken my tactical driving class in how-to elude terrorist's and they teach me the fast 180° technique using the parking brake. :D



So do you think using the parking brake all the time when parking contributed to my problem?

I got my car back yesterday and here is what they wrote up:

Parking brake shoes noisy. Verified noise, determined parking brake shoe making noise. Tried to burnish parking brakes, but noise got louder. Replaced parking brake shoes, cleaned and lubed rear brakes. Noises gone, ok.

Parts:

Parking Brake Shoes
Repair Kit Brake Shoe

So hopefully it's fixed. Fingers are crossed.

The tried that with mine, except they didn't replace the parking brake shoes. Maybe that will be the fix for mine then.

The tried that with mine, except they didn't replace the parking brake shoes. Maybe that will be the fix for mine then.

Good luck.

Ya'all have me totally paranoid...I have been turning my radio down, windows open and craning my neck to make sure my car is still quiet. Good news so far.

Just random babbling...glad some of you are getting this fixed with relative ease.

Well, its not really paranoia when so many people have the issue. I know three other guys here with E92 335's and they all have the squealing issue too. Seems to be pretty prevalent.

Ya'all have me totally paranoid...I have been turning my radio down, windows open and craning my neck to make sure my car is still quiet. Good news so far.

Just random babbling...glad some of you are getting this fixed with relative ease.


I wouldn't worry until you hear it. I just noticed it one day.

Might start to use once I have taken my tactical driving class in how-to elude terrorist's and they teach me the fast 180° technique using the parking brake. :D



So do you think using the parking brake all the time when parking contributed to my problem?
No,don't think so. I use it all the time and not an issue.

I had brake squeeling on my older Mercedes. Using the recommendation of the gurus on that board, I took the pads off and ground a bevel into the pads. The pads were perfectly perpendicular to the backing plate. I ground a 45 degree angle into them and all of my noise issues stopped. With only 11000 miles on my 07 I have no idea what the shape of our brake pads are like.

No,don't think so. I use it all the time and not an issue.

Thanks. BTW, I have 19,000 miles on the car. Also since getting it back the parking brake seems to take a lot less effort to use.

I had brake squeeling on my older Mercedes. Using the recommendation of the gurus on that board, I took the pads off and ground a bevel into the pads. The pads were perfectly perpendicular to the backing plate. I ground a 45 degree angle into them and all of my noise issues stopped. With only 11000 miles on my 07 I have no idea what the shape of our brake pads are like.

It's not the pad squealing while braking, it's when you release. It's not the pad it's a sensor rubbing.

if it's the sensor rubbing, can the mechanics do something so it won't rubb onto the sensor?

if it's the sensor rubbing, can the mechanics do something so it won't rubb onto the sensor?

Yes, the sensors can be trimmed. But then when they still squeal, you'll have to scratch your head.

haha, nice..scratch my head if i hear the sound again. well, i guess i'll try to take my car to the dealer to see if they can do some of things that everyone suggested.

Good luck -- I have been to the dealer three times for this issue -- twice because it was accompanied by the "brake" indicator illuminating nonstop on the dash. They adjusted the parking brake shoes, trimmed the sensors one ach axle, chamfered the pads, updated the program, etc...Still squeals intermittently, and I still rebed monthly. I am just biding my time until the pads and rotors are repalced on warranty.

Thanks! This is actually my fourth time going to the dealership. Maybe I will have the issue fixed since I'll be going to a different dealership. :)

Good luck -- I have been to the dealer three times for this issue -- twice because it was accompanied by the "brake" indicator illuminating nonstop on the dash. They adjusted the parking brake shoes, trimmed the sensors one ach axle, chamfered the pads, updated the program, etc...Still squeals intermittently, and I still rebed monthly. I am just biding my time until the pads and rotors are repalced on warranty.

Just ride the brakes all day, everyday...won't take long to wear 'em out. :D

i would do that, buuuuuuuuut my brakes are practically brand new. but we'll see, what the outcomes will be. i'll post it later!

Just ride the brakes all day, everyday...won't take long to wear 'em out. :D

Sof ar it has taken 2 years, 20,000 miles, still on original pads.

I got my car back yesterday and here is what they wrote up:

Parking brake shoes noisy. Verified noise, determined parking brake shoe making noise. Tried to burnish parking brakes, but noise got louder. Replaced parking brake shoes, cleaned and lubed rear brakes. Noises gone, ok.



Parts:

Parking Brake Shoes
Repair Kit Brake Shoe
So hopefully it's fixed. Fingers are crossed.

Guess what's back again? I guess this wasn't the solution. Calling to make an appointment.

Guess what's back again? I guess this wasn't the solution. Calling to make an appointment.
Let me know what you find out. I get this often after my car's warmed up too and just know if I take it in I won't be able to reproduce it.

Let me know what you find out. I get this often after my car's warmed up too and just know if I take it in I won't be able to reproduce it.

Will do, probably won't be taking it in until after the holidays.

wow! on my way to work, i heard the squealing, again. this isn't good. i just got my brake pads replaced about 3 weeks ago or even less? i just don't know what to do anymore!! i guess it'll be my 5th trip to the dealership for this issue :(

its clear that its a common problem. have u guys ever consider ur ride as a lemon?. since u guys brought it in more than 4 times for the same problem, shouldn't that fall in the category of a lemon law?

my brother has a 06 328, and the rear brakes sqeak too. he brought it in so many times. it went away now.

I've got 24k miles on my 06 e90 and have never heard any squeal.. I had a set of pads put on the rear at 19k miles, and even then, no squeal (dealer, warranty work)...

My ideology on brakes is stay ahead of the issues... I remove all wheels at least once a month and scrub the inside of the wheel and tires with a stiff brush and soap, abrasive powder if needed... I then scrub the wheel hub... Of course, I never scrub the outer finish of my wheels...

This is what I have done with every car I've owned and never had braking squealing issues... It's a knuckle-busting job, but your wheels always look great...

Jonathan

this happens to almost every e9x all the fucking time. And we dont have a perma fix for it.

this is a link to a lot of e9x having the same problem and finding out that theres no permanent solution for the squeaking from 0-20mph.

http://www.e90post.com/forums/showthread.php?t=48702

I just took my car in today to get the brake rotors chamferred. Doesnt work.:mad

There is a permanent fix, its called having the dealer replace the pads and rotors...but good luck getting them to do that. I have had mine into the dealer now 4 times for this issue, and no luck. The one "repair" they did where they re-bed the parking brake shoes did help for like 1 day, but came back same as before. All of the other repairs don't work (chamfer the pads, re-bed the pads, shave the parking shoes, re-bed the parking shoes, shave the wear sensor)

I had the same issue for 2 weeks. My car would "whistle" when I would start moving and take a left turn. I took it in and was unable to reproduce the issue. Talking to the technician, he said it is most likely the brake sensor grinding against the disc brake.

One thing which I'm not sure is related or not, but I did notice my tires were low on pressure. So I filled them. I did this before I took my car in.

Damn, third time I am going back to the dealer for this. I initially thought it was coming from the front. BMW tech took a ride with me and heard it too. BMW replaced the front pads and it was still doing it.

I took it in a second time and BMW couldn't reproduce and said they would need to get in touch with corporate to see what can be done. So I went to my mechanic. He was able to reproduce and also had me drive around in circles while he listened to the noise. Turns out it's actually the rear driver wheel that is making the noise. Makes me feel that I need to help the BMW tech's troubleshoot BMW issues.

Going back on Monday to have them do whatever they gonna do to the real wheels. I hope they fix it as this noise is driving me really crazy.

I am seriously thinking about getting rid of the car if they can't fix this for the long term. I really love the car but can't stand the noise. I can't believe that BMW has this kinds of problems and they have not noticed that it is a chronic issue. They should really work on a long term solution for this as it is causing countless trips to the dealer for many owners.

Never in the history of my car experience have I experienced something like this , 2001 A4 1.8T, Acura TL 2006, no embarassing/annoying squeaking problems EVER.

Wow, ppl complaining about rear brake pad squeal and calls the car a pOS? The car out stops every car in its class and then some. Brake squeal + dust dont mean bad brakes. If you want a serene driving experience like you in a sound room, Lexus offers your car.

I knew it was rear pad squeal before even seeing this post on the forums. Get over it, the rear pads squeal, and the pads dust alot. It brakes like no other.

Porsche takes the most hits on those JD Powers satisfaction surveys from you guessed it: Posers who complain about brake pad squeal + brake pad dust.

Wow, ppl complaining about rear brake pad squeal and calls the car a pOS? The car out stops every car in its class and then some. Brake squeal + dust dont mean bad brakes. If you want a serene driving experience like you in a sound room, Lexus offers your car.

I knew it was rear pad squeal before even seeing this post on the forums. Get over it, the rear pads squeal, and the pads dust alot. It brakes like no other.

Porsche takes the most hits on those JD Powers satisfaction surveys from you guessed it: Posers who complain about brake pad squeal + brake pad dust.

Spoken like someone who is very unfamiliar with the persistence, loudness, and frequency of the excessive squealing that has plagued the ownership experience for many BMW enthusiasts - especially those of the e9x 3-series.

I am on my 3rd BMW, all dreiers -- They all have some amount of brake squeal, and a level of brake dust associated with high performance brakes. But, most of them don't sound like a 1970's model school bus when slowing for a red light, and they certainly don't squeal when I'm not using the brake, as is the case for some people on this forum with complaints about brake squeal.

My 2007 328i was in the shop for brake problems 4 times in 22 months of ownership -- clearly a weak point in the car's engineering.

To belittle the complaints of other owners takes a serious of amount of disrespect -- You want to tell us all "wah...boo hoo...my brakes squeal?"

I want to tell you a lot of things about forming uninformed opinions, and making ill-intentioned and unnecessarily divisive posts, but why waste my breath/text ( or stoop to such a low level).

Obviously, you have no comprehension of problem, or the nature of the complaint -- so, leave this thread to people who are here to use the forum to discuss and solve the problems that we face as BMW owners.

/rant

The third time my car went in for this issue (2007 335i sedan) they just replaced all pads and rotors and who knows what else (shot gun approach) and it's now perfect. Though I wouldn't be surprised if it started doing it again later in its life unless the design of the replacement brakes has been fixed (doubtful unless the late 2008 models don't do it at all?).

And to those saying it's not a big deal... it is. Brakes aren't supposed to squeal loudly... especially when you're not even touching the brakes, you're accelerating.

Amazing how blindly defensive people get about their cars. If you're really biting people's heads off over this complaint you're probably the very definition of a fan boy.

Spoken like someone who is very unfamiliar with the persistence, loudness, and frequency of the excessive squealing that has plagued the ownership experience for many BMW enthusiasts - especially those of the e9x 3-series.

I am on my 3rd BMW, all dreiers -- They all have some amount of brake squeal, and a level of brake dust associated with high performance brakes. But, most of them don't sound like a 1970's model school bus when slowing for a red light, and they certainly don't squeal when I'm not using the brake, as is the case for some people on this forum with complaints about brake squeal.

My 2007 328i was in the shop for brake problems 4 times in 22 months of ownership -- clearly a weak point in the car's engineering.

To belittle the complaints of other owners takes a serious of amount of disrespect -- You want to tell us all "wah...boo hoo...my brakes squeal?"

I want to tell you a lot of things about forming uninformed opinions, and making ill-intentioned and unnecessarily divisive posts, but why waste my breath/text ( or stoop to such a low level).

Obviously, you have no comprehension of problem, or the nature of the complaint -- so, leave this thread to people who are here to use the forum to discuss and solve the problems that we face as BMW owners.

/rant

No comprehension ?

I have a 2006 E90 330i. The rear passenger pad squeal when it gets warmed up. Similar to my e46 with aggressive pads (all four corners though). Life goes on.

None whatsoever.

No comprehension ?

I have a 2006 E90 330i. The rear passenger pad squeal when it gets warmed up. Similar to my e46 with aggressive pads (all four corners though). Life goes on.

Most of these issues mentioned on this thread have nothing to do with the act of actually braking. Most of the problems listed here are when you are accelerating, foot completely off the brake, and you get the squeal. I agree, BMW brakes are knows to squeal some, dust, blah blah blah, but that's not really what is being discussed here. I would get over the squeal during braking, but not during acceleration. Thanks for chiming in on something you obviously didn't read up on though.

Damn, third time I am going back to the dealer for this. I initially thought it was coming from the front. BMW tech took a ride with me and heard it too. BMW replaced the front pads and it was still doing it.

I took it in a second time and BMW couldn't reproduce and said they would need to get in touch with corporate to see what can be done. So I went to my mechanic. He was able to reproduce and also had me drive around in circles while he listened to the noise. Turns out it's actually the rear driver wheel that is making the noise. Makes me feel that I need to help the BMW tech's troubleshoot BMW issues.

Going back on Monday to have them do whatever they gonna do to the real wheels. I hope they fix it as this noise is driving me really crazy.

I am seriously thinking about getting rid of the car if they can't fix this for the long term. I really love the car but can't stand the noise. I can't believe that BMW has this kinds of problems and they have not noticed that it is a chronic issue. They should really work on a long term solution for this as it is causing countless trips to the dealer for many owners.

Never in the history of my car experience have I experienced something like this , 2001 A4 1.8T, Acura TL 2006, no embarassing/annoying squeaking problems EVER.

I thought I posted this before. I swore it was the front but it was a rear sensor that was making the noise. I would have bet money it was the front. They ground some sensor down and it stopped, but I do hear it coming back. I'm not too worried about it, I'll just be the annoying guy that makes them fix it.

Although I was wrong on the location, I'm willing to bet it has something to do with the "hill hold" feature not releasing all the way.

Although I was wrong on the location, I'm willing to bet it has something to do with the "hill hold" feature not releasing all the way.

+1

Most of these issues mentioned on this thread have nothing to do with the act of actually braking. Most of the problems listed here are when you are accelerating, foot completely off the brake, and you get the squeal. I agree, BMW brakes are knows to squeal some, dust, blah blah blah, but that's not really what is being discussed here. I would get over the squeal during braking, but not during acceleration. Thanks for chiming in on something you obviously didn't read up on though.

I indeed read it from the beginning.

2006, 330i, rear brakes squeal accelerating all the way up to ~15mph after they get warmed up. yada yada.

Its probably the pads' metal grips rubbing inside the caliper piston recession. A slightly different pad design by a 3rd party vendor may fix the annoyance. Akebono pads come to mind, and should fix the "They dust too much" bitching to boot.

In fact, everyone who complains about the brakes in this post should head to tirerack, order some Akebonos and put them in. You will love the lack of dust, but you can then start a "These bmw brakes suck at braking" thread. After that thread is started, you can put the OEM pad compound back in, and re-visit this thread to complete the circle.

A day at the track fixed my squeal for almost two months. Less expensive than new shoes and a lot more fun!

You can also just drive with one foot on the brake and one on the gas for a while. Heat the brakes up good and they stop squealing

Had the same problem. This dealership had a good way of fixing them. First they found that my pads and rotors were under the warranty spec line.. got those replaced. They also found the sensor was rubbing up against the rotor. They fixed this by wrapping it in a velvet tape or something like that. 6k miles since no squeak...