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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 01-21-2010, 10:29 PM
Bunky Bunky is offline
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Brakes that squeak no matter what

Hello everyone,

I have a quick question. Over that last 3-4 months, my brakes have been very squeaky. I think it's the back rear left that makes all the noise. It used to be that they would squeak in the winter when dirty with salt, etc. from the roads or in the summer when my car hadn't been washed in a while, but now they squeak all the time whether clean or not, even before it got cold here in MN.

I brought in my car last week for maintenance/service and had them check the brakes, and I guess they are 9-10mm and apparently are too thick to cause sensor noise. Anyone have any tricks on getting a dealership to address this anyway?

I guess what I'm saying is that it's RIDICULOUS to pull up in a flagship BMW and have loud squeaky brakes. I just don't get it. I've owned way less luxurious vehicles over the years that NEVER had squeaky brakes. It's just unbelievable to me. I'm going to head back to the dealership and take the service manager for a ride, and see what he says my options are.
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  #2  
Old 01-22-2010, 03:31 AM
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GKT33 GKT33 is offline
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Have you looked at the rotors for grooves cutting into them? You could have some debris between the pad and rotor. And you can also try spraying a high pressure hose from the inner part of the rim to blow them off. The only other thing left after that are glazed rotors or new pads. Might need the rotors re-surfaced. (turned)
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  #3  
Old 01-22-2010, 08:28 AM
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STRTWYZ STRTWYZ is offline
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  #4  
Old 01-22-2010, 08:33 AM
745ByMySide 745ByMySide is offline
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I think they all squeal, mine do even since new brakes were installed.
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  #5  
Old 01-22-2010, 08:55 AM
Bunky Bunky is offline
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Well, again, I just think it's unacceptable with an automobile like this. Also, I would think as a carmaker, I would be embarrassed if my flagship model had a common problem like this. Maybe on a Chevy Cavalier (do they make those anymore?!?), but not a 7-series. I felt the same way about the moonroof noise issue. I was completely floored by the response, "A lot of the 7-series have this problem, people just learn to accept it." Again, I have driven much less expensive cars before I could afford this car that had moonroofs that never made noise. It's BMW for God's sake, and they can't figure out how to make a correct seal?!?!? I guess my standards are just too high.

Now, before anyone jumps on me about being too critical, I do LOVE my car, and it is amazing. I just find these details frustrating.
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  #6  
Old 01-22-2010, 09:27 AM
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coug60 coug60 is offline
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A lot of times what will happen is your brakes get glazed... One the ways this can happen is if you ride the brakes a lot and they get over heated.
The only cure is new pads and having the rotors turned to put a new finish on them... and start out fresh.
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  #7  
Old 01-22-2010, 09:53 AM
Lugn Lugn is offline
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My brakes never squeals. Not once.
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  #8  
Old 01-22-2010, 09:55 AM
Lugn Lugn is offline
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Talk to the dealership again. If the noise goes away when you close the inner lid, you most likely need a new seal. I had mine replaced under warranty a few months back, and it's now as quiet as one would expect. I'm pretty sure there's a bulletin out for this.

Edit: Just to clarify, this post was in regards to your noisy moon-roof...

Last edited by Lugn; 01-22-2010 at 11:23 AM.
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  #9  
Old 01-22-2010, 10:50 AM
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GoRavens GoRavens is offline
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Did they say if they added any caliper grease between the pad and caliper. This should help... http://www.crcindustries.com/ei/cont...x?S=Y&PN=05351
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Last edited by GoRavens; 01-22-2010 at 10:54 AM.
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  #10  
Old 01-22-2010, 11:08 AM
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haz1 haz1 is offline
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I always had issue with my 735's brakes squealing, but in part from not adding the grease between the pad and caliper, but like co60 says, may be glazed or the seal. Got to be a reason why, no 7's brakes should squeal, it is very embarrasing I agree, esp at stop lights.
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  #11  
Old 01-22-2010, 11:16 AM
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JPW1 JPW1 is offline
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Yea, I know the feeling. When I got my CPO 2006 750 the brakes squealed the day after I got it. I brought it right back. They replaced the brake pads and it dramatically improved but I could still hear it on occasion. I guess once they got broken in the sound went away. I don't hear it any more. I do remember though how I ticked off it made me at stop lights. You are right, a 7 is the last car that should exhibit this issue.
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  #12  
Old 01-24-2010, 11:54 AM
Bunky Bunky is offline
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Well, I went back in and had a heart to heart with the head service guy. He said that this has always been a tough issue for them. He said that even if I paid out of pocket for new rotors and pads, the noise a lot of times comes back. We apparently have more issues here in MN cuz of our swings in temperature and all the stuff put on roads in the winter. I'm gonna wait until it warms up again and see if it stays as bad and then maybe push the point a little more. We'll see. I'm coming up on the 4 year mark for the free maintenance at the end of April, so I have to decide whether I'm keeping the car or buying an extended warranty. Maybe I'll get a new 7er or a M5...
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  #13  
Old 01-24-2010, 12:36 PM
Lugn Lugn is offline
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Well, I'm in WI with equal temp swings, and I haven't seen a 7 with squaling brakes since I moved here 5 years ago...

Did you get the moon-roof seal replaced? That one should be a no-brainer for your dealer.
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  #14  
Old 01-24-2010, 01:27 PM
gman750 gman750 is offline
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i was told that you have to break harder sometimes when you hear the squeal..I used to break my 750 like I used to do the escalade but eventually I started going harder on it..believe it or not...but try braking harder..
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  #15  
Old 04-19-2010, 11:46 AM
Bunky Bunky is offline
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Hey guys just a followup here. I went over to the new dealership here Minnetonka, MN. I test drove a new 7er and a 2008 M5 (holy crap!) and while I was test driving, I had their service department check my rear brakes. They replaced the pads and sensors and flushed the fluid without ANY B.S. about "BMW brakes sometimes just squeak." I can tell you that the service here (although I really liked my SA at the other dealership) was hands-down way more professional and a better experience overall than the stuff I was told at the dealership in Bloomington, MN. The owner of the place even introduced himself. I will only be using the dealership in Minnetonka from this point forward. I actually decided to head up there based off MANY recommendations from people I work with... they were exactly right!
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  #16  
Old 04-19-2010, 02:17 PM
t_clealy t_clealy is offline
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I was going to recommend you that to try other BMW dealers. If the car still under warr., tell you have brakes pulsations instead of squeaky...squeaky.
Another thing is that if you can't stand the squeaky squeaky, go to " JUST BRAKES " if there's one near you. They're pretty cheap...
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  #17  
Old 04-19-2010, 02:21 PM
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Wilassasin Wilassasin is offline
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Quote:
Originally Posted by coug60 View Post
A lot of times what will happen is your brakes get glazed... One the ways this can happen is if you ride the brakes a lot and they get over heated.
The only cure is new pads and having the rotors turned to put a new finish on them... and start out fresh.
Hey coug wlcome back, ur 6 looks sick!
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  #18  
Old 04-19-2010, 11:29 PM
TechGuy TechGuy is offline
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Brakes squeal due to the fact that you have dead smooth pads on rough edgy discs no matter how much the car is worth. If your discs are getting thin it's time to change them. BMW only allows 0.8mm of skimming and any more than that you are at the risk of cracking them under hard braking. I sugeest you have the pads removed and if they are not dead smooth, sand back to become once again smooth (don't forget to super clean them). Have your calipers thoroughly cleaned and spray off all debri, apply a very thin layer of oil spray on the bolts, replace the discs and the noise will surely disappear.
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  #19  
Old 04-20-2010, 11:36 AM
AllanF AllanF is offline
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my front brakes are squeeking too(both braking and coasting)...Its very annoying and they won't replace them w/o me paying. I 'm going at them again on Thurs when i go to have the Sirius installed.
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  #20  
Old 04-20-2010, 12:27 PM
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Seven11 Seven11 is offline
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Quote:
Originally Posted by AllanF View Post
my front brakes are squeeking too(both braking and coasting)...Its very annoying and they won't replace them w/o me paying. I 'm going at them again on Thurs when i go to have the Sirius installed.
me too

under braking and coasting my brakes squeel

my friend just changed his rear brakes on an m6 and they make tons of noise
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  #21  
Old 10-22-2012, 05:42 PM
Sotomike08 Sotomike08 is offline
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I also have this problem. I have a 2006 m6 and the brakes squeal like crazy, When I come to a stop I feel everyone is looking its very embarrassing. I had a 745i and never had this problem. I will try cutting down the rotors and see what happens.
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  #22  
Old 04-24-2013, 07:52 AM
aro400 aro400 is offline
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"Rotors getting a LIP"...

I just took my car in for service and informed them of a horrible squeaking noise coming from the breaks. I thought it odd as I had replaced them ~10,000 miles ago. They initially told me that they would "deglaze" the brake pads and that should solve it. I get a call this morning saying that deglazing didn't work and that this sort of noise is not uncommon as the rotors have developed a "lip" and you just have to live with it. The only fix is to replace rotors and pads (still have 7mm ~10-15k miles). I told him I thought this seemed absurd for this car and that I could not recall hearing any other cars on the road with squeaking brakes that didn't need brake replacement and how a car that costs upwards to $100k holds this sole distinction is beyond embarrassing. What a crock and complete FAIL on the part of BMW.
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