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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 3-Series E9x Rear Brake Squeal?



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      10-23-2011, 11:04 PM   #1
Fritzables
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3-Series E9x Rear Brake Squeal?

Hi All,

I have a 2007 E90 that over time has developed a rear brake squeal.
I recently took it to my dealer for them to sort out, but was informed that this model suffers from an inherit problem of brake squeal where the sensor will rub on the disc causing the noise.

They did clean the disc and made an adjustment to the sensor but indicated that the noise would likely return in a weeks time - which it has.

Is this really a BMW issue or have people resolved it?

Pete
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      10-24-2011, 06:26 PM   #2
Brian_TII
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Yeah... I've read that it's pretty common... And frankly mine does it too. I haven't tried to fix it even.
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      10-24-2011, 06:59 PM   #3
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Interesting as the sensor is so small and it does not make contact until half pad life.

You could change your brake pads early or uncouple the sensor and keep an eye on pad wear.
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      10-25-2011, 02:40 AM   #4
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i went with aftermarket pads and rotors...no problems since...and almost no brake dust
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      10-26-2011, 08:21 PM   #5
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remove passenger rear wheel and take sensor off the brake caliper
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      10-26-2011, 09:32 PM   #6
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dealer is bullshit

the sensor contact is like a needle, whatever
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      10-27-2011, 04:21 PM   #7
cvc 22349a
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Rear rotors, pads and sensors replaced under warranty over a year ago for this issue. Low speed squeel has returned. I don't think there's a solution
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      10-28-2011, 12:21 PM   #8
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Quote:
Originally Posted by cvc 22349a View Post
Rear rotors, pads and sensors replaced under warranty over a year ago for this issue. Low speed squeel has returned. I don't think there's a solution
That sucks, they covered almost everything, if you use a lonh wheel brush to clean the inside of the rims take a look to make sure the flimsy shield behind the rotor isn't bent and touching the rotor.

It could also be your parking brake, have it checked when you go in next.

With fresh pads it's not your brake sensor, you could try having them pull the pads and re-apply anti squeal paste.
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