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      05-08-2012, 11:34 PM   #1
nesnith
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Yet Another Squeaky Post

Fellas,

My 2006 330i sedan is having an interesting squeaking problem, hopefully you can help me resolve.

Squeaky comes from the front wheels when accelerating through a turn at low speed (foot on accelerator).

When turning right, left wheel squeaks. When turning left, right wheel squeaks.

Squeaking happens when temperature is warm.

Squeaking goes away if I apply the brake at the same time.

Anyone had similar issue? Any ideas?
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      05-09-2012, 10:54 AM   #2
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Check your suspension, i bet its the spring
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      05-09-2012, 10:56 AM   #3
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Sounds similar to what Sara was experiencing...get her in on this thread!
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      05-09-2012, 04:12 PM   #4
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It's the brakes. It's a very common issue with E9X 335is all over. Search brake squeak and tons of threads will show up.
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      05-09-2012, 04:14 PM   #5
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I'd say either brakes or the sensor thingy on the brakes. Took mine to the dealer and they replaced pads & sensors.
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      05-09-2012, 07:46 PM   #6
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Might as well buy some break cleaner and spray it hard, cant hurt to try and its cheap.
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      05-09-2012, 08:24 PM   #7
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But the thing is the squeaking would go away if I actually apply the brake.

So does that mean the brake pads are not cleanly separated from the rotors when I let go of the brakes?

I still have quite a lot of pads left, so if it is the sensors, does that mean the sensors are not seated properly?
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      05-09-2012, 09:10 PM   #8
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its the stupid brake sensors and all that annoying oem brake dust.. I'm getting my rotors and pads replaced this friday for that very reason. exact same thing happens to mine.. if you drive fast and jam on the brakes, the sound will go away for a little while.
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      12-17-2012, 04:18 AM   #9
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Updates:

I still haven't figured this out yet. I have changed the front rotors, pads and sensor. The squeaking still exists.

It is not the brake pad sensor because both wheels squeak even though the sensor is located only on the left hand side.

I tried pushing the dust shields away from the rotors, still no success.

The following video captured by another forum member best indicates the squeaking noise I am experiencing:
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      12-21-2012, 02:37 PM   #10
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Any suggestions??
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      12-21-2012, 03:49 PM   #11
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Had the same issue, dealer replaced rotors/pads all the way around (twice) noise kept coming back. Then I went to the track, boiled my fluid, super heated my pads(smoke coming off of them), mirrored my rotors. Noise went away lol, hasn't been back since. Not really helpful but it will be fun as hell. Also replacing everything this weekend we'll see how that goes.

tl;dr. noise has always been there after rotor/pad replacements only went away after nearly killing brakes on track.
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      12-21-2012, 05:13 PM   #12
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This led me to think that the noise is coming from somewhere other than the brakes and rotors.

What other rotational parts are there connecting to the wheels?

I have already checked the wheel bearings by wiggling them. They didn't budge.
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      03-03-2013, 03:26 PM   #13
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Updates:

Indy shop applied lubricant to front strut mount bearings two weeks ago. The squeaking had not come back so far.

So, if you have similar problem. It will be a good idea to check your front strut bearings as well.
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