BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      08-11-2013, 01:48 PM   #1
grunyon
Enlisted Member
11
Rep
36
Posts

Drives: 2008 BMW 135i
Join Date: Apr 2012
Location: Flemington, NJ

iTrader: (1)

Squeaky brake wear sensors?

Hello,

I suspect that I have squeaky brake wear sensors. My brakes have always been squeaky but if I rode them hard they would be silent again for a few hundred miles. The other day I was driving down my driveway and coming from my front driver's side suddenly there was a sound like something flipped up and got stuck in the brake mechanism but after about 50 feet of driving it corrected it's self. Ever since then, I get a painful-to-listen-to squeal that seems to be very loosely linked to whenever I brake. It definitely happens during braking but then sometimes hangs around for a few seconds after I lift off the brake pedal. It can also sometimes be casually heard at low speeds, and also sometimes heard mid corner.

I took the tire off and visually inspected the brakes but I found nothing suspicious looking. I used an air gun to try to blow anything out that I could. The noise was still there.

On some rare occacions when driving in a straight line at very slow speeds, I can hear a slight squeak from my passenger rear tire as well.

I know these two wheels are where the brake wear sensors are. They aren't supposed to make noise when the brakes are low or anything right? They're just supposed to set off a dash light? Is there anything I can do to shut the sensors up? Where can I find out how they are installed and removed? Maybe I could coat them with that stuff that's meant to fix squeaky brakes?

Thanks for any suggestions.
Appreciate 0
      08-11-2013, 07:15 PM   #2
e36addict
Captain
United_States
122
Rep
950
Posts

Drives: 2013 X1 35iX
Join Date: Jul 2013
Location: Tim @ BMW of Dallas

iTrader: (5)

If the brakes are worn to the point that the sensor is contacting the rotor, they can get very noisy. There is a bulletin out for this issue on all models. Pretty much the only fix for it is to replace the pads, rotors and sensor. Depending of course on the thickness of the rotors you may be able to get away with just pad replacement. Brake squeal is extremely hard to get rid of on these cars.. Either I'm lucky or I drive hard enough that I don't have any noise. On my mothers 135 I have tried everything to resolve the issue but I just can't make it stop.. good luck!
__________________
'13 X1 35iX, '98 Z3 2.8 Roadster, '99 Z3 2.8 Coupe , '96 Z3 1.9 DASC, '13 Smart Fortwo
Appreciate 0
      08-12-2013, 10:29 AM   #3
WPG D33Z
First Lieutenant
19
Rep
316
Posts

Drives: 2008 135i vert Cobb Stage2
Join Date: Mar 2012
Location: Winnipeg, Canada

iTrader: (1)

I just removed my sensors on the weekend and my car is silent now! I had about 30-40% left on the pads and the sensor did look like it was rubbing. Mine would only make noise right before coming to a stop.
__________________
2008 SGM 135i Cobb Stage 2 FBO
2008 TS X3 MSport KW V2
Appreciate 0
      08-12-2013, 12:18 PM   #4
1911A145
Captain
1911A145's Avatar
31
Rep
770
Posts

Drives: 135i
Join Date: Mar 2012
Location: Port Saint Lucie, FL

iTrader: (4)

Quote:
Originally Posted by WPG D33Z View Post
I just removed my sensors on the weekend and my car is silent now! I had about 30-40% left on the pads and the sensor did look like it was rubbing. Mine would only make noise right before coming to a stop.
So... you just took them out and didnt replace them? Any lights on the dash or anything alerting you that the sensors are not in or the brakes are due?
__________________
| COBB E30 | VRSF DP's | ETS 5" FMIC | BMS DCI |

393 RWHP / 434 RWTQ
Appreciate 0
      08-12-2013, 06:59 PM   #5
grunyon
Enlisted Member
11
Rep
36
Posts

Drives: 2008 BMW 135i
Join Date: Apr 2012
Location: Flemington, NJ

iTrader: (1)

Please do tell. I might remove mine.
Appreciate 0
      08-19-2013, 11:48 AM   #6
WPG D33Z
First Lieutenant
19
Rep
316
Posts

Drives: 2008 135i vert Cobb Stage2
Join Date: Mar 2012
Location: Winnipeg, Canada

iTrader: (1)

Quote:
Originally Posted by 1911A145 View Post
So... you just took them out and didnt replace them? Any lights on the dash or anything alerting you that the sensors are not in or the brakes are due?
That is correct, no lights or warnings. Lights will only go off if the sensor has worn through. My rear sensor wasn't even installed, looks like it was missed at the factory!
__________________
2008 SGM 135i Cobb Stage 2 FBO
2008 TS X3 MSport KW V2
Appreciate 0
      08-09-2021, 07:56 PM   #7
trajan98
Registered
0
Rep
1
Posts

Drives: BMW 135i
Join Date: Aug 2021
Location: Canada

iTrader: (0)

I did same thing as WPG D33Z removed the sensor on the front driver side. It was the only wheel making the squeaking noise. Brake pad was still over 50% so once I saw the information posted here I decided to remove the sensor. The sensor actually broke off when I tried to remove it. It was rusted and corroded..I had to hammer it out once I took the brake pads off. Just thought I would pass that along as the squeaking was driving me nuts! Thanks for all the info here.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 12:23 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST