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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sat, Dec-23-2017, 02:11:52 AM   #1
NolliM3
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Default Brake Pad Sensor Connector

Lots on maintenance going on and I wanted to change the brake pad senor that had the wire cut close to where it plugs into the brake pad. So I open the connector box only to see that the connector from the harness is broken off and seated down into the connector. Looking down the new brake pad sensor, I realized that it has a grove for the harness connector to slide in...if the harness side has a tab to twist, that's all broken off (dry rotted) and pulling on the wire doesn't guarantee anything but possible breaking the wire. I would like to have it working as it's a part of the ABS that has triggered the ABS light on the dash...I got the car like that.

Has anyone else had this and what had you done to resolve this? Also, I am open to suggestions from others.
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Last edited by NolliM3; Sat, Dec-23-2017 at 02:24:22 AM.
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Old Sat, Dec-23-2017, 01:18:16 PM   #2
M_Parallel
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Default Re: Brake Pad Sensor Connector

Trying to visualize this, but no luck.

ABS has no relation with brakepad sensor if that’s what you’re saying.
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Old Sat, Dec-23-2017, 06:42:32 PM   #3
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Default Re: Brake Pad Sensor Connector

Thank you M_Parallel for responding...here are some pic:

[url=https://flic.kr/p/22MWBFR]

[url=https://flic.kr/p/HRotWV]

I had seen this person's video (https://www.youtube.com/watch?v=pFdQ_8mU9T8) on replacing the front wheel bearing where he suggested that the brake pad sensor will cause the ABS light to come on. So having that problem since I got the car as well as the PO took the car to a BMW "master mechanic" that could not figured it out, I decided to use DIS to diagnose...that where it led me to.
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Old Sat, Dec-23-2017, 06:58:37 PM   #4
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Default Re: Brake Pad Sensor Connector

That person suggested wrong. There is no link to the ABS.

You can get a new connector plug housing (new or junk yard) and transfer over the pins.
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Old Sat, Dec-23-2017, 08:21:19 PM   #5
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Default Re: Brake Pad Sensor Connector

I believe this is the male connector in case you want to fix that mess.
https://www.ecstuning.com/b-genuine-...l/61131393742/
Hopefully you can get the old one out without breaking the female connector.
Transferring the pins is an easy job. There is a locking piece in the center of the connector that you pop up (you can see it in the ESC pictures).
Anyway, I believe this is the right connectors as I just did this for my rear ABS connector which I believe is identical to the brake sensor connector.
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Old Sun, Dec-24-2017, 08:10:34 PM   #6
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Default Re: Brake Pad Sensor Connector

The other connector is for the ABS sensor. Could be the plug as
well, or the sensor.

You just have both problems as the same time, but they are not related. That would’ve been a major design flaw if that was the case.
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Old Sun, Dec-24-2017, 10:17:29 PM   #7
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Default Re: Brake Pad Sensor Connector

Quote:
Originally Posted by JitteryJoe View Post
I believe this is the male connector in case you want to fix that mess.
https://www.ecstuning.com/b-genuine-...l/61131393742/
Hopefully you can get the old one out without breaking the female connector.
Transferring the pins is an easy job. There is a locking piece in the center of the connector that you pop up (you can see it in the ESC pictures).
Anyway, I believe this is the right connectors as I just did this for my rear ABS connector which I believe is identical to the brake sensor connector.
Thank you JitteryJoe for the link...checked but ECS warned it won't work with the 95M3.
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Old Sun, Dec-24-2017, 10:29:59 PM   #8
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Default Re: Brake Pad Sensor Connector

Guys, I understand what everyone is saying regarding the brake pad sensor has nothing to do with the ABS...I was thinking about it been a part of the brake electrical system.

I cleaned the front sensor since DIS pointed to the driver side. I also saw Richard Sperry mentioned on BimmerForum to check the sensor at the Diff. It seems that I might be able to use a pointed nose pliers to pull on the connector...wish me luck. I will also use DIS diagnostic later...just wasted the day fighting with installing braided stainless steel brake line to the passenger hard line...something that should have taken five to ten minutes...my fingers are sore now.
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Last edited by NolliM3; Sun, Dec-24-2017 at 10:38:28 PM.
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Old Sun, Dec-24-2017, 11:13:12 PM   #9
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Default Re: Brake Pad Sensor Connector

Quote:
Originally Posted by NolliM3 View Post
Thank you JitteryJoe for the link...checked but ECS warned it won't work with the 95M3.
Odd since the brake pad wear sensors are the same part number for 95 & my 98.
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Old Mon, Dec-25-2017, 12:39:03 AM   #10
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Default Re: Brake Pad Sensor Connector

Quote:
Originally Posted by NolliM3 View Post
Guys, I understand what everyone is saying regarding the brake pad sensor has nothing to do with the ABS...I was thinking about it been a part of the brake electrical system.

I cleaned the front sensor since DIS pointed to the driver side. I also saw Richard Sperry mentioned on BimmerForum to check the sensor at the Diff. It seems that I might be able to use a pointed nose pliers to pull on the connector...wish me luck. I will also use DIS diagnostic later...just wasted the day fighting with installing braided stainless steel brake line to the passenger hard line...something that should have taken five to ten minutes...my fingers are sore now.
I have a few spare diff speed sensors if you need one - people often think this will fix an abs problem but usually it does not - if the Speedo works the diff sensor is good. The abs sensor at each wheel does the abs. Whenever I have a hub off for some reason I clean the ring and sensor, which usually are shed in brake dust. Sensors don’t last forever but they last a long time. They often break if you try to remove them. You have to be patient and wiggle and pull abs use lots of penetrant.
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Discussing Brake Pad Sensor Connector in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)