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Old 02-04-2013, 08:41 AM
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gfeiner gfeiner is offline
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Location: Houston, TX
 
Join Date: Jun 2003
Posts: 543
Mein Auto: 2012 X3 xDrive35i
If it has any wear, they will also replace the brake pad wear sensor. That sensor rubs against the rotor when the break pads reach minimum thickness, thereby completing a circuit which alerts u to the fact the pads must be changed asap. Once it wears/rubs like that, it can't be reused

The rear sensor is #12 in this diagram. There is one sensor for the front brakes and one for the rear

http://www.realoem.com/bmw/showparts.do?model=WX73&mospid=52682&btnr=34_1929&hg=34&fg=13

Last edited by gfeiner; 02-04-2013 at 08:43 AM.
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