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Old 03-17-2014, 10:05 PM
lhordmclain's Avatar
lhordmclain lhordmclain is offline
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My 2 cents...

Based on my experience and the parts specs I use to maintain my X
You should check your parts specs also and compare the min/max thresholds

(NEW)
Front Pads Set (14mm thick)
Rear Pads Set (12mm thick)

If you see 3mm (1/8th of an inch) or less pad remaining, you need to replace the pads. The 3mm mark is where the brake pad sensor begins to rub on the rotors and eventually the sensor is destroyed which causes the “low pads” warning light, which is different than the “brake service required” message.

BRAKE Wear Sensor Inspection

The sensor has 2 elements, one wears off when the brake pad is @ half life, the other wears down and sets off a critical brake warning saying your pads are due to be changed NOW!

I always replace Brake Anti-Rattle Spring Rear every 4 years

Rotors

The front rotors started life at 30mm thick. You are allowed 1.6mm of total wear, so the rotors should be replaced when they are 28.4mm thick. The rear rotors started at 12mm thick and should be replaced at 10.4mm.
__________________
Build Date: 06/2004

2004 E53 3.0L 6 Cyl
Engine Code: M54
AT: 5L40-E/GM5 (A5S 390R)
http://s101.photobucket.com/user/lho...in/library/E53

2004 E46 M3 Coupe 3.2L 6 Cyl
Engine Code: S54
MT: S6S 420G - 6 speed
http://s101.photobucket.com/user/lho...in/library/E46
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Build Date: 10/2008
2009 E90N 328xi Sedan 6 Cyl
Engine code: N51
AT: GA6L45R/GM6
http://s101.photobucket.com/user/lho...in/library/E90
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