525i My front right brakes grinding

[raakevin]

I did my first brake job on this car and replaced the rotors as well (front only). The brake lining warning light remains lit, however, and I heard that I was supposed to replace the sensor as well is that true?

[marti5]

well, I always replace the sensors, You must have one broken for the light to still be on

[raakevin]

My wife just called and must have put the right front together wrong it is making a racket and pulled her to one side when braking. Will have to take wheel off and see if the caliper fell off or something. I know I put it together tight so just not sure what is up.

I still have the coolant level light and check engine light to deal with. My son thinks the coolant level is a "bubble" in the system whatever that means and the check engine light is typically emissions related possibly a sensor.

[marti5]

Sticky caliper I would say ,give it a good grease up ( with the proper grease or you will rot the rubber), or the pads arent in right

[raakevin]

I used a spray for the first time on the backs of the pads instead of that black grease I can remember rubbing on with my fingers last time I did some brake work. When you say "give it a good grease up" are you talking about the backs of the pads or the caliper itself? If you are referring to the caliper where exactly would I put grease and what kind? Back to the message light on brak lining could that also just be I need to reset the light like a mechanic would have. I got some instructions on how to do that and will try it tonight otherwise will replace sensor.

[marti5]

Point 1. grease up yes the caliper, you will see the piston is incased in rubber, get some proper brake grease from an auto shop, So get a plastic end of a baby spoon (not the end they put in mouth other flat end)or what ever you have like that!!!!, lift the rubber very carefully and smear the grease around the piston, then get the other half to push the pedal down slowly!!, NOT to far as to make the piston pop out!!!.

Make sure you have a G clamp to return the piston in to the caliper, keep doing this 4 or 5 times, until the piston moves in & out freely whilst the other half is pumping .

Point 2:

As for the warning light this will go away once you have remidied the above it should go out, only if you have checked that the sensors are not broken.