Quote:
Originally Posted by gsrbri
In my experience with the M brakes (F8X), if you don't daily drive the car, and it tends to sit for periods of time, the caliper pins dry out, especially if you're washing frequently. Even worse if you are blasting water into the wheels to rinse them during your wash (as I do). This can blast some of the caliper pin grease off.
The pads slide on the pins (2 each side) and they are parallel to the anti-rattle pad clip. My RF caliper began to groan and hang up. I pulled the pads out, greased the pins, and voila - caliper working perfectly.
See attached photos
Good luck! My guess is this will solve your issue unless it's something w/your electronics also.
If you need any help with this, just ask. I've worked on both my M4 and M2 brakes maybe 100 times (pad swapping for track, lubing, etc.). Lots of hours learning this great/simple fixed caliper system
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This is really, really good info - thanks!!!