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      08-30-2019, 12:58 PM   #36
dtla1
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Drives: 2011 135i, Space Grey
Join Date: Apr 2014
Location: Silicon Valley

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Quote:
Originally Posted by 3k1n View Post
Hi I was hoping I could get some input from some of you experts. I have had about 5 track days on my stock 135i front caliper pistons and boots. I've been experiencing vibration while on the brakes at higher speeds. I have replaced the pads and rotors multiple times and the problem manages to come back every time. Could the issue be due to the stock caliper pistons sticking and causing uneven pressure on the pads therefore uneven wear on the pads?
Could be, or also might be your ceramic pistons starting to crumble a little. Or maybe a slight bend in a wheel or unbalanced tire that shows itself when you get on the brakes hard.
Appreciate 0