Quote:
Originally Posted by aremmell
I found that my brand new (<1K miles) M4 seems to have a stuck or frozen parking brake when first transitioning from stationary to moving backward out of the garage, even after warm-up. I can feel tension build up, and it makes a slight pop sound and then I'm good to go.
Otherwise it's been totally fine in the cold.
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That happens when you clamp down the pad onto the rotor when it’s wet. It sits overnight and develops surface rust which locks it in place and when you move, it’s pops it off. If you’re in snow or other wet conditions (even washing the car) you will probably experience this. In some cases, if you back out a little and then stop and go check the back rotor, you will see the pad outline on the disc itself.