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Thread: Front brakes locked up while parked in garage

  1. #1
    Join Date
    Apr 2021
    Location
    Millersville, MD
    Posts
    3
    My Cars
    2021 M4 Competition Coup

    Front brakes locked up while parked in garage

    12k miles on my new M4C, loving every bit of it. Last week I had the car in the driveway and washed it, including the wheels. Afterward pulled the car in garage, no issues. Over the next several days, I waxed the car, while still parked in garage, and wiped down the wheels. Then one day started it up and put it in reverse but it would not budge. Put it in Drive, no dice, locked up. At this point I didn't know what was what, did Electronic Parking Brake get set (It was not indicated Set). I have a 2-post lift in garage so was only minutes before I had it off the ground, and verified front wheels locked, which has to be the Brakes because car is Rear Wheel Drive. Put her back on floor, and tried again to force the car to free up by Reverse, left wheel released, and finally right wheel released too. Is it iron oxide between brake pads and rotor that set up like glue after being wet? These are M Compound brakes not Carbon Ceramic. Thoughts?

  2. #2
    Join Date
    May 2007
    Location
    Ottawa Ontario CANADA
    Posts
    20,507
    My Cars
    21 M3 6MT Dravit/KO/ZPP
    I've had that happen on multiple BMWs. Good practice is to take the car for a short drive and use the brakes (or even ride the brakes at low speed) to have them dry a bit before parking.
    Current Car (delivered 20/10/21): 2021 G80 M3; 6MT; DravitGrau/Kyalami Orange/Black Extended Merino; Permium Pkg (ZPP); 826M bicolor wheels; Black M Compound brakes; Sunroof (yes no CF roof)
    (more pictures here)

    Previous Cars: 2018 F30 340ix 6MT Msport(Dec 2017 - Sep 2021); 2013 F30 335ix 6MT Msport (Nov 2013-17); 2011 e90 328i 6MT ZSP (Aug 10-Nov 13); 07 e90-323i ZSP (May 07 - Aug 10); 97-318ti ZSP (Feb 97 - May 07)

    "Mit der Dummheit kämpfen Götter selbst vergebens", Friedrich von Schiller -- "Life is simple, people make it complicated", Me (About me)

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