Front brakes locking up

Asked by GuruHKDFC Jul 28, 2019 at 12:40 PM about the 1994 BMW 3 Series 325is Coupe RWD

Question type: Maintenance & Repair

On my bmw the front brake drag caliper are good replaced booster, master
cylinder, abs hydraulic control unit and still happens

2 Answers
103,215

KenF answered 5 years ago

Only part you didn't mention are the brake hoses (the flex line that runs to the caliper). When they go bad they can turn into a one way check valve for brake fluid.

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GuruF9J6K answered 4 years ago

Wats up, I had same issue with my e46 m3 it was my master cylinder. Make sure if you install a used one it had not been sitting around. They go bad. If you get a used one make sure it’s straight from a running donor car like I did. Good luck Mike bmw90m3

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