how would i know if the brake master cylinder of my bmw 316i 2004 model is deffective?

Asked by Dec 04, 2013 at 08:09 PM about the 2004 BMW M3 Coupe

Question type: Maintenance & Repair

when i was travelling my brakes are like stacking up and then i loose my brakes then, but
when i stop the engine and rest it for a while when i start it back the brakes are on?and i
seek the opinion of the mechanic he said that the problem was the brake master cylinder
because the pressure of it is low?is this right?

1 Answer

223,575

He's right, the pedal sinking to the floor could be a leak at a caliper or one of the lines or a bad master cylinder.

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