Thread: Changed Master Cylinder. Pedal still going to floor?!
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Old 03-02-2021, 06:57 PM
cn90 cn90 is offline
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You still have air in the system.

Best is to press the brake pedal all the way down (engine off) and hold it there for a good 30 sec or more.
This way any air trapped in the MC can travel upward back into the reservoir.

Please update the thread if it works or not.
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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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