Breaks have a mind of their own! Help! - BMW Forum -
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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#1 (permalink) Old 06-21-2011, 03:32 AM
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Breaks have a mind of their own! Help!

I have had my 1988 325i convertible for about a year and have loved driving it. But recently it has become a little scary as the brakes are completely unpredictacle. At times the car slows as normal when i press the brake pedal and other times the pedal goes straight to the floor with no resistance and the car doesnt slow down til I stamp on the pedal with all my strength. I have had a mechanic check the pads, they are fine. He bled them today and when the brakes engage they are more responsive but they don't always engage. I live on a small island so BMW specialists are pretty scarce so i would be grateful for any suggestions. Thanks
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#2 (permalink) Old 06-21-2011, 08:16 AM
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Could be an issue with the master cylinder seals.

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#3 (permalink) Old 06-21-2011, 02:21 PM
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As Brett says...
Just to add, if it is the seals at fault, you may be as well getting another Master Brake cylinder... Just as cheap as a seal kit in many cases !
Also, just have a quick look at the rear brake flexy pipes.

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