Thread: Problems with my Z4
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      01-18-2017, 07:34 PM   #7
sudoer
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Drives: 2004 Z4 3.0i, 2006 X3 3.0i
Join Date: May 2015
Location: San Francisco, California

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Possibly a vacuum leak in your brake booster. Try pinching off the vacuum tube to your brake booster.
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