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      01-26-2013, 11:34 AM   #5
sashah60
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Drives: 16 F80 M3
Join Date: Aug 2007
Location: NY

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OP- I have had similar issues twice. It turned out to be a hairline fracture in the rim. It will only loose air very slowly while driving. Have then take the wheel and slowly rotate it in a water bucket and focus on the rim and not the tire.