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      01-29-2014, 05:56 PM   #13
winkyyee
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Drives: X3 and 535i
Join Date: Mar 2013
Location: NY

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Coolant Expansion Tank Defective

2011 X3 35i - I had the same warning error message every morning during a cold startup. Error message goes away when the car is warmed up. No visibles on the garage floor overnight. Dealer service pressure tested my cooling system and determined I have a pin hole leak in the expansion tank seam. New part coming under warranty.
Appreciate 0