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      12-03-2012, 03:04 AM   #31
Drives: 2011 135i
Join Date: Aug 2008
Location: Germany

Posts: 614
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2011 135i  [0.00]
I had this exact same issue on my N55 135i. I had the same yellowish rusty colored liquid, mostly water with just a bit of oil and maybe some fuel. To me, mine smelled a bit metallic like rusty water. I also had the same issue with the O-ring. I haven't got many miles on mine since I emptied it last but I'll have to check again to see if it has returned.
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