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      03-13-2012, 06:10 PM   #6
VictorH
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Drives: '09 M3
Join Date: Dec 2007
Location: SC

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Yes, that's certainly an option. Though I think the Roundel tech guy says you should probably change 4-5 times if you just drain the reservoir and refill. By my method with pulling off a hose and draining the whole thing you are supposed to drain and refill twice to get everything. Either way is probably a bit excessive as long as you change on some sort of regular frequency.