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Originally Posted by weasel56
That (#7) in BMW terms is the "DISA flap" and controls the adjustable intake runner length system.
And for what it's worth, I almost never change MAF sensors at the dealer. Pretty much the only time I change them is when I read too rich at idle and the air flow reading is skewed from what it should be.
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I've got the one they took out and I'm going to look at it tomorrow. The flap had become disconnected completely, and what they tell me is that air was being drawn in through the control box and entering the intake manifold where the shaft should have been. I've got all the parts - never heard of this happening but I guess it's possible.
That's all they changed, put on 100 miles since then and no SES, I'll check the codes in the morning just to be sure.
03-07-2009, 01:07 AM
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