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I have no idea what it means, but that -2.2x% multiplicative value would drive me crazy till I found the source of it. May be totally unrelated though.
I could be wrong but I believe even though it's probably well with-in 'specs', should ideally be 0%. The fact that it's (in my mind) significantly different than the other bank makes me wonder if you have any air/oil leaks on that side.
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2007 X5 4.8i - 12/06 Build - Silver/Black - 3rd Row
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