I've recently been getting charged for shipping back to RockAuto when returning a faulty part so not at all worth it to even try the cheaper stuff any more. Just went through this again with a Vaico VANOS solenoid for the N52, total crap.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)