The oil feed tube is important. If it fails the gears will self destruct quickly.

Dont do an oil flush unless you also plan to drop the oil pan to scrap out the sludge.

(Personal experience)

My understanding fits your description. The Valvetronic calibrates each drive cycle from what I've heard. There's some chance a failed sensor can cause similar errors.

Can't wait to hear feedback that it's on and working!

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)