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This valve cover fits to 323i e90 n52 engine perfectly. Did it myself, lot's of parts to remove and little wiggle room, needs to have patience, got to take time with electrical connectors. Not sure longevity of the this valve cover and the gasket but going well after 2 weeks. Well packed and nothing missing in the package.
Ordered this valve cover to correct a vacuum leak located around the valvetronic motor. A genuine OEM gasket would not resolve the issue. Well, after removing old valve cover, and replacing with this one (an almost 4 hour job), I ran a smoke test and guess what. I still have a vacuum leak around the valvetronic motor. Looks like I'll have to re-do this job again when the OEM part comes in from another online retailer.
Product seemed like good quality but began leaking oil after a few weeks. Bolts feel very soft when tightening. Have to replace again which is a big headache (plan on the job taking the better part of a day if not done before)