I would check the cover to make sure its flush, but that would not cause dirty air to bypass the filter. Id be looking at leaks in the filter or after the filter. Check that the intake boot is tight on both ends, the crankcase breather fitting and the line to the wastegate solenoid are not leaking.Unfortunately I left my X3 at my camp ground after last weekend so I cant grab a picture at the moment. The whole intake track has a slim coating of dust including the turbo blades. I did notice the cover fit pretty crappy (same as rcr1978's on the previous page). Maybe the cover is like that the filter isn't siting flush? I put some grease on the lip of the filter and it didn't help. I think I might swap back to my 2019 air box before the turbo or engine gives out. Hopefully I didn't cause any long term damage.