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By disconnecting the air intake from the intake box and plugging it there with an inflatable plug. Then sending smoke through that. I also did a vacuum test with a manometer and got 0mbar of pressure. Same exact test on my buddies 2024 read -10mbar(within BMW spec at idle).

I've posted this on Reddit and Bimmerpost but can't get any traction. Hoping MKV 3.0 owners can chime in. I have a 2022 M340i which I recently purchased from an auction. Vehicle is stock as far as I can tell. 38k miles on the odometer. Check engine light since day one. No smoke out the tail...