Thanks for the clarification. I saw a YT video where a N62 PCV diaphragm caused smoking, but not fuel smell.

Injectors was my first guess too, especially with the age, it turned 21 in October. It seems like the fix if the injectors themselves aren't bad is to replace the two o-rings, correct?

https://www.fcpeuro.com/products/bmw...ng-13641437487

The o-rings on my transmission's Mechatronics sealing sleeve were shot about four years ago, despite the low mileage and garage queen status.

EDIT: The smell is definitely from the engine bay.