- I have the same leak in my 2004 E83 X3 2.5L engine. I think it is from the oil pan gasket, which is a PITA job.
- So I asked the gurus in the E39 5-series forum re does it leak when car is OFF. The answer is below:
Replaced oil pan gasket:
https://www.bimmerfest.com/forums/sh...532166&page=14