Probably an xi thing - the oil pan configuration is different because of the front differential.
Originally Posted by joeycannoli
Not sure as i am not that familiar with all of the models yet, but i am jealous you don't need to remove the panel.
My 328i doesn't need to either.
2003 E39 M5 Lemans Blue: The most amazing car ever built
1999 E46 328i Bone stock 5-speed: Soon to be track rat
235K and still running strong