Replace the lower oil sump section

Loosen nuts (1).
Remove oil-level sensor (2).
If applicable, remount the oil drain plug.

Courtesy of BMW OF NORTH AMERICA, INC.
Replace the lower oil pan section.
Parts: Lower oil sump section

Prepare the oil-level sensor
Replace sealing ring (1).
Parts: Sealing ring

Courtesy of BMW OF NORTH AMERICA, INC.