Replace the lower oil sump section

• Loosen nuts (1)  .
• Remove oil-level sensor (2)  .

Courtesy of BMW OF NORTH AMERICA, INC.

Prepare the oil-level sensor 

• Replace sealing ring (1)  .

  Parts:  Sealing ring

Courtesy of BMW OF NORTH AMERICA, INC.

• Replace the lower oil pan section.

  Parts:  Lower oil sump section

• Position the oil-level sensor (2)  .
• Tighten nuts (1)  .

Courtesy of BMW OF NORTH AMERICA, INC.