Unscrew screw connection of the upper oil sump section (all-wheel drive)

Oil sump screw connection 

Fig 1: Upper Oil Sump Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening sequence of the oil pan

Precondition 

• Unscrew screw connection in sequence (25)  to (3)  .
• Protect the oil pan from falling with the help of a second person.
• Loosen screws (1)  and (2)  .

Fig 2: Upper Oil Sump Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.