17 11 100 Removing and installing/replacing the coolant expansion tank (N63O1)

Necessary preliminary tasks: 

• Drain COOLANT .
• Remove WHEEL ARCH COVER (REAR SECTION) front left

Release screws (1).

Tightening torque 17 10 2AZ .

Unlock connector (2) on coolant level switch and disconnect.

Fig 1: Identifying Connector On Coolant Level Switch And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Pull expansion tank (1) forward.

Release and disconnect coolant hoses (2).

Release and disconnect coolant hoses (3).

Feed out expansion tank (1) toward the front and remove.

Fig 2: Removing Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Top up COOLANT .

Check cooling system for LEAKS .