17 11 100 Removing and installing/replacing coolant expansion tank (N46, N45, N52, N52K, N51, N53)

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2008 BMW 328xi, 2008 BMW 328i, 2008 BMW 323i, 2007 BMW 328xi, and 2007 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Drain Coolant From Radiator

Unlock and disconnect plug on coolant level switch (1).

Release and disconnect coolant hoses (2).

Release bolts.

For tightening torque refer to 17 11 3AZ in 17 11 RADIATOR AND MOUNTING PARTS .

Remove coolant expansion tank (3).

Installation:

Insert locating pin in rubber grommet.

Fig 1: Removing Coolant Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Check cooling system for Leaks .