17 11 100 Removing and installing/replacing coolant expansion tank (N62)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Drain coolant from radiator

Release and disconnect coolant hoses (1).

Unlock plug on coolant level sensor and disconnect.

Unfasten screws.

Remove coolant expansion tank (2).

Fig 1: Removing Coolant Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Insert locating pin in rubber grommet.

Check cooling system for leaks.