Draining coolant

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Open sealing cap (1) on coolant expansion tank.

Installation note:

Close the sealing cap (1) until the arrows line up.

Fig 1: Identifying Coolant Expansion Tank Sealing Cap

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: For purposes of clarity, the fan cowl is shown removed.

Unlock and detach coolant hose (1) from radiator.

Drain, catch and dispose of coolant.

Fig 2: Identifying Coolant Hose

Courtesy of BMW OF NORTH AMERICA, INC.