64 12 577 Replacing changeover valve for independent/auxiliary heating unit

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Risk of scalding!
Only perform the following repair work on an engine that has cooled down.
Follow instructions for repair work on cooling system. Refer to procedures for applicable engine in COOLANT, CHECKING COOLING SYSTEM .

Necessary preliminary work:

COMPLETELY REMOVE THE INDEPENDENT HEATER .

IMPORTANT: Risk of damage!
Observe marked coolant flow direction.

NOTE: Mark position of coolant hoses prior to dismantling.

Release spring clamps (1) and detach coolant hoses.

Fig 1: Identifying Spring Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unfasten screws (2).

Remove changeover valve for independent/auxiliary heating unit (3).

Fig 2: Identifying Independent/Auxiliary Heating Unit, Plug Connection And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Top up coolant and vent cooling system. Refer to procedures for applicable engine in COOLANT, CHECKING COOLING SYSTEM .