Necessary preliminary work

Remove charge air cooler EXPANSION TANK

Unclip coolant hose (1) from bracket (3) and lay in direction of arrow to one side.

Unfasten screws (2).

Tightening torque 11 51 4AZ .

Fig 1: Identifying Coolant Hose And Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
Coolant emerges when the coolant hoses are detached from the auxiliary water pump (3).
Cover surrounding components and plug connections with suitable apparatus

Release hose clamp (5) with a suitable tool.

Installation note:

Fig 2: Identifying Auxiliary Water Pump, Coolant Hose And Hose Clamp

Courtesy of BMW OF NORTH AMERICA, INC.