64 11 225 Replacing controller for heating and A/C system blower

Necessary preliminary tasks: 

• Remove blower housing for heating and air-conditioning unit  . See 64 11 545 REMOVING AND INSTALLING BLOWER HOUSING FOR HEATING AND AIR-CONDITIONING UNIT  or 64 11 545 REMOVING AND INSTALLING FAN HOUSING FOR HEATER/AIR CONDITIONER (N52T, N55) 

Unlock plug connections (1) and disconnect.

Release screws (3).

Remove controller (2) towards top.

Fig 1: Identifying Controller Plug Connections And Screws

Courtesy of BMW OF NORTH AMERICA, INC.