64 11 819 Replacing servodrive for fresh air/ram air (N52T, N55)

Necessary preliminary tasks 

• Remove RIGHT/REAR SUSPENSION CROSS-BRACE

N55 only: 

Unlock and disconnect all plug connections.

Unlatch connector housing (1 and 2) from guide of auxiliary E-box (3).

Fig 1: Identifying Connector Housing From Guide Of Auxiliary E-Box

Courtesy of BMW OF NORTH AMERICA, INC.

N55 only: 

Release screw (1).

Carefully unlock retaining hooks (2) and lift additional electronics box (3) upward while simultaneously pulling it forward.

Installation note: 

Ensure guide lug (2) sit correctly in the respective recesses of the fan housing.

Fig 2: Identifying Retaining Hook, Guide Lug And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug connection (1) on AUC sensor and disconnect.

Fig 3: Identifying Plug Connection On AUC Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) on blower housing cover (2).

Lift out blower housing cover.

Fig 4: Identifying Screws On Blower Housing Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Remove actuator drive (2).

Unfasten plug connection (3) and disconnect.

Fig 5: Identifying Actuator Drive, Plug Connection And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

Servomotors must be re-addressed in the event of replacement!

Addressing can only be carried out with the BMW diagnosis system.

Service functions:

• Body
• Heating and air conditioning function
• Flap motors
• Readdress flap motors