11 74 509 Replacing Both Pressure Converters for Turbocharger (N63)

Necessary Preliminary Tasks: 

• Partially Release Charge Air Cooler EXPANSION TANK .
• Partially Release AUXILIARY WATER PUMP  for Exhaust Turbocharger (Not F04).
• Disconnect Plug Connection At COOLANT THERMOSTAT .

Pressure Converter, Cylinders 1-4 

Disconnect Plug Connection (1) On Pressure Converter.

Installation Note: 

Plug Connection (1) Must Snap Audibly Into Place!

Disconnect Black Vacuum Hose At Connection (VAC = Vacuum Reservoir).

Disconnect Black/Red Vacuum Hose At Connection (Out = Turbocharger Vacuum Unit).

Unscrew Nuts (2).

Tightening torque 11 65 8AZ .

Remove Pressure Converter.

Fig 1: Identifying Connector On Pressure Converter, Nuts, and VAC / Out Hose Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Pressure Converter, Cylinders 5-8 

Disconnect Plug Connection (1) On Pressure Converter.

Installation Note: 

Plug Connection (1) Must Snap Audibly Into Place!

Disconnect Black Vacuum Hose At Connection (VAC = Vacuum Reservoir).

Disconnect Black/Blue Vacuum Hose At Connection (Out = Turbocharger Vacuum Unit).

Unscrew Nuts (2).

Tightening torque 11 65 8AZ .

Remove Pressure Converter.

Fig 2: Identifying VAC and Out Connections, Connector On Pressure Sensor, and Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Check Activation Via BMW Diagnosis System.