1174... Vacuum system arrangement (M57T2TOP_SCR)

1. Retaining clip on clean air pipe.
2. Hose clip on bracket for clean air pipe.
3. Connecting piece, red vacuum pipe to impeller bypass.
   Fig 1: Identifying Air Pipe Clip, Bracket And Vacuum Pipe

   Courtesy of BMW OF NORTH AMERICA, INC.

1. Heat shielding foil directly above high-pressure turbocharger.
2. Loose hose clip.
3. Connection, wastegate valve blue vacuum pipe to connecting piece.
4. Connection, wastegate valve from connecting piece, black vacuum pipe.
   IMPORTANT: Black vacuum pipe must be high-temperature resistant.
   Fig 2: Identifying High-Pressure Turbocharger, Hose Clip, Wastegate Valve Blue Vacuum Pipe And Vacuum Pipe

   Courtesy of BMW OF NORTH AMERICA, INC.

EURO vehicles 

1. EGR valve, blue vacuum pipe to pressure converter.
2. Vacuum adjuster for swirl flaps.
3. Electric changeover valve for swirl flaps, white vacuum pipe.
4. Electric changeover valve for hydraulic mountings (engine).
5. Pressure converter, blue vacuum pipe (1).
6. Connection for hydraulic mounting (engine), red vacuum pipe.
7. Connector, black vacuum pipe to (3) electric changeover valve for swirl flaps.
8. Connector, black vacuum pipe to electric changeover valve (4) for hydraulic mountings (engine).
9. Connector, black vacuum pipe to (5) pressure converter.
10. Connector, black vacuum pipe to vacuum accumulator.
11. Connector, black vacuum pipe to pressure converter for wastegate valve.
    Fig 3: Identifying Changeover Valve, Hydraulic Mounting And Vacuum Pipe

    Courtesy of BMW OF NORTH AMERICA, INC.

US vehicles 

1. Not fitted.
2. Not fitted.
3. Not fitted.
4. Electric changeover valve for hydraulic mountings (engine).
5. Not fitted.
6. Connection for hydraulic mounting (engine) red vacuum pipe.
7. Not fitted.
8. Connector, black vacuum pipe to electric changeover valve (4) for hydraulic mountings (engine).
9. Not fitted.
10. Connector, black vacuum pipe to vacuum accumulator.
11. Connector, black vacuum pipe to pressure converter for wastegate valve.
    Fig 4: Identifying Changeover Valve, Hydraulic Mounting And Vacuum Pipe

    Courtesy of BMW OF NORTH AMERICA, INC.

1. Black supply line to vacuum distributor (master VAC)
2. Vacuum accumulator to T-joint black vacuum pipe.
3. Connector on pressure converter to wastegate valve blue vacuum pipe; connector is marked with a blue spot.
4. Connector on pressure converter to turbine control flap blue vacuum pipe; connector is marked with a blue spot.
5. Connector on pressure converter for turbine control flap black vacuum pipe to vacuum accumulator T-joint.
   Fig 5: Identifying Wastegate Valve Blue Vacuum Pipe, Turbine Control Flap Blue Vacuum Pipe And Pressure Converter

   Courtesy of BMW OF NORTH AMERICA, INC.
6. Connector on pressure converter for wastegate valve black vacuum pipe to vacuum distributor (master VAC).

1. Secure vacuum pipes with a cable tie.
2. Secure vacuum pipes with a loose hose clip.
3. Secure vacuum pipes with heat shielding foil directly above high-pressure turbocharger.
   Fig 6: Identifying Vacuum Pipes Cable Tie, Hose Clip And Vacuum Pipes

   Courtesy of BMW OF NORTH AMERICA, INC.

1. Connector on pressure converter to wastegate valve blue vacuum pipe; connector is marked with a blue spot.
2. Connector on vacuum unit (turbine control flap), blue vacuum pipe.
3. Connector on pressure converter to turbine control flap blue vacuum pipe; connector is marked with a blue spot.
4. Connector on pressure converter for turbine control flap black vacuum pipe to vacuum accumulator T-joint.
5. Connector on pressure converter for wastegate valve black vacuum pipe to vacuum distributor (master VAC).
   Fig 7: Identifying Pressure Converter Connector, Vacuum Unit And Turbine Control Flap Blue Vacuum Pipe

   Courtesy of BMW OF NORTH AMERICA, INC.

1. T-joint for vacuum accumulator.
2. Electric changeover valve for impeller bypass flap
3. Connector, red vacuum pipe to impeller bypass.
4. Connector, black vacuum pipe to T-joint (vacuum accumulator).
   Fig 8: Identifying Vacuum Accumulator T-Joint, Vacuum Pipe And Vacuum Pipe T-Joint

   Courtesy of BMW OF NORTH AMERICA, INC.

1. Connector, red vacuum pipe to impeller bypass.
2. Vacuum unit, impeller bypass.
3. Retaining clip on low-pressure turbocharger for black vacuum pipe (heat resistant)
4. Connection, wastegate valve from connecting piece, black vacuum pipe.
   IMPORTANT: Black vacuum pipe must be high-temperature resistant.
5. Connection, wastegate valve blue vacuum pipe to connecting piece.
   Fig 9: Identifying Vacuum Pipe, Vacuum Unit, Impeller Bypass And Low-Pressure Turbocharger Retaining Clip

   Courtesy of BMW OF NORTH AMERICA, INC.

1. Vacuum unit, bypass exhaust flap on EGR cooler.
2. Connection, bypass exhaust flap, blue vacuum pipe.
   Fig 10: Identifying Vacuum Unit, Bypass Exhaust Flap And Blue Vacuum Pipe

   Courtesy of BMW OF NORTH AMERICA, INC.

1. T-joint, connector for black vacuum pipe to vacuum distributor.
2. Connector on electric changeover valve to vacuum unit for bypass exhaust flap, blue vacuum pipe.
3. Connector on electric changeover valve for bypass exhaust flap, black vacuum pipe.
   Fig 11: Identifying Vacuum Pipe T-Joint, Electric Changeover Valve And Electric Changeover Valve Connector

   Courtesy of BMW OF NORTH AMERICA, INC.