Removing the catalytic converter for cylinders 1 to 4

Preliminary work 

• Refer to REMOVING THE LEFT AND RIGHT UNDERSHIELD (TANK COVER) .
• Refer to REMOVING THE REAR LEFT AND RIGHT TENSIONING STRUT .
• Refer to REMOVING THE LEFT AND RIGHT REAR DIFFUSER .
• Refer to REMOVING THE STIFFENING PLATE .
• Refer to REMOVING EXHAUST SYSTEM .
• Refer to REMOVING THE ACOUSTIC COVER .
• Refer to REMOVING LEFT OXYGEN CONTROL SENSOR .
• Refer to REMOVING RIGHT OXYGEN CONTROL SENSOR .
• Refer to REMOVING SUSPENSION STRUT BRACE .
• Refer to REMOVING RIGHT SUSPENSION STRUT BRACE .
• Refer to REMOVING INTAKE SILENCER HOUSING .
• Refer to REMOVING THE RIGHT TENSION STRUT ON THE SHOCK TOWER .
• Refer to REMOVING COVER FOR THE RIGHT DME CONTROL UNIT .
• Refer to REMOVING THE RIGHT UNFILTERED-AIR DUCT .
• Refer to REMOVING THE RIGHT OXYGEN SENSOR MONITOR .
• Refer to RELEASING THE HEAT PROTECTION WIRE RING OF THE LEFT OXYGEN SENSOR MONITOR .
• Refer to REMOVING THE RIGHT-HAND ENGINE VENTILATION LINE AND THE CRANKCASE VENTILATION INTAKE PIPE .
• Refer to REMOVING THE LEFT ENGINE VENTILATION LINE .
• Refer to REMOVING UPPER HEAT SHIELD .
• Refer to RELEASING SCREW BETWEEN THE LEFT AND RIGHT HEAT SHIELD .
• Refer to REMOVING THE LEFT HEAT SHIELD .
• Refer to REMOVING RIGHT HEAT SHIELD .

• Loosen circlip (1)  and remove.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Loosen screws (1)  .
• Loosen screws (2)  .
• Loosen screw (3)  .
• Remove holder (4)  .

  Courtesy of BMW OF NORTH AMERICA, INC.

• Lift the catalytic converter for the cylinders 1 to 4 (1)  to the top.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Screw out and remove the catalytic converter for the cylinders 1 to 4 (1)  .

  Courtesy of BMW OF NORTH AMERICA, INC.