Installing knock sensor of cylinders 1 to 3

• Clean the contact surface of the knock sensor at the crankcase.
• Position knock sensor (2)  .
• Connect connectors (1)  and lock.

  The connector (1)  must engage audibly.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Insert and install the knock sensor (2)  .
• Tighten down screw (1)  .

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to INSTALLING THE ALTERNATOR .
• Refer to INSTALLING THE DRIVE BELT FOR ALTERNATOR .
• Refer to INSTALLING THE THROTTLE BODY .
• Refer to INSTALLING THE ENGINE CONTROL UNIT COVER .
• Refer to INSTALLING CHARGE AIR LINE .
• Refer to INSTALLING THE CLEAN AIR PIPE AND THE RESONATOR .
• Refer to INSTALLING THE INTAKE FILTER HOUSING (TENSION STRUT REMOVED ON SHOCK TOWER) .
• Refer to INSTALLING FAN COWL .
• Refer to INSTALLING FRONT UNDERBODY PROTECTION .
• Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
• Refer to INSTALLING TENSION STRUT ON LEFT AND RIGHT SHOCK TOWER .
• Refer to INSTALLING UPPER CROSS CONNECTION .
• Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT AT TOP LEFT AND RIGHT .
• Refer to INSTALLING ACOUSTIC COVER .
• Refer to DISCONNECTING ALL BATTERY GROUND LEADS .