12 12 011 Replacing all spark plugs (N42, N40, N46, N45, N52, N52K, N51)

Special tools required: 

• 12 1 171  .
• 12 1 200

Necessary preliminary tasks: 

• Switch off ignition
• Remove IGNITION COILS 

Unscrew spark plugs with special tool 12 1 171  .

Fig 1: Identifying Special Tool (12 1 171) And (12 1 200)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Tighten down spark plugs with special tool 12 1 171  and special tool 12 1 200  (torque limiter).

Without special tool 12 1 200  , observe tightening torque. Tightening torque, 12 12 1AZ .