12 12 011 Replacing all spark plugs (N53, N54, N63)

Special tools required: 

• 12 1 220  , see 12 1 220 SPARK PLUG WRENCH WAF 14 MM BIHEXAL .
• 12 1 230  , see 12 1 230 INSTALLATION AID .

Necessary preliminary tasks: 

• Switch off ignition.
• Remove ignition coils  , see 12 13 511 Replacing ignition coils (N54, N53, N43) .

Clean spark plug slot with compressed air.

Unscrew spark plugs with special tool 12 1 220  and extension (1) with min. 8° bend.

Flexible ratchet extensions must always be used. If rigid mounting tools are used, there is a risk of insulator breakages.

Note:  Also do not use a variable plug connection with locking capability as this also poses a risk of insulator breakages.

Fig 1: Unscrewing Spark Plugs With Special Tool (12 1 220)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Attach new spark plug to special tool 12 1 230  .

Fig 2: Identifying Special Tool (12 1 230) On Spark Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Screw spark plug hand-tight with special tool 12 1 230  into cylinder head plug thread as far as it will go.

Fig 3: Screwing Spark Plug With Special Tool 12 1 230 In To Cylinder Head Plug Thread

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:  Tighten the spark plugs with a torque wrench, special tool 12 1 220 and an extension with a minimum kink of 8°. Flexible ratchet extensions must always be used. If rigid mounting tools are used, there is a risk of insulator breakages.

Fig 4: Unscrewing Spark Plugs With Special Tool (12 1 220)

Courtesy of BMW OF NORTH AMERICA, INC.

Note:  Also do not use a variable plug connection with locking capability as this also poses a risk of insulator breakages.

Observe tightening torque. Tightening torque 12 12 1AZ SPARK PLUGS .