51 71... Removing and installing/replacing engine compartment protective features (security)

Armor plating (1) stuck into left/right in FRESH-AIR DUCT (illustration on left).

When replacing fresh-air duct: 

Stick in armor plating (1).

Fig 1: Identifying Armor Plating

Courtesy of BMW OF NORTH AMERICA, INC.

Armor plating (1)  stuck into left/right MICROFILTER air duct.

When replacing air duct: 

Stick in armor plating (1).

Fig 2: Locating Microfilter In Armor Plating

Courtesy of BMW OF NORTH AMERICA, INC.

Protective mat (1) stuck into left MICROFILTER HOUSING LOWER SECTION .

Fig 3: Identifying Protective Mat

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing left microfilter housing lower section: 

Bonding position, protective mat (1):

Place protective mat (1) on brake fluid expansion tank. Coat upper side of protective mat with window glass adhesive. Place left microfilter housing lower section in installation position, remove again and press protective mat down firmly in this position without slipping.

Fig 4: Locating Protective Mat

Courtesy of BMW OF NORTH AMERICA, INC.

Protective feature, top left wheel arch and top left bulkhead:

Protective mat (1) bonded to top left wheel arch. Protective mat (2) bonded to top left bulkhead.

Fig 5: Locating Bonding Points Of Protective Mat

Courtesy of BMW OF NORTH AMERICA, INC.

Protective feature CONTROL UNIT (DME):

Protective mat (1) inserted between right suspension strut dome (4) and electronics box control unit (3) and bonded to suspension strut dome. Protective mat (2) inserted between electronics box control unit housing (3) and wheel arch and bonded to wheel arch.

Fig 6: Locating Protective Mats

Courtesy of BMW OF NORTH AMERICA, INC.

Armor plating is installed above original cover and secured with original bolts (1).

Fig 7: locating bolts

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Protective mat (1) is only bonded in area (3) with armor plating (2).

Fig 8: Locating Bonding Points Of Protective Mat

Courtesy of BMW OF NORTH AMERICA, INC.