51 21 370 Removing and Installing/Replacing Cover (Seal) On Front Door At Bottom Left or Right

Detach cover (1) in direction of arrow from front door (2).

Installation: 

Begin by clipping in at rear (B-pillar) (risk of damage).

Clip clips of cover (1) correctly into bores (3).

Fig 1: Identifying Clips Of Cover (1 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Clips (1) of cover (2) must not be damaged.

Cover (2) has an aluminum insert (3).

Only press on clips (1) when installing otherwise cover (2) will become uneven.

Fig 2: Identifying Clips Of Cover (2 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.