Ideal setting, preload

NOTE: Pre-tension can be checked with or without weather strip. Pre-tension is 1.0 mm less with weather strip.

Insert the special tool 51 0 341 in the rotary striker of the door lock and close the rotary striker manually.

Close the door carefully up to the point where the special tool 51 0 341 magnetically adheres to the striker (= defined door opening angle for measurement).

No force must be exerted on the door or door window glass during measurement.

Fig 1: Inserting Special Tool (51 0 341) To Door Lock Rotary Striker

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The special tool 51 0 342 must contact the sheet metal flange

Slide special tool 51 0 342 at distance (B) of door window glass lateral edge into seal (1). Measure dimension (A) to door window glass (2). Dimension (A) with weather strip: A = 51 ±1 mm

Dimension (A) without weather strip:

= 52 ±1 mm
= 30 mm

Fig 2: Sliding Special Tool (51 0 342) On Door Window Glass
Courtesy of BMW OF NORTH AMERICA, INC.