Ideal adjustment, pretension

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Pretension can be checked with or without window cavity cover strip. Pretension is 1.0 mm less with window cavity cover strip. Magnet in special tool 51 0 341 creates the correct door window glass pretension on the seal system for measurement. No force must be exerted on the door or door window glass during measurement.

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

Fig 1: Identifying Magnet In Special Tool 51 0 341 On Seal System

Courtesy of BMW OF NORTH AMERICA, INC.

Slide special tool 51 0 342 at distance (B) to door window glass side edge into seal (1) and measure dimension (A) to outside edge of door window glass (2).

Dimension (A) with window cavity cover strip:

A = 52 1 mm

Dimension (A) without window cavity cover strip:

A = 53 ±1 mm

B = 10 mm

Fig 2: Measuring Dimension To Outside Edge Of Door Window Glass

Courtesy of BMW OF NORTH AMERICA, INC.