Adjust the preload of the door window glass
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Schematic diagram is for example purposes. Some parts may differ in certain details.
- Open the door, if necessary move the door window glass to the top-most position.
- Insert special tool 5 A45 BD8 with special tool 5 A4A 389 into the rotary striker of the door lock and manually lock the rotary striker (door window glass moves all the way up).
- Close the door carefully until the special tool 5 A4A 389 is on the striker (defined opening angle for the
measurement).
- Do not exert any force on the door or the door window glass during measurement.
- Bring the special tool 0 496 456 (51 0 342)
into position on the seal (1) and the door window glass (2).
Fit the special tool 0 496 456 (51 0 342) about 3.5 cm forwards from the corner of the door window glass.
- Determine the dimension for the preload between the seal (1) and the outer edge of the door window glass (2).
Nominal dimension = 60 ± 1 mm
- Open door and remove the sealing cap on door frame.
- Feed in the special tool 2 351 398 into the door and fix on the nut (1) and the guide (2).
- Loosen the nut (1) with the knob (3).
- Set the preload by turning at the lever (4).
Nominal dimension = 60 ± 1 mm
- Tighten nut (1).
- Check setting (see further information) and repeat process if necessary.
Check the door window glass setting