# Service bulletin B510621

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10190851
- Published by NHTSA: 2021\-04\-26
- Manufacturer's number: B510621
- Manufacturer's date: 2021\-03\-01
- NHTSA component: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS

## NHTSA's summary

STREAKS ON FRONT SIDE WINDOWS: Streak marks are visible, most commonly on the upper rear corner of the front side window. The marks can be present anywhere on the rearmost edge of either front window.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190851-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10190851-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Glass, wipers and mirrors, Power windows

## Vehicles listed

- 2021 BMW 430I
- 2021 BMW M4
- 2021 BMW M440I

## Other bulletins for the same vehicles and component

- [B510819](/bulletins/10249437.md), 2024-02-01, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS; ELECTRICAL SYSTEM. The basic conditions for initializing the power windows are not met.
- [B510923](/bulletins/10238078.md), 2023-06-26, Service bulletin: VISIBILITY:POWER WINDOW DEVICES AND CONTROLS. Sudden failure of the power window\(s\).

JSON: [/v1/bulletins/10190851](/v1/bulletins/10190851)

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