# Service bulletin B640125

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: 11014665
- Published by NHTSA: 2025\-03\-03
- Manufacturer's number: B640125
- Manufacturer's date: 2025\-02\-28
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

The customer may hear an intermittent “humming” or “foghorn” type sound in vehicle. It sounds like a lowhum that last for only a few seconds. This can occur with the engine operating or may be heard for up to one hour after engine shut down.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014665-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014665-9999.pdf)

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

## Vehicles listed

- 2024 BMW 330I
- 2024 BMW X3
- 2024 BMW X4
- 2023 BMW Z4

JSON: [/v1/bulletins/11014665](/v1/bulletins/11014665)

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