# Service bulletin B640919

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: 10166389
- Published by NHTSA: 2019\-10\-21
- Manufacturer's number: B640919
- Manufacturer's date: 2019\-09\-01
- NHTSA component: EQUIPMENT; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS

## NHTSA's summary

SERVICE ACTION: CHECKING HEATER HOSE FOR PROPER INSTALLATION: The installation area between the heater return hose and the drive belt is very limited. If the hose is not secured properly this could cause contact with the drive belt. Limited space between the heater hose and the drive belt along with possible incorrect clip installation.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10166389-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10166389-9999.pdf)

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

## Components

Engine, Equipment and accessories, Cooling system

## Vehicles listed

- 2020 BMW X3
- 2020 BMW X4

JSON: [/v1/bulletins/10166389](/v1/bulletins/10166389)

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