# Service bulletin B611521

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: 10205094
- Published by NHTSA: 2021\-12\-20
- Manufacturer's number: B611521
- Manufacturer's date: 2021\-11\-01
- NHTSA component: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

It is possible that the EPP \(expanded polypropylene\) insert for the lithium\-ion battery was not installed in approx. 0.3% of the G82 and G83 vehicles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205094-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10205094-9999.pdf)

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

## Components

Electrical system, Equipment and accessories, 12\-volt battery

## Vehicles listed

- 2021 BMW M4

JSON: [/v1/bulletins/10205094](/v1/bulletins/10205094)

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