# Service bulletin B611808

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: 10152311
- Published by NHTSA: 2018\-12\-17
- Manufacturer's number: B611808
- Manufacturer's date: 2015\-04\-01
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Battery Maintenance Requirements: Battery Care. Proper battery maintenance is vital when BMW vehicles are in your center's inventory. Allowing a vehicle's battery voltage to drop below 12.0 volts \(12.0V\) permanently reduces the battery life expectancy and can lead to premature failure of the battery. For vehicles, equipped with a high\-voltage battery \(hybrid/electric vehicles\), failure to properly maintain this battery may lead to a greatly discharged HV battery, requiring replacement. We provide a flexible battery maintenance system every BMW center can use in accordance with their particular needs. This bulletin explains the Battery Charging Calendar \(see attachment\), charging systems and a simplified tool and battery voltage checking procedure below.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10152311-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10152311-0001.pdf)

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

## Components

Electrical system

## Vehicles listed

- BMW K SERIES

JSON: [/v1/bulletins/10152311](/v1/bulletins/10152311)

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