# Service bulletin SIL 645

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: 10122052
- Published by NHTSA: 2017\-11\-08
- Manufacturer's number: SIL 645
- Manufacturer's date: 2017\-09\-29
- NHTSA component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY

## NHTSA's summary

This service information letter \(SIL\) requires replacement of the system BMS \(Battery Management System\) for improved battery charging and reliability. Some battery modules may have had components that were not properly soldered.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10122052-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10122052-0001.pdf)

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

## Components

Electrical system, 12\-volt battery

## Vehicles listed

- ALTEC AA

JSON: [/v1/bulletins/10122052](/v1/bulletins/10122052)

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