# Service bulletin Circular 93H4

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: 10178449
- Published by NHTSA: 2020\-09\-03
- Manufacturer's number: Circular 93H4
- Manufacturer's date: 2020\-08\-06
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Moisture may enter the high\-voltage battery due to corrosion creep at the battery regulation control unit and at the low\-voltage connector. If moisture has entered, a warning will appear on the instrument cluster display to alert the driver.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178449-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178449-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2017 to 2018 AUDI A3 SPORTBACK E\-TRON

JSON: [/v1/bulletins/10178449](/v1/bulletins/10178449)

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