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Service bulletin BS3891E

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10110003
Published by NHTSA2017-08-03
Manufacturer's numberBS3891E
Manufacturer's date2017-02-13
NHTSA componentELECTRICAL SYSTEM; ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

NHTSA's summary

When the accelerator is suddenly depressed, the alternator voltage momentarily surge well above 32V because the voltage regulator response time is too long.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Alternator

Vehicles listed
NOVA BUS LFS2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
FT4558R12019-09-16. Service bulletin. Niehoff alternator regulator connections failing off
BS3919E2017-08-03. Service bulletin. When the accelerator is suddenly depressed, the alternator voltage momentarily surge well above 32V because the voltage regulator response time is too long.
BS3270E2016-11-04. Service bulletin. UNABLE TO PERFORM STATIONARY REGENERATION.