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Service bulletin BS4275E

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 id10145265
Published by NHTSA2018-10-09
Manufacturer's numberBS4275E
Manufacturer's date2018-09-27
NHTSA componentFUEL SYSTEM, GASOLINE; FUEL SYSTEM, OTHER:FUEL FILTER

NHTSA's summary

Fitting on fuel filter hose is incompatible with the fitting on the side of the engine.

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

Fuel system, Fuel filter

Vehicles listed
NOVABUS BUS

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