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Service bulletin ENP-516

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 id10185887
Published by NHTSA2021-01-25
Manufacturer's numberENP-516
Manufacturer's date2020-12-10
NHTSA componentFUEL SYSTEM, GASOLINE; EQUIPMENT

NHTSA's summary

This manual replaces three individual manuals: ?Truck and Tractor CNG System Operation Manual, ENP-007; ?CNG Fuel System Inspection Guidelines,? ENP-468 and ?CNG Maintenance Interval Guidelines,? ENP-493. The simplified ?CNG System Users? Manual,? ENP-314, is available for download from the Agility Fuel Solutions LLC (Agility®) website. This manual contains general operation, maintenance and inspection information for Agility® compressed natural gas (CNG) vehicle fuel systems. If an original equipment manufacturer (OEM) fuel system manual exists, it shall take precedence over this manual. Systems or specific components may vary slightly from this text, but the operating principles and functions of the components are the same.

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

Equipment and accessories, Fuel system

Vehicles listed
AGILITY FUEL SYSTEMS CNG FUEL SYSTEM

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