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Service bulletin ENP-521

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 id10081042
Published by NHTSA2016-09-27
Manufacturer's numberENP-521
Manufacturer's date2016-07-08
NHTSA componentFUEL SYSTEM, OTHER

NHTSA's summary

INSTRUCTIONS FOR DEFUELING THE 26610000 BACK OF CAB FUEL SYSTEM. A PLUMBING CHANGE FROM OTHER SYSTEMS CREATES A SPECIAL DEFUELING PROCEDURE. THIS IS NOT A RECALL NOTICE OR SERVICE CAMPAIGN NOTICE. IT IS AN INSTRUCTION/REFERENCE DOCUMENT.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

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.