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Service bulletin ENP-501

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 id10110251
Published by NHTSA2017-08-04
Manufacturer's numberENP-501
Manufacturer's date2017-03-29
NHTSA componentFUEL SYSTEM, OTHER; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

Agility Fuel Solutions installs UV-protected plastic caps over the ends of all pressure relief device (PRD) vent lines to prevent moisture and debris from entering and causing damage to the PRD body. These PRD vent caps feature heat activated adhesive which prevents loss from tree branch strikes, pressure washing, etc. The caps are red to help increase visibility for inspection.

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.