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Service bulletin TSB-027

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 id10131592
Published by NHTSA2018-04-02
Manufacturer's numberTSB-027
Manufacturer's date2017-11-17
NHTSA componentSTRUCTURE:BODY:ROOF AND PILLARS

NHTSA's summary

customers had been reporting the loss of random roof panel retaining fasteners. After looking into this issue Quantum initiated an upgrade for the U-Nut used in this joint, the new U-Nut uses an interference fit to inhibit loosening and loss of fasteners

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

Body and frame

Vehicles listed
QUANTUM FUEL SYSTEMS LLC. CNG FUEL SYSTEM

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