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Service bulletin TSB 031

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 id10144178
Published by NHTSA2018-09-04
Manufacturer's numberTSB 031
Manufacturer's date2018-07-10
NHTSA componentSTRUCTURE:FRAME AND MEMBERS

NHTSA's summary

accelerated wear and corrosion at the interface between the container front sill and the chassis rail have been observed. This accelerated wear can result in weakening of the front of the container and a settling of the container on the chassis In certain chassis manufacturer?s products, if this condition is not addressed, the container may wear to the point that it could interfere with the glad hand bulkhead fittings resulting in an air leak

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 TANK

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