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Service bulletin KSB-210122

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 id10187511
Published by NHTSA2021-02-24
Manufacturer's numberKSB-210122
Manufacturer's date2021-02-19
NHTSA componentEQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; STRUCTURE

NHTSA's summary

This is the repair instructions for KSB-210122 (first and second versions sent to dealers). It has been determined the units in this KSB population may develop sidewall cracks at both front slideouts. Only units that develop a crack will require this repair, if the sidewall is not cracked, no repair is needed.

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, Equipment and accessories

Vehicles listed
KEYSTONE MONTANA2020 to 2021

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