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Service bulletin SB-21

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 id10026734
Published by NHTSA2008-12-10
Manufacturer's numberSB-21
Manufacturer's date2008-03-18
NHTSA componentEQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:RECREATIONAL VEHICLE/TRAILER

NHTSA's summary

TIFFIN MOTORHOMES SERVICE CAMPAIGN: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. SWITCH BOX GROUNDING LUG. THE TAP SCREW IS NOT TIGHT ENOUGH. THIS COULD CAUSE PROBLEMS AT THE LOAD CENTER CAUSING A LOSS OF GROUND. CSC LETTER WAS RECEIVED. *PE

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

Equipment and accessories, Labels and manuals

Vehicles listed
TIFFIN ALLEGRO1979 to 1980
TIFFIN ALLEGRO1983
TIFFIN ALLEGRO1985 to 1986
TIFFIN ALLEGRO1988
TIFFIN ALLEGRO1990 to 2008
TIFFIN ALLEGRO BAY1998 to 2008
TIFFIN ALLEGRO BUS1998 to 2008
TIFFIN BAY2000 to 2001
TIFFIN BAY2004 to 2005
TIFFIN BUS2000 to 2001
TIFFIN BUS2004 to 2005
TIFFIN PHAETON2000 to 2008
TIFFIN TIFFIN
TIFFIN TIFFIN1984 to 1988
TIFFIN TIFFIN2000 to 2003
TIFFIN TRAVEL TRAILER1999 to 2000
TIFFIN ZEPHYR1999 to 2003
TIFFIN ZEPHYR2005 to 2008

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