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Service bulletin SIS-21828

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 id10038973
Published by NHTSA2011-06-29
Manufacturer's numberSIS-21828
Manufacturer's date2011-04-01
NHTSA componentSTEERING:ELECTRIC POWER ASSIST SYSTEM; STEERING; STEERING:HYDRAULIC POWER ASSIST SYSTEM

NHTSA's summary

FORD: THERE MAY BE HIGH STEERING EFFORT OR LACK OF ASSIST. *RM

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

Steering, Power steering

Vehicles listed
FORD E SERIES
FORD EXPEDITION2011
FORD F-1502011
FORD F-250 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-350 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-450 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD2011 (the catalog's model; the bulletin names a series or trim of it)
LINCOLN NAVIGATOR2011

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

Other bulletins for the same vehicles and component
TSB-11-8-182011-11-17. Service bulletin. FORD: WHEN MAKING LEFT HAND TURNS, THE STEERING WHEEL LACKS RETURN ABILITY TO CENTER LOCATION. THE ISSUE IS INTERMITTENT. *PE
TSB-11-8-142011-11-17. Service bulletin. FORD: WHEN MAKING EITHER LEFT OR RIGHT TURNS, THERE IS A LACK OF STEERING ASSIST OR AN EXCESSIVE STEERING EFFORT INVOLVED. *PE