Ford E-150 1997 — technical service bulletin
Bulletin BC0853961007 · NHTSA communication 50435 · issued Oct 7, 1996
Technical service bulletin
communication type
Electrical System
component
1997
model years
5
vehicle entries
Official summary
Airbag light on & code 21, may be caused by an electromagnetic interference generated within the electrical system. *tt
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.