Ford Mustang 2013 — technical service bulletin
Bulletin SFA-12L09 · NHTSA communication 10047559 · issued Oct 24, 2012
Technical service bulletin
communication type
Engine
component
2013
model years
1
vehicle entries
Official summary
Ford: factory installed spark plugs meets gap specification; if changing or installing new spark plugs, or use incorrect spark plug gap specification, this may cause detonation and/or misfire, damaging engine. Models 2013 mustang shelby gt500. *pe
Vehicles covered
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.