Hyundai Sonata 1991 — technical service bulletin
Bulletin 9401015 · NHTSA communication 37965 · issued Dec 1, 1994
Technical service bulletin
communication type
Engine and Engine Cooling
component
1991
model years
1
vehicle entries
Official summary
1991 california specification sonata catalytic converter emission campaign (23). *tw
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.