Kia Optima 2019–2020 — technical service bulletin
Bulletin SC367_TSB · NHTSA communication 11037393 · issued Sep 10, 2026
Technical service bulletin
communication type
Electrical System
component
2019–2020
model years
2
vehicle entries
Official summary
TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: This bulletin provides information to upgrade the Electronic Control Module ‘ECM’ system software for certain 2019-2020 MY Optima vehicles manufactured from May 21, 2018, through June 1, 2020, equipped with the 1.6L T-GDI engine to ensure compliance with emissions. Kia has become aware that the subject vehicles may have been produced with engine calibrations that can cause the vehicle to release air pollutants that exceed Federal and California standards. These standards were established to protect the public’s health and welfar
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.