Release notes: over-the-air: service action software update for warning lights (SA621)
Kia technical service bulletin OTA_SA621 for 2025 Kia K4.
- Bulletin number
- OTA_SA621 (SA621)
- Component
- Engine
- Summary
- RELEASE NOTES: OVER-THE-AIR: SERVICE ACTION SOFTWARE UPDATE FOR WARNING LIGHTS (SA621) - This Over-the-Air (OTA) software update is designed to update the Engine Control Unit (ECU) logic of certain 2025 K4 vehicles. This update improves the processing logic of the Engine Control Unit (ECU) to reduce the unintended display of warning lights.
Owners of these vehicles have filed 10 complaints in the engine category.
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