Glossary · UNECE / Type Approval
Also known as: Over-the-air update
OTA Update: Over-the-air software update delivered to a vehicle ECU after manufacture. An OTA update is software delivered remotely (typically over cellular or Wi-Fi) to one or more ECUs in a deployed vehicle.
Where this matters: Automotive Cybersecurity Engineering
UNECE R156, R155, and AIS 189/190 require update authenticity, integrity, rollback, and recording — and the update must respect the vehicle's RXSWIN configuration where applicable.
Related terms
A Software Update Management System (SUMS) is the certified process framework for planning, protecting, delivering, and recording vehicle software updates.
Authenticated and integrity-checked update of ECU firmware.
Regulation X Software Identification Number — identifier for the software set covered by a UN regulation type approval.
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