OTA update
Over-the-air delivery of software to vehicles in the field — from map data to feature releases to safety recalls fixed in software.
An OTA (over-the-air) update delivers software to a vehicle wirelessly, without a workshop visit. The scope ranges from map and infotainment content, through feature additions and performance changes, to safety-relevant fixes — including recalls remedied entirely in software.
Technically, OTA capability depends on more than a modem: vehicles need updatable software partitions, fail-safe rollback (an update must never leave a car undrivable), sufficient central compute headroom, and an update pipeline that can prove which software version each vehicle runs.
Regulation moved early here. UNECE R156 requires manufacturers to operate a certified software update management system and to demonstrate that updates do not invalidate the vehicle’s type approval. The commercial stakes are equally large: OTA is the delivery channel for feature-on-demand revenue, and field data shows software recalls resolving in days rather than the months a hardware campaign takes.
Related: Software-defined vehicle (SDV) · Type approval / homologation · UNECE R156 · Vehicle OS