Function: An automotive grade actuator that powers the door locking and trunk locking drive for Kia Rio and Optima LX/EX models, years 2016 through 2020. It provides the locking action for rear doors and the trunk, enabling door and trunk locking functions from a single actuator. Compatibility: Fits 2016–2020 Kia Rio and 2016–2020 Kia Optima LX and EX. Why you need it: When trunk lock or rear door lock fails to lock or unlock reliably, this actuator restores proper operation, improving security and convenience. Key attributes: - Compact design suitable for standard Kia lock assemblies - Durable construction for repeated locking cycles - Engineered to integrate with factory wiring and connectors - Reliable actuation performance for door and trunk locking Performance: Designed for consistent actuation across typical automotive locking cycles, supporting both keyless entry and interior lock operations. Use scenarios: - Replacing a faulty trunk lock actuator to restore remote trunk release and trunk security. - Fixing a rear door locking issue on Kia Rio or Optima LX/EX 2016–2020 where the lock does not respond to the key fob or interior switch. - During mid life refurbishment of a Rio or Optima, ensuring both door and trunk locking functions operate reliably from a single actuator.