Applicable to vehicles manufactured between 2004 and 2015, including the QX56 (2004-2010), meeting the installation requirements for the heating/cooling damper actuator. Corresponds to part numbers 27743-ZP00A and 604-970, and can be directly replaced. Provides the damper adjustment drive function, connecting to the vehicle's system. Assists in controlling the ratio of hot and cold , ensuring stable interior temperature. Compatible with the heating/cooling damper actuator, supporting normal operation of the system.