Blower Motor Resistor – 4Pin Connector, 4 Mounting Holes, Manual Air Conditioner Compatible Key Features and Benefits: Designed for manual air conditioners; not suitable for automatic air conditioners or electronic dual zone ATC systems 4pin connector and 4 mounting holes for secure and reliable installation OEM fitment replacement for part numbers 3F2Z18591AA and YH1715, ensuring precise compatibility and performance Adjusts blower motor fan speed to control air volume in your vehicle's HVAC system Enhances blower efficiency and stability, protecting downstream components from damage Simple installation with basic tools – remove old screws, detach the old resistor, and install the part in minutes Performance and Function: This blower motor resistor is engineered to deliver accurate fan speed adjustments, allowing you to finely tune airflow for heating, cooling, or ventilation. By maintaining blower operation, it helps extend the lifespan of connected HVAC components and ensures consistent comfort inside your vehicle. Specifications: Connector Type: 4pin Mounting: 4 holes for secure fit Application: Manual air conditioning systems only OEM Replacement: 3F2Z18591AA, YH1715 Use Scenarios: 1. a faulty blower motor resistor causing loss of certain fan speeds in your manual AC system. 2. Restore proper climate control in your vehicle for efficient cabin heating and cooling during seasonal changes. 3. Upgrade an aging resistor with a durable OEMfit part to prevent HVAC system strain and maintain consistent airflow. With straightforward installation and exact OEM compatibility, this blower motor resistor provides a dependable, costeffective solution for maintaining your vehicle's interior comfort and HVAC performance.