Application: 1997 2000 BMW 528i and other models are listed below for reference. Part numbers include 64116923204, 64116929486, 64118385549, 64118364173. Function and benefits Blower motor resistor that regulates the speed of your vehicle's HVAC system fan, delivering the correct airflow for cooling or heating. Designed for smooth, reliable operation to improve cabin comfort. Helps maintain stable airflow, contributing to more effective heating and cooling and consistent cabin temperatures in various conditions. Built to support longterm HVAC performance, reducing the likelihood of fluctuating fan speeds and intermittent operation. Key attributes Compatibility: Listed for 1997 2000 528i with additional models shown in the product details; Part numbers 64116923204, 64116929486, 64118385549, 64118364173. Material and durability: Constructed from quality materials to withstand heat and wear, supporting lasting performance in the vehicle's HVAC system. Performance: Enables smooth adjustment of fan speeds to achieve the desired climate conditions inside the cabin. Use scenarios Scenario 1: Replacing a failing blower resistor to restore full range of fan speeds (low to ) for reliable cabin comfort in both hot and cold weather. Scenario 2: Maintaining consistent airflow to support effective heating and cooling, ensuring stable cabin temperatures during seasonal changes. Scenario 3: Installing as part of a longterm HVAC maintenance plan to keep the climate control system responsive and functional in aging vehicles. Notes See the product listing for additional compatible models and complete model coverage. Part numbers are provided for reference and ordering.