- This OEM HVAC Heater Servomotor A/C is a perfect fit for Porsche Cayenne 9Y Panamera 971 models. It is designed to ensure your comfort while driving, without compromising on performance. With its high-quality construction and advanced technology, this HVAC Heater Servomotor A/C is a reliable and efficient choice. It is easy to install and operates smoothly, making it an ideal addition to your car. Get this OEM part number: PAB82051101 and enjoy a comfortable ride all year round.