Tire Pressure Sensor Replacement (TPMS) Set of 4 - For 2006-2008 Porsche 911 Fitment guaranteed for: 2006-2008 Porsche 911 433MHz Frequency Sensor DEALER AND TIRE SHOP APPROVED PRODUCTS (This is why we are better) Pre-Programmed to your vehicle with exactly the same procedure your factory sensors would use Each TPMS is Manufactured to meet our stringent quality control standards.