This is a genuine Mercedes-Benz tire pressure monitoring sensor, part number A0009050030. It is made from ABS plastic and metal and operates on a frequency of 433 MHz. The sensor is a direct fit and easy to install, requiring no programming. It is suitable for use on the front, rear, left, and right of your vehicle. Please note that this item comes with a 3-month manufacturer warranty. Buy with confidence from an eBay Motors seller with a positive feedback rating.