Genuine OEM BMW Exhaust Temperature Sensor, part number 13628490633. This sensor measures exhaust gas temperature, providing critical data to the engine control unit for optimal performance and emissions management. It is typically located in the exhaust system before or after the catalytic converter. The sensor is constructed from durable materials designed to withstand high temperatures and harsh exhaust gases. Genuine OEM parts ensure precise calibration and long-lasting durability, maintaining the integrity of your vehicle's emissions control system.