The 15727 Bosch Universal Oxygen Sensor is designed to fit BMW, Mercedes-Benz, and VW vehicles. It is a 4-wire sensor that is OE Spec and comes with a 30-day warranty. This sensor is a universal fitment and features easy installation, making it a convenient option for replacing your old oxygen sensor. The manufacturer part number is 15738, and it can interchange with other part numbers such as 234-4000 and 234-4209 from Denso. The sensor type is universal 4-wire oxygen sensor, and the connector type is universal, requiring the use of your old sensor plug.