5-Wire Upstream Oxygen Sensor for bmw 325i N53 11787561409SPECIFICATIONS We stock oxygen sensors for most car models in the world with reasonable prices. If you can't find the parts you need in our listings, you can contact our customer service. Remember to provide your VIN number when placing an order. A VIN is a 17 character ID number that identifies your vehicle. Usually in the corner of the front and rear window glass, or the vehicle structure (often the firewall). 11787561409 5 Wire Upstream Oxygen