BMW Nitrogen Oxide Sensor 5WK9 6699B for E90 E91 F10 F11

This is a BMW OEM Nitrogen Oxide Sensor, part number 5WK9 6699B (also 5WK96699B, 857647101). It fits BMW E90, E91, F10, F11, F30, F25 X3, E70, and F15 X5 models. This automotive NOx sensor is designed for easy installation and can be directly replaced. It's pre-tested and accurate, helping to improve fuel economy and reduce harmful emissions. It ensures your engine runs efficiently with a proper air-fuel ratio and improves engine response. Made of high-quality materials, this sensor is durable and built to last, maintaining consistent performance even in harsh conditions. It provides accurate readings of exhaust gas oxygen levels for precise engine control and optimal fuel efficiency. This is a professional, high-quality aftermarket replacement product. Manufacturer: Continental. Country of origin: Germany.