NGK Audi A4 1999-1997 Direct Fit Oxygen Sensor

The advanced ceramic element in this NGK oxygen sensor is built with a 3-stage plasma jet and deposit trap overcoat. This design helps protect the sensor from contaminants that can poison the element, which is crucial for maintaining optimal engine performance. As a key part of your vehicle's on-board diagnostic system, this sensor provides constant feedback to the ECU, helping to control the air-fuel ratio, maximize fuel efficiency, and reduce harmful emissions. It also alerts the OBDII system to potential issues with fuel delivery or the catalytic converter.

NGK, a major OEM supplier, uses state-of-the-art technology to control their ceramic elements from raw material to the finished product. This focus ensures that the sensor is well-built and ready to perform. This direct-fit sensor is designed to work with a range of vehicles, including many Audi A4, A6, and A8 models, as well as Volkswagen Golf, Jetta, Passat, and EuroVan models from the mid-90s to the early 2000s. Trust the sensor specialists at NGK for reliable OE application technology.