NGK Infiniti QX4 2000-1997 Direct Fit Oxygen Sensor

This NGK oxygen sensor is a direct fit for your 1997-2000 Infiniti QX4. Oxygen sensors are a key part of your vehicle's diagnostic system, working to keep the engine running smoothly, improve gas mileage, and cut down on exhaust emissions. It sends constant information to your car's computer about the air-fuel mixture, helping it make adjustments and also alerting you if there's an issue with fuel delivery or the catalytic converter.

NGK, a major supplier of original equipment oxygen sensors, builds these with an advanced ceramic element. This element has a special coating designed to resist contamination and protect against poisoning, which helps ensure the sensor lasts and performs reliably. Because NGK controls the ceramic element from the raw material to the finished product, they can ensure a high level of quality and performance.