NGK Buick Rainier 2007-2006 Direct Fit Oxygen Sensor

NGK is known worldwide as a leading manufacturer of ignition and sensor components, and they are the world's largest supplier of Original Equipment (OE) oxygen sensors. This direct-fit oxygen sensor, part number 21561, is designed to help your vehicle's on-board diagnostic system keep the engine running at its best. It provides crucial feedback to the engine control unit (ECU) to manage the air-fuel ratio, which is key for maximizing fuel efficiency and minimizing harmful emissions.

This sensor is built with an advanced ceramic element that features a three-stage contaminant-resistant plasma jet and deposit trap overcoat. This design helps protect the sensor from poisoning by contaminants, which can lead to premature failure. Because NTK is a ceramics company at its core, they have precise control over the ceramic element from the raw material all the way to the finished product, ensuring a well-built component. This part fits a wide range of vehicles, including models like the Chevrolet Colorado, Hummer H3, and Saab 9-7x, among many others.