NGK Chevrolet Astro 1999-1998 Direct Fit Oxygen Sensor

This NGK oxygen sensor, part number 21517, is what you get in the box. It's designed to be a direct fit for a range of vehicles, including models like the Buick LaCrosse, Chevrolet Astro, and Pontiac Grand Prix. Oxygen sensors are a key part of your vehicle's onboard diagnostic system. They help keep your engine running at its best, improve your gas mileage, and cut down on harmful exhaust emissions by constantly feeding information about the air-fuel mix back to the engine computer.

NGK, a major supplier of original equipment oxygen sensors, uses advanced technology in their ceramic sensor element. This design includes a special coating that acts as a trap for contaminants and a plasma jet, which helps protect the sensor from poisoning. This means it's built to last and maintain accurate readings, even in tough conditions. By working closely with vehicle manufacturers from the start of development, NGK ensures their sensors meet the specific needs of each application.