NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology. NTK is constantly improving sensor designs to provide excellent performance and improve resistance to failure. NTK works with their OEM manufacturers through each phase of development from concept to production.

ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning

The NGK Chevrolet C1500 1996-1997 Direct Fit Oxygen Sensor (Part Number 21543) is engineered to ensure optimal engine performance and emissions control for select GMC and Chevrolet trucks. Designed with advanced ceramic sensor elements, this oxygen sensor features a three-stage contaminant-resistant plasma jet and deposit trap overcoat that effectively protects against element poisoning, extending sensor lifespan and maintaining accuracy. This innovation helps your vehicle's onboard diagnostic system monitor and adjust the air-fuel mixture precisely, promoting better fuel economy and lower emissions. When installed, it provides reliable feedback to the ECU, ensuring smooth engine operation and compliance with environmental standards. The sensor's direct-fit design guarantees seamless installation, matching the original equipment specifications for a secure and efficient fit. Built by NTK, the world's leading OEM oxygen sensor supplier, this product benefits from cutting-edge manufacturing processes that prioritize durability and performance. It’s suitable for a range of GMC and Chevrolet models from 1996 to 1999, making it an essential component for maintaining your vehicle’s emission system and engine efficiency. This sensor complies with Prop 65 requirements and is ready for installation without the need for additional modifications. Trust NTK’s expertise and quality in providing a reliable, high-performance oxygen sensor that helps keep your vehicle running cleanly and efficiently.

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