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 Buick Rainier 2006-2007 Direct Fit Oxygen Sensor (Part Number 21561) is engineered to ensure your vehicle operates at peak performance while maintaining fuel efficiency and meeting emissions standards. Designed specifically for select GM, Isuzu, Saab, and Buick models, this OEM-quality sensor plays a vital role in your vehicle's on-board diagnostic system by providing precise feedback to optimize the air-fuel mixture. Accurate sensor readings help to improve engine response, reduce harmful emissions, and prevent catalytic converter damage, making it an essential component for vehicle longevity and environmental compliance.
The advanced ceramic sensor element features a three-stage contaminant-resistant plasma jet and deposit trap overcoat that shields against element poisoning, enhancing durability and sensor lifespan. This technology ensures reliable operation even in challenging driving conditions, reducing the likelihood of sensor failure and costly repairs.
As part of NTK’s commitment to quality, the sensor is manufactured with state-of-the-art materials and processes, ensuring consistency and performance. NTK collaborates closely with OEM manufacturers from concept to production, continuously refining sensor designs for improved resistance to failure and contamination. This direct-fit replacement guarantees seamless installation and compatibility, restoring optimal engine operation quickly and efficiently. Whether for routine maintenance or repair, the NGK oxygen sensor is a reliable choice that supports your vehicle's emissions control system and helps achieve maximum fuel economy.
This sensor complies with Prop 65 regulations and is suitable for air freight shipping, making it convenient for professional installation or DIY repairs, provided proper handling protocols are followed. Trust NGK and NTK’s expertise in sensor technology to keep your vehicle running smoothly and efficiently.

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