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

Ensure optimal engine performance and emissions control with the NGK Cadillac Escalade 2003-2005 Direct Fit Oxygen Sensor, part number 21546. Designed with advanced ceramic sensor elements, this oxygen sensor provides precise feedback to your vehicle's onboard diagnostic system, helping to maintain the ideal air-fuel ratio for efficient combustion. Its contaminant-resistant plasma jet coating and deposit trap overcoat protect against element poisoning, enhancing durability and reliability over time. This sensor is engineered to meet or exceed OE specifications, ensuring a seamless fit and optimal operation in compatible models. Proper functioning of the oxygen sensor plays a critical role in maximizing fuel efficiency, reducing harmful emissions, and ensuring your vehicle passes emissions testing. Trust NGK’s proven technology and craftsmanship to deliver high-quality sensor performance for your vehicle's needs. This direct-fit replacement is suitable for a range of models including 2003-2005 Cadillac Escalade, 2004 Chevrolet Corvette, 2005 GMC Yukon, 2008-2011 Saturn Vue, and 2011 GMC Yukon XL 2500, among others. Built with precision and subjected to rigorous quality control, this sensor guarantees consistent operation, helping prevent check engine lights and potential drivetrain issues. Installation is straightforward, making it a reliable choice for both professional mechanics and DIY enthusiasts who value quality and longevity. The sensor complies with Prop 65 requirements and is not CARB-approved, with acknowledgment required for compliance purposes. Ideal for maintaining your vehicle’s performance and efficiency, the NGK oxygen sensor ensures your vehicle operates at its best while adhering to environmental standards.

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