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 Part Number 21566 oxygen sensor is a direct-fit replacement designed specifically for Cadillac models including the 2007 to 2009 SRX and the 2006 to 2009 STS. Engineered for precise performance, this sensor plays a vital role in optimizing the vehicle's air-fuel mixture by providing real-time feedback to the engine control unit (ECU). Proper functioning of this sensor helps maximize fuel efficiency, reduce emissions, and maintain engine health. Using advanced ceramic technology, the sensor features a contaminant-resistant plasma jet and deposit trap overcoat that guards against poisoning, ensuring longevity and reliability under demanding conditions.

Designed by NGK, a trusted name in automotive sensors, this oxygen sensor adheres to OE specifications to ensure perfect fit and performance. Its robust construction provides resistance to contamination and failure, making it a dependable choice for maintaining your vehicle's emission control system. The sensor's compact design makes installation straightforward, and it is suitable for various Cadillac models, enhancing the vehicle's diagnostic capabilities while complying with all necessary regulations. This product is an essential component for vehicle owners seeking to uphold optimal engine function and emissions compliance.

Trust NGK for high-quality, durable sensors backed by industry-leading technology and OEM collaboration. This oxygen sensor is an ideal replacement part that ensures your Cadillac continues to operate smoothly, efficiently, and within environmental standards, with a focus on long-term performance and vehicle reliability.

Features: