NTK 21066 Direct Fit Oxygen Sensor for Select 2008-2017 Cadillac, Chevrolet, and GMC

Fits select 2008-2017 Cadillac, Chevrolet, and GMC models, including Escalade, Silverado, Sierra, Yukon, Tahoe, Suburban, and Corvette.

As the world's largest supplier of OE oxygen sensors, NTK (the sensor division of NGK) designs the 21066 to meet or exceed original equipment standards for precise engine management. This direct-fit sensor is a critical component of your vehicle's on-board diagnostic (OBDII) system, providing constant closed-loop feedback to the ECU to maintain the optimal air-fuel ratio, maximize fuel economy, and reduce emissions. Replacing a worn or fouled sensor can restore lost engine performance and resolve catalytic converter efficiency codes.

• Advanced Ceramic Element: Features a state-of-the-art ceramic element controlled by NTK from raw material to finished product for superior reliability.
• Contaminant Protection: Engineered with a 3-stage contaminant-resistant plasma jet and a deposit trap overcoat to protect the element from poisoning and extend service life.
• OEM Precision: Direct-fit design ensures the correct harness length and OE-style connector for a simple, plug-and-play installation.
• Technical Specs: Manufacturer Part Number 21066; designed for precise voltage signaling and rapid response times.