{"product_id":"ntk-21516-oxygen-sensor","title":"NTK 21516 Oxygen Sensor","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21516\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21516 is designed for precise emission control in select Buick, Cadillac, Chevrolet, GMC, Honda, Isuzu, Oldsmobile, and Pontiac vehicles. This heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions compliance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for multiple GM and other makes\/models\u003c\/li\u003e\n\u003cli\u003eThreaded mounting with 18mm thread diameter\u003c\/li\u003e\n\u003cli\u003eFour-wire design for reliable signal transmission\u003c\/li\u003e\n\u003cli\u003e15.75-inch wiring harness length for proper installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Features and Specifications\u003c\/h2\u003e\u003cp\u003eThe NTK 21516 oxygen sensor features a heated element that allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its specific fitment ensures compatibility with a range of vehicles including the Buick Century, Cadillac DeVille, Chevrolet Silverado 1500, GMC Sierra 2500, Honda Passport, and Pontiac Grand Prix among others. The sensor’s 18mm threaded mounting type provides a secure and direct fit installation, while the four-wire configuration supports both the sensor signal and heater circuit. The 15.75-inch wiring harness length is designed to accommodate factory routing without modification.\u003c\/p\u003e\u003ch2\u003eAbout the NTK Direct Fit Oxygen Sensor Line\u003c\/h2\u003e\u003cp\u003eThe Direct Fit Oxygen Sensor line by NTK is engineered to provide exact replacement sensors that match OEM specifications. This product line focuses on delivering sensors that fit directly into the original mounting locations without the need for adapters or splicing. The 21516 part number is part of this line, ensuring a straightforward installation process and reliable performance for emission control systems.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper air-fuel ratio readings for improved engine efficiency\u003c\/li\u003e\n\u003cli\u003eResolves check engine light triggers related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eHelps reduce harmful emissions by maintaining accurate sensor feedback\u003c\/li\u003e\n\u003cli\u003ePrevents rough idling and poor fuel economy caused by faulty sensors\u003c\/li\u003e\n\u003cli\u003eSupports compliance with emission regulations in compatible vehicles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the NTK 21516 oxygen sensor, ensure the vehicle is cool to avoid burns. Use a proper oxygen sensor socket to avoid damage to the sensor or wiring. Verify the wiring harness length and connector match the vehicle’s factory harness. It is recommended to apply anti-seize compound on the threads to facilitate future removal, but avoid contaminating the sensor tip. Follow vehicle-specific torque specifications to secure the sensor properly.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor 21516 is manufactured to provide consistent sensor output and long service life. Warranty coverage details should be confirmed with the supplier or manufacturer, as they may vary by region and application.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43961908265141,"sku":"BFPZ-21516","price":63.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21516_Fro.jpg?v=1775006699","url":"https:\/\/www.partcatalog.com\/products\/ntk-21516-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}