{"product_id":"ntk-21549-oxygen-sensor","title":"NTK 21549 Oxygen Sensor","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21549\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21549 is engineered for precise emission control in select GM vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance and reduced emissions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor type for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for select Cadillac, Chevrolet, GMC, and Hummer models\u003c\/li\u003e\n\u003cli\u003e15-inch wiring harness length for convenient installation\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18mm thread diameter\u003c\/li\u003e\n\u003cli\u003eFour-wire configuration for reliable signal transmission\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis NTK oxygen sensor, part number 21549, belongs to the Direct Fit Oxygen Sensor line, which focuses on providing exact replacement sensors tailored to vehicle-specific requirements. The heated sensor design allows quicker activation, improving fuel efficiency and emissions control shortly after engine start. With a 15-inch wiring harness and four wires, this sensor integrates seamlessly with the vehicle’s existing wiring harness, minimizing installation complexity. The threaded mounting type with an 18mm diameter ensures a secure and proper fit in the exhaust system.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis oxygen sensor is compatible with a range of GM vehicles, including Cadillac Escalade, Chevrolet Silverado 1500, GMC Sierra 2500 HD, and Hummer H2 models. It is designed to meet the exact specifications required for these vehicles, ensuring proper function and emission compliance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHelps resolve issues with poor fuel economy\u003c\/li\u003e\n\u003cli\u003eAddresses rough engine idle and hesitation\u003c\/li\u003e\n\u003cli\u003eReduces excessive exhaust emissions\u003c\/li\u003e\n\u003cli\u003ePrevents check engine light related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eImproves overall engine performance and drivability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the NTK 21549 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. The 15-inch wiring harness length provides flexibility during installation, but verify connector compatibility with your vehicle’s harness. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK’s Direct Fit Oxygen Sensor line is manufactured to meet OEM standards for durability and performance. While specific warranty details are not provided here, NTK products typically undergo rigorous testing to ensure reliability and long service life in emission control applications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":51926780838069,"sku":"BFPZ-21549","price":79.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21549_Fro.jpg?v=1775006702","url":"https:\/\/www.partcatalog.com\/products\/ntk-21549-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}