{"product_id":"ntk-21065-oxygen-sensor","title":"NTK 21065 Oxygen Sensor - Downstream Left or Downstream Right","description":"\u003ch2\u003eOverview of NTK Direct Fit Oxygen Sensor 21065\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor 21065 is engineered for precise emission control in select Chevrolet, GMC, and Hummer vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for faster response times\u003c\/li\u003e\n\u003cli\u003eSpecific fit for Chevrolet Silverado 1500, GMC Sierra 1500, and Hummer H2\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\u003cli\u003e15-inch wiring harness length for convenient installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDirect Fit Oxygen Sensor Product Line Details\u003c\/h2\u003e\u003cp\u003eThe NTK Direct Fit Oxygen Sensor line focuses on providing vehicle-specific sensors that match OEM specifications. This product line emphasizes exact fitment and compatibility, reducing installation time and ensuring proper sensor operation. The 21065 part number belongs to this line, offering a direct replacement solution for emission control systems in targeted GM models.\u003c\/p\u003e\u003ch2\u003eTechnical Description and Features\u003c\/h2\u003e\u003cp\u003eThe NTK 21065 oxygen sensor features a heated element that accelerates sensor activation, improving fuel management and emissions control shortly after engine start. Its four-wire design supports both the sensor signal and heater circuit, enhancing durability and performance. The 18mm threaded mounting type allows secure installation in the exhaust system, while the 15-inch wiring harness length provides flexibility during replacement. This sensor is specifically designed for the Chevrolet Silverado 1500, GMC Sierra 1500, and Hummer H2, ensuring compatibility and reliable operation.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores accurate oxygen sensing for proper air-fuel ratio control\u003c\/li\u003e\n\u003cli\u003eResolves check engine light issues related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eImproves fuel efficiency by providing precise exhaust gas readings\u003c\/li\u003e\n\u003cli\u003eHelps reduce harmful emissions by maintaining optimal combustion\u003c\/li\u003e\n\u003cli\u003eEliminates rough idling or engine hesitation caused by faulty sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the NTK 21065 oxygen sensor, ensure the vehicle is compatible with this specific part number and model fitment. Use proper tools to avoid damaging the 18mm threaded sensor during removal or installation. Verify the wiring harness length of 15 inches is sufficient for your vehicle’s sensor location. It is recommended to inspect the exhaust port for debris before installation to ensure a secure and leak-free fit.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eNTK oxygen sensors are manufactured to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor 21065 undergoes rigorous testing to ensure reliable operation in Chevrolet Silverado 1500, GMC Sierra 1500, and Hummer H2 vehicles. Warranty coverage details should be confirmed with the supplier or manufacturer to ensure protection against defects.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":43961907118261,"sku":"BFPZ-21065","price":56.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21065_Fro.jpg?v=1775006696","url":"https:\/\/www.partcatalog.com\/products\/ntk-21065-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}