{"product_id":"ntk-21504-oxygen-sensor-upstream","title":"NTK 21504 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect-Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eThe NTK 21504 is a direct-fit oxygen sensor built for specific applications that require a threaded, non-heated design. It uses a 2-wire layout and a 12.5-inch harness length for a factory-style replacement on select Chevrolet Camaro and Pontiac Firebird applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect Fit Oxygen Sensor line for specific applications\u003c\/li\u003e\n\u003cli\u003eNon-heated sensor design with 2-wire construction\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18 mm thread diameter\u003c\/li\u003e\n\u003cli\u003e12.5-inch wiring harness length\u003c\/li\u003e\n\u003cli\u003eOE-equivalent design for factory-style replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 21504 is part of the Direct Fit Oxygen Sensor product line, which focuses on application-specific coverage and streamlined replacement selection. As an oxygen sensor from NTK, a major OE supplier, this part is engineered for fit, form, and function that align with original equipment requirements. It is a threaded, non-heated sensor with a specific-fit design, making it a direct replacement for select upstream locations on the Chevrolet Camaro and Pontiac Firebird. This part cross-references Delphi ES10953 and DENSO Auto Parts 234-2013 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or slow-responding oxygen sensor\u003c\/li\u003e\n\u003cli\u003eAddressing check engine light concerns related to air-fuel feedback\u003c\/li\u003e\n\u003cli\u003eRestoring proper exhaust oxygen measurement for engine management\u003c\/li\u003e\n\u003cli\u003eCorrecting drivability issues tied to inaccurate sensor readings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the upstream location, manifold side, connector style, and thread size before installation. Confirm the vehicle uses a 2-lead, non-heated sensor with an 18 mm threaded mount and a 12.5-inch harness. Match the application exactly to the listed Chevrolet Camaro and Pontiac Firebird fitments for proper installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK tests these oxygen sensors during manufacturing to support quality and reliability that meet or exceed OE specifications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731382886581,"sku":"BFPZ-21504","price":56.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21504_Fro.jpg?v=1794294421","url":"https:\/\/www.partcatalog.com\/products\/ntk-21504-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}