{"product_id":"ntk-21500-oxygen-sensor-upstream","title":"NTK 21500 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect-Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK 21500 is a direct-fit oxygen sensor built for specific applications and engineered for threaded installation. It uses a non-heated design with a 7-inch harness and 18 mm thread diameter for a precise replacement profile.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect-fit oxygen sensor for specific applications\u003c\/li\u003e\n\u003cli\u003eNon-heated sensor design with threaded mounting\u003c\/li\u003e\n\u003cli\u003e7-inch wiring harness for application-specific routing\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter for the correct exhaust bung size\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment Details\u003c\/h2\u003e\u003cp\u003eCompatible with 1979-1980 Cadillac Eldorado, upstream. Compatible with 1979-1980 Cadillac Seville, upstream. This part cross-references Four Seasons 12006 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\u003eRestoring accurate exhaust oxygen feedback to the engine control system\u003c\/li\u003e\n\u003cli\u003eAddressing sensor-related drivability or emissions concerns\u003c\/li\u003e\n\u003cli\u003eCorrecting fitment issues caused by an incorrect sensor style or thread size\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eUse the threaded mounting style and harness length to confirm application match before installation. Verify the upstream location and 18 mm thread diameter against the original sensor on the vehicle. NTK 21500 is a specific-fit replacement, so matching the exact application is important for proper installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK is part of the NGK family and is recognized as a major original equipment oxygen sensor supplier. Each sensor is extensively tested during manufacturing to support OE-level fit, form, and function. Part number 21500 is built to meet or exceed OE specifications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731382689973,"sku":"BFPZ-21500","price":49.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21500_Fro.jpg?v=1794294398","url":"https:\/\/www.partcatalog.com\/products\/ntk-21500-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}