{"product_id":"ntk-21503-oxygen-sensor-upstream","title":"NTK 21503 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect-Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK Oxygen Sensor 21503 is a specific-fit, threaded oxygen sensor built for direct replacement applications. It uses a non-heated design with a 5.5-inch wiring harness and a 14 mm thread diameter for a precise OE-style installation.\u003c\/p\u003e\u003cp\u003eCompatible with 1994 Saturn SC2, upstream; 1994 Saturn SL2, upstream; and 1994 Saturn SW2, upstream. This NTK oxygen sensor is engineered for California emissions applications and OE equivalent design requirements.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSpecific-fit oxygen sensor for direct replacement use\u003c\/li\u003e\n\u003cli\u003eNon-heated sensor design\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 14 mm thread diameter\u003c\/li\u003e\n\u003cli\u003e5.5-inch wiring harness length\u003c\/li\u003e\n\u003cli\u003eOE equivalent design for the listed Saturn applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 21503 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific coverage and OE-style fit, form, and function. As an oxygen sensor from NTK, The Sensor Specialist, it reflects the brand’s background in ceramic technology and original equipment sensor manufacturing. For 1994 Saturn SC2, SL2, and SW2 upstream applications, this sensor is built to match the required configuration without universal adaptation.\u003c\/p\u003e\u003cp\u003eThis part cross-references Delphi ES10950 and OSC 13050 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a worn or inaccurate upstream oxygen sensor\u003c\/li\u003e\n\u003cli\u003eAddressing emissions-related fault codes tied to sensor performance\u003c\/li\u003e\n\u003cli\u003eRestoring proper air-fuel feedback to the engine control system\u003c\/li\u003e\n\u003cli\u003eSupporting California emissions-equipped Saturn applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the upstream location, threaded mounting style, and harness length before installation. Confirm the vehicle’s emissions configuration and connector routing against the original sensor. Use the part number 21503 to match the correct application before ordering.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK tests oxygen sensors during manufacturing to help ensure quality and reliability that meet or exceed OE specifications. Part number 21503 is built as a direct-fit replacement for the listed applications.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731382821045,"sku":"BFPZ-21503","price":47.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_21503_Fro.jpg?v=1794294413","url":"https:\/\/www.partcatalog.com\/products\/ntk-21503-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}