{"product_id":"ntk-25637-oxygen-sensor-upstream","title":"NTK 25637 Oxygen Sensor - Upstream","description":"\u003ch2\u003eDirect Fit Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eNTK Direct Fit Oxygen Sensor 25637 is a specific-fit, heated oxygen sensor built for emission control service. It is engineered with a threaded mounting style, 3-wire design, and 72.5-inch harness length for a direct replacement application.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for precise air-fuel ratio feedback\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design for direct replacement service\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type for secure installation\u003c\/li\u003e\n\u003cli\u003e3-wire configuration for signal and heater circuit operation\u003c\/li\u003e\n\u003cli\u003e18 mm thread diameter and 72.5-inch wiring harness length\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eNTK 25637 is part of the Direct Fit Oxygen Sensor line, built to match OE-style fit, form, and function. NTK is known for oxygen sensor manufacturing and uses ceramic technology from raw material through finished sensor production. This sensor is extensively tested during manufacturing to meet or exceed OE specifications, making it a practical choice for emission system repair on the Saab 9000 and other confirmed applications. This part cross-references Monroe Shocks \u0026amp; Struts (e.g., 75-2104, 213-1265) for the same application.\u003c\/p\u003e\u003cp\u003eFits 1993 Saab 9000, upstream.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReplacing a failed oxygen sensor that triggers check engine light concerns\u003c\/li\u003e\n\u003cli\u003eRestoring air-fuel ratio feedback for emission control operation\u003c\/li\u003e\n\u003cli\u003eAddressing drivability issues tied to inaccurate exhaust oxygen readings\u003c\/li\u003e\n\u003cli\u003eCorrecting heater circuit faults in a heated sensor application\u003c\/li\u003e\n\u003cli\u003eServicing a threaded direct-fit sensor location on the exhaust system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the connector, thread size, and harness length before installation. Use the confirmed upstream fitment for the Saab 9000 and follow factory service procedures for removal and torque specifications. Inspect the wiring route and exhaust threads for damage before installing the new sensor.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eNTK states that these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand is part of the NGK family and is recognized as a major original equipment oxygen sensor supplier.\u003c\/p\u003e","brand":"NTK","offers":[{"title":"Default Title","offer_id":53731439902901,"sku":"BFPZ-25637","price":113.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/NO_25637_Fro.jpg?v=1794296527","url":"https:\/\/www.partcatalog.com\/products\/ntk-25637-oxygen-sensor-upstream","provider":"PartCatalog","version":"1.0","type":"link"}