{"product_id":"spectra-os5139-oxygen-sensor","title":"Spectra OS5139 Oxygen Sensor - Upstream, Upstream Left or Upstream Right","description":"\u003ch2\u003eOverview of Spectra OS5139 Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eThe Spectra OS5139 oxygen sensor is designed for precise emission control in select Ford and Mercury vehicles. This sensor helps maintain optimal engine performance and fuel efficiency by accurately monitoring exhaust gases.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Ford Contour, Mercury Cougar, and Mercury Mystique models\u003c\/li\u003e\n\u003cli\u003eDirect replacement oxygen sensor for emission control systems\u003c\/li\u003e\n\u003cli\u003eEnsures accurate air-fuel mixture readings for improved engine management\u003c\/li\u003e\n\u003cli\u003eDurable construction for reliable long-term operation\u003c\/li\u003e\n\u003cli\u003ePart number OS5139 for easy identification and fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Spectra OS5139 oxygen sensor is engineered to meet the specific emission control requirements of Ford Contour, Mercury Cougar, and Mercury Mystique vehicles. This sensor monitors the oxygen levels in the exhaust stream, providing critical data to the engine control unit (ECU) to adjust fuel injection and combustion. By maintaining the correct air-fuel ratio, the OS5139 helps reduce harmful emissions and supports efficient engine performance. The sensor is manufactured to precise specifications, ensuring compatibility and reliable operation within the emission control system.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper oxygen sensing for Ford Contour, Mercury Cougar, and Mystique models\u003c\/li\u003e\n\u003cli\u003eResolves engine performance problems related to faulty oxygen sensors\u003c\/li\u003e\n\u003cli\u003eHelps correct rough idling and poor fuel economy\u003c\/li\u003e\n\u003cli\u003eReduces increased emissions caused by sensor failure\u003c\/li\u003e\n\u003cli\u003ePrevents check engine light triggers related to oxygen sensor faults\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure vehicle compatibility with Ford Contour, Mercury Cougar, or Mercury Mystique before installation\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to avoid damaging the sensor or wiring harness\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery before sensor replacement to prevent electrical issues\u003c\/li\u003e\n\u003cli\u003eApply anti-seize compound on sensor threads if recommended by manufacturer\u003c\/li\u003e\n\u003cli\u003eVerify sensor connector is securely attached after installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eThe Spectra OS5139 oxygen sensor is manufactured under strict quality control standards to ensure durability and performance. While specific warranty details may vary, Spectra typically offers coverage against defects in materials and workmanship. Refer to the product documentation or supplier for exact warranty terms.\u003c\/p\u003e","brand":"Spectra","offers":[{"title":"Default Title","offer_id":44724455047349,"sku":"BCNK-OS5139","price":20.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SQ_OS5139_Sid.jpg?v=1775096764","url":"https:\/\/www.partcatalog.com\/products\/spectra-os5139-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}