{"product_id":"walker-250-25181-oxygen-sensor-upstream-left-or-upstream-right","title":"Walker 250-25181 Oxygen Sensor - Upstream Left or Upstream Right","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eWalker OE Base Sensor 250-25181 is a specific-fit oxygen sensor built as a standard replacement for select applications. It uses a heated wide-band design with a threaded M18 x 1.5 mount, a D-shape female connector, and a 5-wire layout for direct sensor replacement.\u003c\/p\u003e\u003cp\u003eCompatible With 2024 Ford Expedition, upstream left; 2024 Lincoln Navigator, upstream left; and 2020 Cadillac CT6, upstream right. This part number, 250-25181, is a fitment-specific option for vehicles that require the OE Base Sensor configuration.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHeated wide-band oxygen sensor for precise exhaust feedback.\u003c\/li\u003e\n\u003cli\u003eSpecific-fit design for direct application matching.\u003c\/li\u003e\n\u003cli\u003eThreaded M18 x 1.5 mounting with 7\/8\" wrench size.\u003c\/li\u003e\n\u003cli\u003eFemale D-shape connector with blade terminals.\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for OE-style service work.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe Walker OE Base Sensor line focuses on application-specific oxygen sensors that match the required connector, thread, and wiring configuration. Part number 250-25181 uses a 6-terminal, 5-wire setup with a 530 mm harness length, 20-gauge wiring, and a heated wide-band sensing element. Its threaded mounting style and metric thread size support a direct replacement approach where the original sensor specification must be maintained.\u003c\/p\u003e\u003cp\u003eFor buyers searching for a Ford Expedition oxygen sensor, Lincoln Navigator oxygen sensor, or Cadillac CT6 oxygen sensor, this OE Base Sensor part number 250-25181 provides a fitment-matched solution. It is also relevant for service work where the upstream sensor location and connector style must align with the original equipment layout.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFault codes related to oxygen sensor performance.\u003c\/li\u003e\n\u003cli\u003eRough idle or drivability issues tied to exhaust feedback.\u003c\/li\u003e\n\u003cli\u003eIncorrect air-fuel ratio readings from a worn sensor.\u003c\/li\u003e\n\u003cli\u003eConnector or wiring mismatch during sensor replacement.\u003c\/li\u003e\n\u003cli\u003eThreaded sensor replacement needs on specific-fit applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the upstream left or upstream right application before ordering, since fitment varies by vehicle and engine configuration. Confirm the connector shape, terminal count, thread size, and harness length against the original sensor before installation. Use the correct 7\/8\" wrench size and ensure the threaded mount is clean before fitting the replacement sensor.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker OE Base Sensor parts are built as standard replacement components for application-specific service. Part number 250-25181 is listed with specific fitment data for the 2024 Ford Expedition, 2024 Lincoln Navigator, and 2020 Cadillac CT6.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":53519200485557,"sku":"DKHD-250-25181","price":131.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_25025181_FRO.jpg?v=1791958273","url":"https:\/\/www.partcatalog.com\/products\/walker-250-25181-oxygen-sensor-upstream-left-or-upstream-right","provider":"PartCatalog","version":"1.0","type":"link"}