{"product_id":"walker-350-34400-oxygen-sensor-upstream-or-upstream-rear","title":"Walker 350-34400 Oxygen Sensor - Upstream or Upstream Rear","description":"\u003ch2\u003eWalker OE Replacement Oxygen Sensor for Ford Fiesta\u003c\/h2\u003e\u003cp\u003eWalker OE Replacement oxygen sensor \u003cstrong\u003e350-34400\u003c\/strong\u003e is built for specific vehicle applications and provides the ECU feedback needed for proper fuel control and emissions monitoring. This heated, threaded sensor is a direct-fit style solution for \u003cstrong\u003e1998-2001 Ford Fiesta upstream\u003c\/strong\u003e applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor for faster operating response\u003c\/li\u003e\n\u003cli\u003eSpecific fitment for upstream placement\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18.0 mm thread diameter\u003c\/li\u003e\n\u003cli\u003e4-wire design with 20-gauge wiring\u003c\/li\u003e\n\u003cli\u003eWiring harness length: 5.83\u003c\/li\u003e\n\u003cli\u003eOverall length: 9.37\u003c\/li\u003e\n\u003cli\u003eWalker OE Replacement line for application-specific sensor coverage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eWalker Products engineers its engine management and oxygen\/air-fuel sensors as OE replacement parts for defined vehicle applications. Part number \u003cstrong\u003e350-34400\u003c\/strong\u003e is made for the upstream position on the \u003cstrong\u003eFord Fiesta\u003c\/strong\u003e and is intended to deliver the diagnostic feedback the ECU expects from the sensor circuit. The heated design helps the sensor reach operating temperature more quickly, which is important for accurate exhaust monitoring during normal driving.\u003c\/p\u003e\u003cp\u003eThe Walker OE Replacement line focuses on application-specific fitment, including sensor position, connector layout, and wiring configuration. For \u003cstrong\u003e1998-2001 Ford Fiesta upstream\u003c\/strong\u003e service, this sensor supports emissions system monitoring and fuel mixture control when the original sensor has aged or failed. If the sensor circuit is damaged, the wiring harness and connector should also be inspected for wear or physical damage.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light related to oxygen sensor performance\u003c\/li\u003e\n\u003cli\u003ePoor engine operation caused by incorrect air-fuel feedback\u003c\/li\u003e\n\u003cli\u003eIncreased fuel consumption from inaccurate exhaust readings\u003c\/li\u003e\n\u003cli\u003eHigher exhaust emissions from a failing upstream sensor\u003c\/li\u003e\n\u003cli\u003eStored ECU fault codes tied to the sensor circuit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm the upstream sensor location before ordering and match the threaded mounting style, wire count, and harness length to the original part. Inspect the connector and wiring for heat damage, corrosion, or abrasion before installation. A proper diagnosis should include the sensor circuit and related components, since wiring faults can shorten sensor life and trigger fault codes.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker Products states that its engine management and oxygen\/air-fuel sensors are developed as OE replacement parts and manufactured for specific applications. The company is ISO 9001\/TS 16949 certified and has supplied engine management and fuel system components since 1946.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":51870212096181,"sku":"DKHD-350-34400","price":42.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_35034400_Fro.jpg?v=1774892070","url":"https:\/\/www.partcatalog.com\/products\/walker-350-34400-oxygen-sensor-upstream-or-upstream-rear","provider":"PartCatalog","version":"1.0","type":"link"}