{"product_id":"walker-250-25203-oxygen-sensor-upstream-left-or-upstream-right","title":"Walker 250-25203 Oxygen Sensor - Upstream Left or Upstream Right","description":"\u003ch2\u003eOE Base Wide-Band Oxygen Sensor\u003c\/h2\u003e\u003cp\u003eWalker OE Base Sensor 250-25203 is a specific-fit wide-band oxygen sensor for vehicles that need accurate exhaust feedback to the ECU. It is heated, uses a 6-wire layout, and is built with an oblong female connector, male blade terminals, and an M18 x 1.5 thread for the listed applications.\u003c\/p\u003e\u003cp\u003eFor drivers searching for a 2021-2024 Ram 1500 upstream right oxygen sensor or a 2021-2023 Dodge Challenger upstream left oxygen sensor, this Walker replacement is matched to the original sensor position and system requirements. The part number 250-25203 is also listed for 2021-2023 Dodge Charger upstream left applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWide-band oxygen sensor for precise air-fuel feedback\u003c\/li\u003e\n\u003cli\u003eHeated design for faster operating temperature\u003c\/li\u003e\n\u003cli\u003eSpecific-fit application for the listed vehicle positions\u003c\/li\u003e\n\u003cli\u003e6-wire, 6-terminal configuration\u003c\/li\u003e\n\u003cli\u003eOblong female connector with male blade terminals\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade\u003c\/li\u003e\n\u003cli\u003e22 mm wrench size and M18 x 1.5 thread size\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cp\u003eWalker Products OE Base Sensor line focuses on direct replacement engine management components built for application-specific fitment and diagnostic feedback. Part number 250-25203 is engineered for the exact sensor location and ECU input expected on the covered Ram and Dodge applications, helping maintain proper exhaust monitoring on vehicles equipped with wide-band oxygen sensing. Walker Products has supplied engine management and fuel system components since 1946 and operates as an ISO 9001\/TS 16949 certified manufacturer.\u003c\/p\u003e\u003cp\u003eThis part cross-references Monroe Shocks \u0026amp; Struts (e.g., 172286, 182286) for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Issues This Sensor Can Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCheck engine light related to oxygen sensor performance\u003c\/li\u003e\n\u003cli\u003eRough 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 sensor\u003c\/li\u003e\n\u003cli\u003eFault codes stored in the ECU for the affected sensor circuit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eBefore replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the upstream left or upstream right location on the vehicle before installation, and verify thread and connector match the original sensor. For best results, clear stored fault codes after installation and confirm the repair with a scan tool.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eWalker manufactures this OE Base Sensor as a standard replacement part for the listed applications, with fitment and diagnostic output aligned to the original vehicle requirements. The brand’s ISO-certified manufacturing process supports consistent sensor construction for modern engine management systems.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52985192743093,"sku":"DKHD-250-25203","price":222.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_25025203_Fro.jpg?v=1787122335","url":"https:\/\/www.partcatalog.com\/products\/walker-250-25203-oxygen-sensor-upstream-left-or-upstream-right","provider":"PartCatalog","version":"1.0","type":"link"}