{"product_id":"walker-250-54003-oxygen-sensor","title":"Walker 250-54003 Oxygen Sensor - Upstream Front or Upstream Rear","description":"\u003ch2\u003eOverview of Walker Products OE Oxygen Sensor 250-54003\u003c\/h2\u003e\u003cp\u003eThe Walker Products OE Oxygen Sensor 250-54003 is designed specifically for select Lexus and Toyota models, including the Avalon, ES300, and Sienna. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated oxygen sensor with 4-wire design for reliable operation\u003c\/li\u003e\n\u003cli\u003eSpecific fit for Lexus Avalon, Toyota ES300, and Sienna models\u003c\/li\u003e\n\u003cli\u003eThreaded mounting type with 18.0 mm thread diameter for secure installation\u003c\/li\u003e\n\u003cli\u003e15.28-inch wiring harness length with 20-gauge wire for durability\u003c\/li\u003e\n\u003cli\u003eRadiused polygon male connector for proper electrical connection\u003c\/li\u003e\n\u003cli\u003eOverall length of 18.82 inches to accommodate factory specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Walker Products OE oxygen sensor (part number 250-54003) features a heated sensor element that allows for faster warm-up times and improved emissions monitoring. The 4-wire configuration includes two wires for the heating element and two for the sensor signal, ensuring accurate and stable readings. The sensor’s 15.28-inch wiring harness and 20-gauge wire gauge provide sufficient length and durability for installation in the engine bay. Its radiused polygon male connector matches factory connectors for a secure and reliable electrical connection. The threaded mounting type with an 18.0 mm diameter ensures compatibility with the exhaust system of Lexus Avalon, Toyota ES300, and Sienna vehicles. The overall length of 18.82 inches is designed to meet OEM specifications, facilitating a proper fit and function.\u003c\/p\u003e\u003ch2\u003eWalker Products OE Brand Line Information\u003c\/h2\u003e\u003cp\u003eThe Walker Products OE line focuses on delivering emission control components that meet original equipment standards. This oxygen sensor is engineered to match the fit, form, and function of the factory-installed sensor, providing consistent performance and durability. By adhering to OE specifications, Walker Products OE sensors help maintain vehicle emissions compliance and engine efficiency.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores accurate air-fuel ratio readings for improved fuel economy\u003c\/li\u003e\n\u003cli\u003eResolves check engine light triggers related to oxygen sensor faults\u003c\/li\u003e\n\u003cli\u003eHelps reduce harmful emissions by ensuring proper catalytic converter function\u003c\/li\u003e\n\u003cli\u003eEliminates rough idling or engine hesitation caused by faulty sensors\u003c\/li\u003e\n\u003cli\u003ePrevents failed emissions tests due to sensor malfunctions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the vehicle is cool before removing the old sensor to avoid burns\u003c\/li\u003e\n\u003cli\u003eUse an oxygen sensor socket or appropriate tool for removal and installation\u003c\/li\u003e\n\u003cli\u003eDo not over-tighten; torque to manufacturer specifications for the 18.0 mm threaded sensor\u003c\/li\u003e\n\u003cli\u003eVerify connector compatibility with the radiused polygon male plug before installation\u003c\/li\u003e\n\u003cli\u003eInspect wiring harness for damage and secure routing to prevent chafing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eWalker Products OE oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure reliability and durability. This part number 250-54003 is backed by Walker’s quality assurance protocols, providing confidence in its performance for Lexus Avalon, Toyota ES300, and Sienna vehicles. Warranty details are available through authorized distributors and should be confirmed at the time of purchase.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":43533435470005,"sku":"DKHD-250-54003","price":173.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_25054003_Fro.jpg?v=1774891809","url":"https:\/\/www.partcatalog.com\/products\/walker-250-54003-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}