{"product_id":"walker-350-34312-oxygen-sensor","title":"Walker 350-34312 Oxygen Sensor","description":"\u003ch2\u003eWalker 350-34312 Oxygen Sensor Overview\u003c\/h2\u003e\u003cp\u003eWalker Products 350-34312 is a heated oxygen sensor built as a direct-fit OE-style replacement for specific Lexus and Toyota applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper air-fuel control and emissions performance.\u003c\/p\u003e\u003cp\u003eWalker Products Aftermarket focuses on application-specific engine management sensors, and this oxygen sensor follows that approach with the correct fitment position, threaded mounting, and connector configuration for the listed vehicles.\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-fit design for listed Lexus GS300 and Toyota Highlander\/RAV4 applications\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\u003eRadiused polygon male connector for proper vehicle-side connection\u003c\/li\u003e\n\u003cli\u003eWiring harness length: 29.06 in.; overall length: 32.6 in.\u003c\/li\u003e\n\u003cli\u003eWalker Products part number 350-34312 for direct identification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eWalker Products 350-34312 oxygen sensor is designed for vehicles that rely on accurate exhaust oxygen feedback to manage fuel delivery and emissions. It is a specific-fit sensor for 1998-2005 Lexus GS300 upstream applications, plus select 2001-2004 Toyota Highlander and 2001-2003 Toyota RAV4 downstream positions. For shoppers searching for a Lexus GS300 upstream oxygen sensor or a Toyota Highlander downstream oxygen sensor, this part number provides a direct replacement path.\u003c\/p\u003e\u003cp\u003eAs part of the Walker Products Aftermarket line, this sensor is built around application-specific fitment so the ECU receives the expected signal from the correct mounting position. The design supports vehicles that store fault codes when an oxygen sensor or related circuit begins to fail, making accurate replacement important for drivability and emissions control. Part number 350-34312 is also a useful reference when comparing Walker 350-34312 against other OE-style oxygen sensor listings.\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 exhaust feedback\u003c\/li\u003e\n\u003cli\u003eIncreased fuel consumption from inaccurate air-fuel control\u003c\/li\u003e\n\u003cli\u003eElevated exhaust emissions from a failing heated oxygen sensor\u003c\/li\u003e\n\u003cli\u003eFault codes tied to the sensor, wiring harness, or connector\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify the exact position before installation: upstream, downstream, downstream front, or downstream rear.\u003c\/li\u003e\n\u003cli\u003eConfirm connector shape, wire count, and thread diameter match the original sensor.\u003c\/li\u003e\n\u003cli\u003eInspect the sensor wiring harness and connector for physical damage before replacement.\u003c\/li\u003e\n\u003cli\u003eCheck the exhaust bung threads and mounting surface for contamination or wear.\u003c\/li\u003e\n\u003cli\u003eUse the vehicle’s service information to confirm the correct bank and sensor location.\u003c\/li\u003e\n\u003c\/ul\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 for worldwide vehicle applications. The company is ISO 9001\/TS 16949 certified and has supplied engine management components since 1946.\u003c\/p\u003e\u003cp\u003eCompatible With: 1998-2005 Lexus GS300 upstream; 2001-2004 Toyota Highlander downstream; 2001-2003 Toyota Highlander downstream; 2001-2003 Toyota RAV4 downstream rear and downstream front. Walker 350-34312 is a direct-fit oxygen sensor for these listed applications.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":51870211768501,"sku":"DKHD-350-34312","price":58.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_35034312_Fro.jpg?v=1774892045","url":"https:\/\/www.partcatalog.com\/products\/walker-350-34312-oxygen-sensor","provider":"PartCatalog","version":"1.0","type":"link"}