Walker 350-64114 Oxygen Sensor - Upstream

Walker OE Replacement Oxygen Sensor

Walker OE Replacement part number 350-64114 is a specific-fit wide-band oxygen sensor for select Toyota and Lexus applications. It is built for upstream placement and provides the ECU with the feedback needed for accurate air-fuel control.

Compatible with 2019-2024 Toyota Corolla, upstream, and 2019-2024 Lexus UX250h, upstream, this sensor is a direct replacement for vehicles that require a heated, wide-band design. Part number 350-64114 also fits 2019-2022 Lexus UX200, upstream.

Key Features

• Wide-band oxygen sensor for precise exhaust feedback
• Heated design for faster operating temperature
• Specific-fit application for correct vehicle placement
• 4-wire configuration
• 450 mm wiring harness length
• M18 x 1.5 thread size with 22 mm wrench size
• Upstream sensor position

Product Details

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for specific vehicle applications. The 350-64114 is engineered for the exact fitment position and signal requirements used by the ECU, making it a practical choice for Toyota Corolla and Lexus UX-series models that need an upstream wide-band sensor. Walker OE Replacement focuses on application-specific coverage, which helps maintain proper diagnostic feedback and air-fuel monitoring.

This part cross-references no listed aftermarket part numbers in the provided data.

Common Issues This Sensor Can Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by inaccurate air-fuel feedback
• Increased fuel consumption from a failing upstream sensor
• Higher exhaust emissions from incorrect sensor readings
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the upstream location before installation and verify thread size, connector style, and harness routing against the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect ECU feedback. For best results, compare the removed unit to part number 350-64114 before installation on a Toyota Corolla, Lexus UX250h, or Lexus UX200.

Quality Assurance

Walker Products states that its engine management sensors are manufactured for specific applications and supported by ISO 9001/TS 16949 quality systems. Since 1946, the brand has focused on OE-style replacement coverage for vehicle sensor and fuel system needs.