Walker 350-64110 Oxygen Sensor - Downstream

OE Replacement Downstream Oxygen Sensor

Walker OE Replacement part number 350-64110 is a specific-fit, heated wide-band oxygen sensor for downstream applications. It is engineered for vehicles that need accurate exhaust feedback to the ECU, helping maintain proper fuel control and emissions monitoring.

Compatible With Toyota and Lexus hybrid and gasoline models across the 2018-2026 model years, this sensor is built for direct replacement use in the downstream position. The oblong female connector, 4-wire layout, M18 x 1.5 threaded mount, and 445 mm harness length support application-specific fitment.

Key Features

• Walker OE Replacement oxygen sensor, part number 350-64110
• Heated wide-band sensor for downstream placement
• Specific-fit design for direct application matching
• 4-wire configuration with blade terminals
• Oblong female connector and male terminals
• M18 x 1.5 threaded mounting style
• 445 mm overall length and harness length

Product Details

Walker Products designs engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. This downstream oxygen sensor is manufactured for the specified application so the ECU receives the correct diagnostic feedback. On vehicles such as the Toyota RAV4, Toyota Camry, Lexus ES300h, and Toyota Highlander, a worn sensor can contribute to poor engine operation, higher fuel use, increased exhaust emissions, or a malfunction indicator light.

The Walker OE Replacement line focuses on application-specific coverage and fitment position, making 350-64110 a practical choice when replacing a downstream wide-band sensor on Toyota and Lexus models.

What This Sensor Helps Address

• Check engine or malfunction indicator light related to oxygen sensor performance
• Incorrect exhaust feedback to the ECU
• Reduced fuel economy from inaccurate air-fuel monitoring
• Higher exhaust emissions from a failing downstream sensor
• Poor drivability caused by sensor or connector wear

Installation Notes

Confirm the downstream position before installation and verify connector shape, terminal count, thread size, and harness length against the original sensor. Inspect the sensor wiring harness and connector for physical damage before replacement, since damaged wiring can shorten service life and affect operation. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

Walker Products has been manufacturing engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification. The OE Replacement line is built around application-specific fitment and diagnostic feedback requirements for modern ECU-controlled vehicles.

Vehicle Fitment

• Fits 2023-2026 Lexus RX350h, Downstream
• Fits 2024-2026 Lexus RX450h+, Downstream
• Fits 2025-2026 Toyota Crown Signia, Downstream
• Fits 2024-2026 Toyota Grand Highlander, Downstream
• Fits 2021-2026 Toyota Sienna, Downstream
• Fits 2019-2025 Lexus ES300h, Downstream
• Fits 2022-2025 Lexus NX250, Downstream
• Fits 2022-2025 Lexus NX350h, Downstream
• Fits 2022-2025 Lexus NX450h+, Downstream
• Fits 2020-2025 Toyota Highlander, Downstream
• Fits 2019-2025 Toyota RAV4, Downstream
• Fits 2018-2024 Toyota Camry, Downstream
• Fits 2019-2024 Toyota Corolla, Downstream
• Fits 2021-2024 Toyota RAV4 Prime, Downstream
• Fits 2021-2024 Toyota Venza, Downstream
• Fits 2019-2022 Toyota Avalon, Downstream