Walker 350-34269 Oxygen Sensor - Downstream Left, Downstream Rear or Downstream Right

Walker 350-34269 Oxygen Sensor for Toyota and Lexus

Walker Products 350-34269 is a heated oxygen sensor built as an OE-style replacement for specific downstream applications. It is engineered for direct fitment on select Toyota and Lexus vehicles, with application-specific connector, wiring, and mounting details that match the vehicle position.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit design for the listed Toyota and Lexus applications
• 4-wire configuration with 22-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 14.88 in.; wiring harness length: 11.34 in.
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensor replacement

Detailed Description

Walker Products 350-34269 is part of the Walker Products Aftermarket line, which focuses on engine management and oxygen/air-fuel sensor replacements for specific vehicle applications. This sensor is built to provide the ECU with the expected diagnostic feedback for the listed downstream positions, helping maintain proper exhaust monitoring on vehicles such as the Toyota Camry, Toyota Tacoma, Toyota Sequoia, Toyota Tundra, Toyota Avalon, Toyota 4Runner, and Lexus ES350. The part number 350-34269 is a direct-fit option for drivers replacing a failed downstream oxygen sensor on select Toyota and Lexus models.

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

What It May Address

• Check engine light related to downstream oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing oxygen sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle year, make, model, and sensor position before ordering. This application includes downstream right, downstream rear, downstream front, and downstream left positions depending on the vehicle listed. Inspect the sensor, wiring harness, and connector for physical damage before installation, since damaged components can shorten service life and affect signal quality. Verify the threaded mounting location and connector orientation match the original sensor on the vehicle.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. Since 1946, the brand has supplied engine management and fuel system components for a wide range of vehicles.