Walker 350-341090 Oxygen Sensor - Downstream Right

Walker OE Replacement Oxygen Sensor

Walker OE Replacement part number 350-341090 is a specific-fit heated narrow-band oxygen sensor for downstream right applications. It is built for 2018-2022 Toyota Sequoia and 2018-2021 Toyota Tundra, with the correct connector, thread size, and wire configuration for the listed position.

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for a wide range of vehicles. The OE Replacement line focuses on application-specific fitment and diagnostic feedback to the ECU, making it a direct choice for drivers servicing a downstream right sensor on Toyota Sequoia or Toyota Tundra models.

• Part number 350-341090
• Heated narrow-band oxygen sensor
• Specific fit for downstream right location
• 4-wire design with square connector and spade terminals
• M18 x 1.5 thread size and 22 mm wrench size
• Standard replacement grade for OE-style service
• Fits 2018-2022 Toyota Sequoia, downstream right
• Fits 2018-2021 Toyota Tundra, downstream right

This oxygen sensor monitors exhaust oxygen content and sends feedback to the ECU so the engine management system can adjust fuel control as needed. For Toyota Sequoia and Toyota Tundra owners searching for a downstream right oxygen sensor replacement, 350-341090 provides the correct application-specific design, overall length, and mounting style for the listed vehicles.

Common Reasons for Replacement

• Check engine light or MIL related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation or inconsistent air-fuel control
• Increased exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Verify the downstream right position before ordering, since oxygen sensors are position-specific. Inspect the sensor wiring harness, connector, and surrounding exhaust components for heat damage or physical wear before installation. Confirm the M18 x 1.5 thread size and 22 mm wrench size match the vehicle application, and clear diagnostic trouble codes after repair if required by the vehicle service procedure.

Quality Assurance

Walker Products states that its engine management sensors are manufactured for specific applications and fitment positions, with production supported by ISO 9001/TS 16949 quality systems. Since 1946, the brand has supplied engine management and fuel system components for vehicle service needs.