Walker 250-24645 Oxygen Sensor - Downstream Rear

Overview of Walker 250-24645 Oxygen Sensor for Toyota Sienna

The Walker 250-24645 oxygen sensor is designed specifically for Toyota Sienna models, providing precise emission control monitoring. This heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions compliance.

• Heated oxygen sensor with 4-wire configuration
• Specific fit for Toyota Sienna vehicles
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wiring harness length of 18.23 inches and overall length of 21.77 inches
• Wire gauge measurement of 20 for reliable signal transmission

Walker Products OE Brand Line Details

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality components. Walker Products OE parts are engineered to meet or exceed factory specifications, ensuring compatibility and durability for emission control systems. The 250-24645 sensor maintains the integrity of the vehicle’s emission system by providing accurate sensor readings and reliable operation.

Technical Description and Features

The Walker 250-24645 oxygen sensor features a heated sensor element that allows for faster warm-up times and improved sensor response. Its 4-wire design includes two wires for the heater circuit and two for the sensor signal, enhancing performance and durability. The sensor’s threaded mounting type with an 18.0 mm diameter ensures a secure fit in the exhaust system. The radiused polygon male connector provides a precise and stable electrical connection, reducing the risk of signal loss or corrosion. With a wiring harness length of 18.23 inches and an overall length of 21.77 inches, this sensor is designed to fit the Toyota Sienna’s specific layout requirements.

Common Applications and Problem Resolution

• Restores accurate oxygen level readings for proper air-fuel mixture control
• Helps resolve engine performance issues such as rough idling or hesitation
• Reduces emissions by ensuring proper catalytic converter function
• Prevents check engine light triggers related to oxygen sensor faults
• Supports fuel efficiency by maintaining optimal combustion conditions

Installation Notes and Tips

When installing the Walker 250-24645 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Confirm the connector matches the radiused polygon male design for a secure fit. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Verify all electrical connections are secure before completing installation.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards, ensuring reliable performance and durability. The 250-24645 part number undergoes rigorous testing to comply with emission control requirements. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term use in Toyota Sienna vehicles.