Walker 250-21056 Oxygen Sensor - Upstream

Overview of Walker Products OE Oxygen Sensor 250-21056

The Walker Products OE Oxygen Sensor 250-21056 is designed for specific vehicle applications, including Chevrolet and Toyota models such as the 4Runner, Corolla, Supra, and more. This non-heated oxygen sensor features a flange mount design and precise wiring specifications to ensure accurate emission control performance.

• Wiring harness length: 17.44 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non-heated oxygen sensor
• Specific fit for select Chevrolet and Toyota models
• Connector shape: Radiused polygon with female gender
• Thread diameter: 18.0 mm
• Overall length: 20.98 inches
• Mounting type: Flange mount
• Single wire configuration

Detailed Product Description

The Walker Products OE line focuses on providing original equipment quality parts that meet or exceed OEM specifications. The 250-21056 oxygen sensor is engineered to deliver reliable emission readings by accurately measuring oxygen levels in the exhaust gases. Its non-heated sensor type is suitable for vehicles that do not require a heated element, reducing complexity and potential failure points. The sensor’s flange mount and 18.0 mm thread diameter ensure a secure and proper fit in the exhaust system. The 17.44-inch wiring harness and 20 gauge wire provide sufficient length and durability for installation in Chevrolet and Toyota vehicles, including models like the Toyota Land Cruiser, MR2, and Chevrolet Pickup.

Compatible Vehicles and Applications

• Chevrolet 4Runner, Nova, Pickup, Van
• Toyota 4Runner, Celica, Corolla, Cressida, Land Cruiser, MR2, Supra, Tercel

This oxygen sensor is designed specifically for these models, ensuring proper fitment and function without the need for modifications.

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor engine performance
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor failure
• Reduced fuel efficiency from inaccurate oxygen level detection
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

When installing the Walker Products OE oxygen sensor 250-21056, ensure the flange mount is securely fastened and the 18.0 mm threaded sensor is properly tightened to avoid exhaust leaks. Verify the connector’s radiused polygon shape and female gender match the vehicle’s wiring harness for a seamless connection. Handle the sensor wiring carefully to prevent damage to the 20 gauge wire and maintain the 17.44-inch harness length for optimal routing.

Quality Assurance and Warranty

Walker Products OE parts are manufactured to meet stringent quality standards, providing reliable performance and durability. The 250-21056 oxygen sensor undergoes rigorous testing to ensure compatibility and function with specified Chevrolet and Toyota models. Warranty details are provided by Walker and typically cover defects in materials and workmanship under normal use conditions.