Walker 250-22003 Oxygen Sensor - Downstream or Upstream

Overview of Walker 250-22003 Oxygen Sensor

The Walker 250-22003 oxygen sensor is designed specifically for select Geo and Toyota models, including the Celica, Corolla, MR2, and Prizm. This non-heated sensor provides precise emission control by monitoring oxygen levels in the exhaust system to optimize engine performance and reduce emissions.

• Wiring harness length: 16.46 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non heated
• Wire quantity: 2 wires
• Connector shape: Radiused polygon
• Connector gender: Male
• Thread diameter: 18.0 mm
• Overall length: 20.0 inches
• Mounting type: Threaded

Walker Products OE Brand Line Details

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality and fitment. The Walker Products OE line ensures that each sensor meets strict manufacturing standards for durability and performance, making it a reliable replacement for factory-installed components on compatible vehicles.

Product Description and Specifications

The Walker 250-22003 oxygen sensor features a threaded mounting type with an 18.0 mm thread diameter, allowing for secure installation in the exhaust system. Its 16.46-inch wiring harness and 20.0-inch overall length provide adequate reach for proper connection. The sensor uses a 20 gauge wire and includes two wires with a male radiused polygon connector, ensuring compatibility with the vehicle’s wiring harness. As a non-heated sensor, it is designed for specific applications where heated sensors are not required.

Compatible Vehicles and Applications

• Geo Celica
• Toyota Celica
• Toyota Corolla
• Toyota MR2
• Geo Prizm

This oxygen sensor is engineered for specific fitment on these models, providing accurate air-fuel mixture readings to support emission control systems and engine management.

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor failure
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor malfunction

Installation Notes and Tips

Ensure the vehicle is cool before installation to avoid burns. Use the correct tools to remove the old sensor and install the Walker 250-22003 oxygen sensor by threading it securely into place. Verify the connector matches the male radiused polygon shape and connect the wiring harness firmly. Avoid over-tightening the sensor to prevent damage to the threads.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet or exceed OEM specifications. While specific warranty details for part number 250-22003 should be confirmed at the point of purchase, Walker typically offers coverage against defects in materials and workmanship to ensure reliable operation.