Walker 250-25102 Oxygen Sensor - Upstream

Overview of Walker 250-25102 Oxygen Sensor for Mazda, Scion, and Toyota

The Walker 250-25102 oxygen sensor is a heated, threaded sensor designed specifically for select Mazda, Scion, and Toyota models. This sensor ensures accurate emission control by monitoring exhaust gases and providing essential data to the engine management system.

• Heated oxygen sensor with 5 wires for precise readings
• Specific fit for Mazda CX-3, CX-5, Scion iA, Toyota Yaris, and Yaris iA
• 22.17-inch wiring harness length with 20-gauge wire
• Radiused polygon male connector for secure connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length of 25.71 inches for proper installation

Detailed Features and Specifications

This Walker Products OE oxygen sensor (part number 250-25102) is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. The sensor includes a 22.17-inch wiring harness made with 20-gauge wire, supporting reliable electrical conductivity. Its radiused polygon male connector ensures a secure and precise fit, reducing the risk of connection issues. The threaded mounting type with an 18.0 mm diameter allows for straightforward installation in compatible exhaust systems. The overall length of 25.71 inches accommodates proper placement within the vehicle's emission control system.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering emission control components that meet or exceed original equipment specifications. This oxygen sensor is part of that line, designed to provide reliable performance and durability for specific vehicle applications. Using Walker Products OE parts helps maintain factory-level emission standards and engine efficiency.

Applications and Common Issues Addressed

• Restores accurate oxygen sensing for improved fuel economy
• Helps resolve check engine light triggers related to oxygen sensor faults
• Reduces emissions by ensuring proper air-fuel mixture readings
• Prevents rough idling and engine hesitation caused by faulty sensors
• Supports optimal catalytic converter function by providing correct data

Installation Notes and Tips

When installing the Walker 250-25102 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Verify the connector matches the radiused polygon male shape for a secure fit. Properly route the 22.17-inch wiring harness to avoid contact with hot exhaust components or moving parts.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain compliance with emission regulations and supports long-term vehicle reliability.