Walker 250-25101 Oxygen Sensor - Upstream

Overview of Walker 250-25101 Oxygen Sensor for Mazda Vehicles

The Walker 250-25101 oxygen sensor is designed specifically for select Mazda models, including the Mazda 3, Mazda 6, CX-5, CX-9, MX-5, and MX-5 Miata. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data.

• Heated oxygen sensor type for faster response times
• Specific fit for Mazda 3, 6, CX-5, CX-9, MX-5, and MX-5 Miata
• Threaded mounting type with 18.0 mm thread diameter
• 14.29-inch wiring harness length with 5 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Overall length of 17.83 inches for proper fitment

Detailed Features and Specifications

This Walker oxygen sensor (part number 250-25101) features a heated sensor element that allows it to reach operating temperature quickly, improving emissions control efficiency. The sensor is designed with a threaded mounting type and an 18.0 mm thread diameter, ensuring a secure and precise installation. The wiring harness length measures 14.29 inches and includes five 20-gauge wires, providing reliable electrical connectivity. The connector is a radiused polygon shape with a male gender, designed to match the factory wiring harness on compatible Mazda models. The overall length of 17.83 inches supports proper placement within the exhaust system.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with factory-installed components. Using a Walker Products OE sensor helps maintain the integrity of your vehicle’s emission control system.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for Mazda 3, 6, CX-5, CX-9, MX-5, and MX-5 Miata
• Resolves check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing precise sensor data
• Reduces harmful emissions by maintaining proper combustion control
• Prevents rough idling and engine performance problems caused by faulty sensors

Installation Notes and Tips

When installing the Walker 250-25101 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector shape and wire count match the factory harness before installation. Tighten the sensor to the manufacturer’s torque specifications to prevent exhaust leaks.

Quality Assurance and Warranty

Walker oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The 250-25101 part is backed by Walker’s quality assurance protocols, providing confidence in its reliability and fitment for compatible Mazda models.