Walker 250-54064 Oxygen Sensor - Upstream

Overview of Walker 250-54064 Oxygen Sensor for Subaru Vehicles

The Walker 250-54064 oxygen sensor is designed specifically for select Subaru models including the Forester, Impreza, Legacy, and Outback. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fit for Subaru Forester, Impreza, Legacy, and Outback
• Threaded mounting type with 18.0 mm thread diameter
• Connector features a radiused polygon shape with male gender
• Wiring harness length of 8.39 inches and overall length of 11.93 inches
• Wire gauge measurement of 20 for durability and signal integrity

Detailed Product Description

This Walker Products OE oxygen sensor (part number 250-54064) is engineered to meet the exact specifications required by Subaru vehicles. The heated sensor type allows for faster warm-up times, improving emissions control during cold starts. Featuring a 4-wire configuration, it provides accurate oxygen level readings to the engine control unit. The sensor’s threaded mounting type with an 18.0 mm diameter ensures secure installation in the exhaust system. The connector’s radiused polygon shape and male gender design facilitate a precise and secure electrical connection. With a wiring harness length of 8.39 inches and an overall length of 11.93 inches, this sensor fits perfectly in the designated locations on Subaru Forester, Impreza, Legacy, and Outback models.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed factory standards. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with Subaru’s original components. Using Walker Products OE parts helps maintain vehicle emissions compliance and engine efficiency.

Common Applications and Issues Addressed

• Helps resolve rough idling caused by incorrect air-fuel mixture readings
• Reduces engine hesitation and stalling related to faulty oxygen sensors
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate exhaust gas data
• Eliminates check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

Installation of the Walker 250-54064 oxygen sensor requires proper threading into the exhaust manifold or pipe. Ensure the sensor is tightened to manufacturer torque specifications to avoid leaks. The 4-wire connector with a radiused polygon shape must be securely connected to the vehicle’s wiring harness. It is recommended to inspect the wiring harness for damage before installation. Use anti-seize compound on the threads if specified by the vehicle manufacturer to facilitate future removal.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards for durability and performance. This part number 250-54064 undergoes rigorous testing to ensure reliable operation in Subaru Forester, Impreza, Legacy, and Outback models. Warranty coverage details should be confirmed with the original equipment manufacturer or authorized distributor.