Walker 250-54004 Oxygen Sensor - Upstream

Overview of Walker 250-54004 Oxygen Sensor for Saab and Subaru

The Walker 250-54004 oxygen sensor is designed specifically for select Saab and Subaru models, including the Saab 9-2X and Subaru Impreza. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated oxygen sensor with 4-wire configuration for precise readings
• Specific fit for Saab 9-2X and Subaru Impreza models
• 28.66-inch wiring harness length for flexible installation
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wire gauge measurement of 20 for durability and signal integrity
• Overall length of 32.2 inches to accommodate vehicle design

Detailed Features and Specifications

This Walker Products OE oxygen sensor (part number 250-54004) is engineered with a heated sensor type to provide faster warm-up times and more reliable emissions data. The 4-wire design includes two wires for the heating element and two for the sensor signal, ensuring consistent performance. The wiring harness length of 28.66 inches allows for proper routing within the engine bay, while the 20-gauge wire ensures durability and resistance to electrical interference.

The sensor’s threaded mounting type with an 18.0 mm diameter fits securely into the exhaust system, maintaining a tight seal to prevent leaks. The radiused polygon male connector is designed for a specific fit, reducing the risk of connection issues during installation. With an overall length of 32.2 inches, this sensor is tailored to the dimensions required by Saab 9-2X and Subaru Impreza vehicles.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed factory specifications. This oxygen sensor is part of that line, ensuring compatibility and reliable performance for emission control systems in Saab and Subaru vehicles. Using a Walker Products OE sensor helps maintain the integrity of the vehicle’s emissions system and supports compliance with environmental regulations.

Common Applications and Problem Resolution

• Restores accurate oxygen level readings for improved fuel efficiency
• Resolves check engine light issues related to oxygen sensor faults
• Helps correct rough idling or engine hesitation caused by faulty sensors
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents potential damage to catalytic converters from incorrect sensor data

Installation Notes and Tips

When installing the Walker 250-54004 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector shape and gender match the vehicle’s wiring harness before installation. Properly route the wiring harness to prevent contact with hot or moving parts. Torque the sensor to manufacturer specifications to ensure a secure fit and prevent exhaust leaks.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. This part number 250-54004 undergoes rigorous testing to comply with emissions control requirements. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship to support long-term use in Saab and Subaru vehicles.