Walker 250-54078 Oxygen Sensor - Upstream Rear

Overview of Walker 250-54078 Oxygen Sensor for Toyota RAV4

The Walker 250-54078 oxygen sensor is designed specifically for Toyota RAV4 models, providing precise emission control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

• Heated oxygen sensor with 4-wire configuration
• Specific fit for Toyota RAV4 vehicles
• 9.37-inch wiring harness length for optimal routing
• 20 gauge wire for reliable signal transmission
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for secure connection
• Overall length of 12.91 inches for proper fitment

Detailed Features and Specifications

The Walker 250-54078 oxygen sensor is engineered with a heated sensor element to ensure rapid response times and accurate air-fuel mixture readings. Its 4-wire design includes separate heater and signal wires, improving sensor durability and performance. The wiring harness length of 9.37 inches allows for flexible installation within the engine bay, while the 20 gauge wire ensures consistent electrical conductivity. The sensor’s threaded mounting type with an 18.0 mm diameter provides a secure and leak-free fit. Additionally, the radiused polygon male connector is designed to match the factory wiring harness, ensuring compatibility and ease of replacement.

Walker Products OE Brand Line

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality parts that meet or exceed factory specifications. The OE line emphasizes precise fitment and reliable performance, making it suitable for professional repairs and maintenance on Toyota RAV4 vehicles. Using parts from the Walker Products OE line helps maintain vehicle emission standards and engine efficiency.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for proper fuel mixture control
• Resolves engine performance issues related to faulty sensors
• Helps reduce emissions by ensuring correct exhaust gas readings
• Eliminates check engine light triggers caused by sensor failure
• Improves fuel economy by maintaining optimal combustion

Installation Notes and Tips

When installing the Walker 250-54078 oxygen sensor on a Toyota RAV4, ensure the engine is cool to avoid burns. Use the correct socket size for the 18.0 mm threaded sensor to prevent damage. Verify the connector shape and gender match the vehicle’s wiring harness before installation. Properly route the 9.37-inch wiring harness to avoid contact with hot or moving parts. After installation, clear any diagnostic trouble codes and perform a test drive to confirm sensor operation.

Quality Assurance and Warranty

Walker oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable performance. The 250-54078 part number undergoes rigorous testing to comply with emission control requirements. While specific warranty details may vary, Walker Products OE parts typically include coverage against defects in materials and workmanship to support professional repair confidence.