Walker 250-54069 Oxygen Sensor - Upstream or Upstream Front

Overview of Walker 250-54069 Oxygen Sensor for Lexus RX350 and Scion xB

The Walker 250-54069 oxygen sensor is designed specifically for select Lexus and Scion models, including the RX350 and xB. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine control unit.

• Heated oxygen sensor with 4-wire design for reliable operation
• Specific fitment for Lexus RX350 and Scion xB models
• 15.28-inch wiring harness length for convenient 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 18.82 inches to accommodate vehicle-specific routing

Walker Products OE Line and Part Specifications

This oxygen sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality components tailored to exact vehicle specifications. The 250-54069 sensor meets stringent standards for fit, form, and function, ensuring compatibility and performance consistent with factory-installed parts. The heated sensor type enhances warm-up times and emissions control, critical for maintaining compliance with environmental regulations.

Detailed Product Description

The Walker 250-54069 oxygen sensor features a 4-wire heated design that allows for faster sensor activation and improved accuracy in measuring exhaust oxygen levels. Its 15.28-inch wiring harness length and radiused polygon male connector provide a secure and precise fit for the Lexus RX350 and Scion xB. The threaded mounting type with an 18.0 mm diameter ensures proper installation and sealing within the exhaust system. The 20-gauge wire measurement supports reliable electrical conductivity and durability under high-temperature conditions. Overall, the sensor’s 18.82-inch length accommodates the specific routing requirements of the targeted vehicle models.

Common Applications and Issues Addressed

• Helps maintain optimal air-fuel ratio for efficient engine performance
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine misfires and rough idling caused by faulty sensors
• Supports proper functioning of catalytic converters
• Resolves check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Walker 250-54069 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 18.0 mm threaded sensor to prevent damage. Verify the radiused polygon male connector aligns properly with the vehicle’s wiring harness to ensure a secure connection. Avoid twisting or stretching the 15.28-inch wiring harness during installation to maintain sensor integrity. It is recommended to clear any diagnostic trouble codes after installation to reset the engine control unit.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. While specific warranty details for part number 250-54069 should be confirmed with the supplier, Walker typically offers coverage against defects in materials and workmanship to support long-term use in Lexus RX350 and Scion xB vehicles.