Walker 250-21054 Oxygen Sensor - Upstream

Overview of Walker 250-21054 Oxygen Sensor for Lexus and Toyota

The Walker 250-21054 oxygen sensor is designed specifically for select Lexus and Toyota models, including the GS300, MR2, SC300, and Supra. This non-heated oxygen sensor ensures accurate emission control and optimal engine performance by monitoring exhaust gases.

• Wiring harness length: 15.28 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non-heated oxygen sensor
• Specific fit for Lexus and Toyota models
• Single wire configuration
• Radiused polygon male connector
• Thread diameter: 18.0 mm
• Overall length: 18.82 inches
• Flange mount installation

Walker Products OE Line Details

This oxygen sensor is part of the Walker Products OE line, which focuses on providing original equipment quality parts that meet or exceed factory specifications. The Walker Products OE line ensures compatibility and reliable performance for emission control components like oxygen sensors, making it a suitable replacement for the 250-21054 part number in Lexus and Toyota vehicles.

Product Description and Specifications

The Walker 250-21054 oxygen sensor features a non-heated design with a single 20-gauge wire, making it a direct fit for specific Lexus and Toyota models. Its 15.28-inch wiring harness and 18.82-inch overall length provide the necessary reach and flexibility for proper installation. The sensor uses a radiused polygon male connector and mounts securely with an 18.0 mm thread diameter flange mount. This precise fitment ensures accurate exhaust gas readings, which are critical for maintaining emission standards and engine efficiency.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel mixture for Lexus GS300 and Toyota Supra engines
• Prevents check engine light triggers related to oxygen sensor faults
• Reduces emissions by providing accurate exhaust gas data
• Improves fuel economy by ensuring correct sensor feedback
• Supports smooth engine performance in Toyota MR2 and SC300 models

Installation Notes and Tips

When installing the Walker 250-21054 oxygen sensor, ensure the flange mount is securely tightened to prevent exhaust leaks. Verify the radiused polygon male connector matches the vehicle’s wiring harness for a proper electrical connection. Handle the sensor carefully to avoid damaging the wire or connector. It is recommended to use anti-seize compound on the threads to facilitate future removal.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet original equipment standards, ensuring reliable performance and durability. The 250-21054 part number undergoes rigorous testing to comply with emission control requirements. Warranty coverage details should be confirmed with the distributor or retailer, as they may vary.