Walker 250-54131 Oxygen Sensor - Upstream

Overview of Walker OE Base Sensor 250-54131

The Walker OE Base Sensor 250-54131 is a heated wide-band oxygen sensor designed specifically for select Lexus and Toyota models. Engineered to provide accurate emissions data, this sensor supports optimal engine performance and helps maintain compliance with emission standards.

• Heated wide-band oxygen sensor for precise air-fuel ratio monitoring
• Specific fit for Lexus and Toyota Corolla, UX200, and UX250h models
• 4-wire design with pin terminal type and square female connector
• Thread size M18 - 1.5 with 22mm wrench size for installation
• OE Base Sensor product line ensuring quality and compatibility

Detailed Product Features and Specifications

This Walker oxygen sensor features a heated element to ensure rapid sensor activation and accurate readings even during cold starts. The wide-band sensor type allows for a broader measurement range of oxygen levels in the exhaust, improving engine control and emissions management. The sensor includes a 4-wire configuration with male terminals and a female square-shaped connector, designed for a specific fit rather than universal application. The thread size is M18 - 1.5, compatible with the exhaust ports of the listed Lexus and Toyota vehicles. Installation requires a 22mm wrench, facilitating straightforward replacement.

Walker OE Base Sensor Product Line

The OE Base Sensor line by Walker focuses on delivering original equipment quality sensors that meet or exceed factory specifications. This product line emphasizes precise fitment and reliable performance, making it suitable for direct replacement in vehicles like the Toyota Corolla and Lexus UX series. The 250-54131 part number is part of this line, ensuring compatibility and durability consistent with OEM standards.

Applications and Common Issues Addressed

• Restores accurate oxygen sensing for improved fuel efficiency
• Helps resolve engine performance issues related to faulty sensors
• Reduces emissions by providing correct air-fuel mixture data
• Eliminates check engine light triggers caused by sensor failure
• Supports smooth operation of Lexus UX200, UX250h, and Toyota Corolla models

Installation Notes and Tips

When installing the Walker 250-54131 oxygen sensor, ensure the vehicle is cool to avoid burns. Use a 22mm wrench to remove the old sensor and install the new one with the M18 - 1.5 thread size. Confirm the connector’s square female shape matches the vehicle harness and that the 4-pin terminal aligns correctly. Avoid over-tightening to prevent damage to the sensor or exhaust manifold.

Quality Assurance and Warranty

Walker OE Base Sensor products are manufactured to meet stringent quality standards, ensuring reliable operation and longevity. While specific warranty details for part number 250-54131 are not provided here, Walker typically offers coverage against manufacturing defects. Refer to the product documentation or manufacturer for exact warranty terms.