Walker 250-23509 Oxygen Sensor - Upstream

Overview of Walker 250-23509 Oxygen Sensor

The Walker 250-23509 oxygen sensor is designed specifically for select Mercury and Nissan vehicles, including the Maxima, Quest, and Villager models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

• Heated sensor type for faster response times
• Specific fit for Mercury Maxima, Nissan Quest, and Villager
• Threaded mounting type with 12.0 mm thread diameter
• 26.1-inch wiring harness length with 3 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Overall length of 29.65 inches for proper installation

Walker Products OE Brand Line Details

This oxygen sensor is part of the Walker Products OE line, which focuses on providing original equipment quality parts designed to meet or exceed factory specifications. The Walker Products OE line ensures compatibility and reliable performance for emission control components, making it a suitable replacement for the original sensor in Mercury and Nissan vehicles.

Detailed Product Description

The Walker 250-23509 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Its specific fitment for Mercury Maxima, Nissan Quest, and Villager models guarantees proper installation and function. The sensor includes a 26.1-inch wiring harness with three 20-gauge wires, ensuring a stable electrical connection. The radiused polygon male connector and threaded mounting type with a 12.0 mm thread diameter provide secure attachment and compatibility with the vehicle’s exhaust system. With an overall length of 29.65 inches, this sensor is designed to fit precisely in the designated location.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel mixture for efficient combustion
• Reduces harmful emissions by accurately monitoring oxygen levels
• Prevents engine performance issues related to faulty sensors
• Resolves check engine light triggers caused by oxygen sensor faults
• Improves fuel economy by providing accurate feedback to the engine control unit

Installation Notes and Tips

When installing the Walker 250-23509 oxygen sensor, ensure the vehicle is compatible with this specific part number. Use appropriate tools to avoid damaging the threaded mounting. Verify the connector shape and gender match the vehicle’s wiring harness for a secure fit. It is recommended to replace the sensor when the engine is cool to prevent burns and to apply anti-seize compound on the threads if not pre-applied.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. This part number 250-23509 undergoes rigorous testing to comply with emission control requirements. Warranty details are provided by the manufacturer and typically cover defects in materials and workmanship.