Walker 250-21012 Oxygen Sensor - Upstream

Overview of Walker Products OE Oxygen Sensor 250-21012

The Walker Products OE 250-21012 oxygen sensor is designed specifically for select Ford, Mazda, and Mercury vehicles. This non-heated oxygen sensor provides precise emissions control by accurately monitoring exhaust gases, helping maintain optimal engine performance and fuel efficiency.

• Wiring harness length: 23.35 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non-heated oxygen sensor
• Specific fit for Ford, Mazda, and Mercury models
• Single wire configuration with radiused polygon female connector
• Thread diameter: 18.0 mm with threaded mounting
• Overall length: 26.89 inches

Detailed Product Description

This oxygen sensor from Walker Products OE is engineered to meet the exact specifications of various Ford, Mazda, and Mercury vehicles, including models such as the Ford Probe, Mazda MX-6, Mercury Capri, and others like the 323, 626, B2600, and Tracer. The sensor features a non-heated design with a single 20-gauge wire, ensuring compatibility with the vehicle’s original wiring harness. The radiused polygon female connector and 18.0 mm threaded mounting provide a secure and precise fit, facilitating straightforward installation and reliable operation.

The wiring harness length of 23.35 inches and overall length of 26.89 inches are optimized for the specific routing and placement in the compatible vehicles, reducing the risk of wiring strain or damage. This sensor is part of the Walker Products OE line, which focuses on delivering original equipment quality parts that match factory specifications for fit, form, and function.

Walker Products OE Line Information

The Walker Products OE line is dedicated to providing emission control components that meet or exceed original equipment standards. This oxygen sensor is manufactured to ensure consistent performance and durability, aligning with the quality expectations of the original vehicle manufacturers. Choosing a Walker Products OE sensor helps maintain the integrity of your vehicle’s emissions system and supports compliance with environmental regulations.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for improved fuel economy
• Helps resolve engine performance issues related to faulty sensors
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents check engine light triggers caused by sensor failure
• Supports smooth engine idling and acceleration

Installation Notes and Tips

Installation requires removal of the old oxygen sensor and threading the Walker 250-21012 sensor into the exhaust manifold or pipe. The 18.0 mm threaded mounting ensures a secure fit. Care should be taken to connect the radiused polygon female connector properly to avoid wiring damage. Verify the wiring harness length and routing to prevent interference with other engine components. 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 strict quality control standards. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain compliance with emissions standards and supports the longevity of your vehicle’s emission control system.