Walker 250-21003 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Overview of Walker Products OE Oxygen Sensor 250-21003

The Walker Products OE Oxygen Sensor 250-21003 is designed specifically for select Ford, Lincoln, and Mercury vehicles. This non-heated oxygen sensor ensures accurate emission control by monitoring exhaust gases, helping maintain optimal engine performance and compliance with emission standards.

• Wiring harness length: 4.45 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non-heated
• Specific fit for select Ford, Lincoln, and Mercury models
• Single wire configuration
• Radiused polygon female connector
• Thread diameter: 18.0 mm
• Overall length: 7.99 inches
• Threaded mounting type

Walker Products OE Brand Line Details

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed factory specifications. This oxygen sensor from the Walker Products OE range is engineered to provide reliable performance and precise fitment for specific vehicle applications, including models like the Ford Mustang, Lincoln Continental, and Mercury Cougar.

Product Description and Fitment

This oxygen sensor (part number 250-21003) is a non-heated sensor designed with a 20 gauge single wire and a radiused polygon female connector, ensuring a secure and accurate connection. Its 4.45-inch wiring harness length and 7.99-inch overall length provide the correct reach and fit for threaded mounting in compatible vehicles. The sensor is specifically made for Ford, Lincoln, and Mercury models such as the Ford Bronco, Mustang, Ranger, and Econoline series, as well as the Lincoln Town Car and Mercury Marquis.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel mixture for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level readings
• Prevents engine performance issues related to faulty oxygen sensors
• Resolves check engine light triggers caused by sensor failure
• Supports smooth engine idling and acceleration

Installation Notes and Tips

Installation requires removing the old oxygen sensor and threading the Walker 250-21003 sensor into the exhaust manifold or pipe. Ensure the connector matches the vehicle’s wiring harness for a secure fit. Use appropriate tools to avoid damaging the 18.0 mm threaded sensor. Verify sensor wiring and connector orientation before final installation to prevent electrical issues.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet original equipment standards, ensuring durability and reliable performance. While specific warranty details are not provided here, Walker typically offers coverage against defects in materials and workmanship. Refer to product documentation or manufacturer resources for exact warranty terms.