Walker 250-21019 Oxygen Sensor - Upstream

Overview of Walker Products OE Oxygen Sensor 250-21019

The Walker Products OE 250-21019 oxygen sensor is designed specifically for select Ford and Mazda vehicles, including the B2600, Festiva, and RX-7 models. This non-heated oxygen sensor features a threaded mounting type and a radiused polygon female connector, ensuring precise fitment and reliable performance.

• Wiring harness length: 12.32 inches
• Wire gauge measurement: 20 gauge
• Sensor type: Non-heated oxygen sensor
• Specific fit for Ford and Mazda models
• Connector shape: Radiused polygon with female gender
• Thread diameter: 18.0 mm
• Overall length: 15.87 inches
• Mounting type: Threaded
• Single wire configuration

Detailed Product Description

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed factory specifications. The 250-21019 oxygen sensor is engineered to provide accurate air-fuel mixture readings for optimal engine performance and emissions control. Its non-heated design and 20-gauge wire ensure compatibility with the vehicle’s existing wiring harness, while the 18.0 mm threaded mounting allows for secure installation. The radiused polygon female connector is designed for a specific fit, reducing the risk of connection issues in Ford B2600, Mazda Festiva, and RX-7 models.

Applications and Common Issues Addressed

• Helps correct inaccurate oxygen readings that cause poor fuel economy
• Resolves engine hesitation or rough idling related to faulty sensors
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents check engine light triggers related to oxygen sensor faults
• Supports smooth engine performance in Ford B2600, Mazda Festiva, and RX-7 vehicles

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old sensor to avoid burns
• Use appropriate tools for the 18.0 mm threaded sensor to prevent damage
• Verify connector compatibility with the radiused polygon female plug
• Check wiring harness length (12.32 inches) to confirm fitment in the engine bay
• Follow vehicle-specific service manual instructions for sensor replacement

Quality Assurance and Warranty

Walker Products OE parts are manufactured to meet original equipment standards, providing reliable performance and durability. The 250-21019 oxygen sensor undergoes rigorous quality control to ensure consistent operation. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship, supporting long-term vehicle emissions compliance.