Walker 250-25042 Oxygen Sensor - Downstream, Upstream, Upstream Left or Upstream Right

Overview of Walker Products OE Oxygen Sensor 250-25042

The Walker Products OE Oxygen Sensor 250-25042 is designed for precise emission control in select BMW, Jeep, Mercedes-Benz, Mini, and Smart vehicles. This heated oxygen sensor features a specific fitment to ensure optimal performance and compatibility with various models including the BMW 328d xDrive and Mercedes AMG GT series.

• Heated oxygen sensor for accurate emissions monitoring
• Specific fitment for select BMW, Jeep, Mercedes-Benz, Mini, and Smart models
• 12.32-inch wiring harness length with 5 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 15.87 inches for proper installation

Detailed Product Features and Specifications

This Walker oxygen sensor (part number 250-25042) is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. The 12.32-inch wiring harness and 5-wire configuration with 20 gauge wire ensure reliable electrical connectivity. The radiused polygon male connector is designed for a secure and precise fit, reducing the risk of connection issues. The sensor mounts via a threaded 18.0 mm diameter fitting, compatible with the exhaust system of specific vehicle models. Its overall length of 15.87 inches allows for proper placement within the exhaust stream.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering original equipment quality emission control components. This oxygen sensor is part of that line, ensuring it meets or exceeds OEM specifications for fit, form, and function. The OE designation indicates that this sensor is designed to match the performance and durability standards required by the original vehicle manufacturers, making it suitable for professional repairs and maintenance.

Applications and Common Issues Addressed

• Restores accurate oxygen sensing for improved engine performance
• Resolves check engine light triggers related to oxygen sensor faults
• Helps correct poor fuel economy caused by faulty sensor readings
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents rough idling and engine hesitation linked to sensor failure

Installation Notes and Tips

Installation requires removal of the old oxygen sensor and threading the Walker 250-25042 sensor into the exhaust port. Ensure the connector matches the radiused polygon male type for proper electrical connection. Use appropriate tools to avoid damaging the 18.0 mm threaded fitting. Verify wiring harness length and routing to prevent strain or interference with other components. It is recommended to follow vehicle-specific service manuals for torque specifications and sensor location.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards. This part number 250-25042 undergoes rigorous testing to ensure durability and reliable operation under normal driving conditions. While specific warranty details are not provided here, Walker typically offers coverage consistent with OEM replacement parts, supporting professional-grade repairs.