Walker 250-25044 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Overview of Walker Products OE Oxygen Sensor 250-25044

The Walker Products OE Oxygen Sensor 250-25044 is designed specifically for select BMW, Mercedes-Benz, and Mini models. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle’s engine management system.

• Heated sensor type for faster response times
• Specific fit for BMW 550i, 650i, 750i, 750Li, 760Li, M5, M6, X5 models
• Compatible with Mercedes-Benz C300, C350e, CLS550, E300, G550, GLC300, GLC350e, ML450, SL450, SL550, SLC43 AMG, SLC300, SLK300, SLK350
• Fits Mini Cooper models
• Threaded mounting with 18.0 mm thread diameter
• 25.12 inches wiring harness length with 5 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Overall length of 28.66 inches for proper installation

Walker Products OE Brand Line Details

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. The 250-25044 oxygen sensor is engineered to provide reliable emissions control and durability, maintaining the performance standards expected by BMW, Mercedes-Benz, and Mini vehicles. This product line emphasizes precise fitment and compatibility, ensuring seamless integration with the vehicle’s existing systems.

Product Features and Technical Specifications

This oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emissions accuracy shortly after engine start. The 5-wire design supports both sensor heating and signal transmission, while the 20 gauge wire ensures durability and resistance to electrical interference. The radiused polygon male connector provides a secure and stable connection to the vehicle’s wiring harness. Threaded mounting with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Common Applications and Problem Resolution

• Helps resolve rough idling and engine hesitation caused by faulty oxygen sensors
• Reduces increased emissions and failed emissions tests
• Improves fuel efficiency by providing accurate air-fuel ratio data
• Prevents check engine light triggers related to oxygen sensor faults
• Supports proper catalytic converter function by maintaining correct sensor feedback

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Use appropriate tools to remove the old sensor and install the Walker 250-25044 sensor, threading it securely without over-tightening. Verify the connector matches the radiused polygon male design for proper fit. Route the wiring harness carefully to avoid contact with hot exhaust components or moving parts. After installation, clear any diagnostic trouble codes and perform a test drive to confirm sensor operation.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The 250-25044 part number undergoes rigorous testing to comply with OEM specifications for BMW, Mercedes-Benz, and Mini vehicles. Please refer to Walker’s official documentation for warranty details applicable to this oxygen sensor.