Walker 250-25133 Oxygen Sensor - Upstream Left or Upstream Right

Overview of Walker 250-25133 Oxygen Sensor for BMW Models

The Walker Products OE 250-25133 oxygen sensor is designed specifically for select BMW vehicles, including the 750i, 750i xDrive, and M550i xDrive. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the engine management system.

• Heated oxygen sensor type for faster response times
• Specific fit for BMW 750i, 750i xDrive, and M550i xDrive models
• 35.94-inch wiring harness length for proper installation
• 20 gauge wire measurement with 5 wires for reliable signal transmission
• Female connector gender with 18mm thread diameter
• Overall length of 39.49 inches for compatibility with OEM mounting points

Walker Products OE Line and Its Relevance

The Walker Products OE line focuses on delivering emission control components that meet or exceed original equipment specifications. The 250-25133 oxygen sensor is part of this line, ensuring it matches the fit, form, and function required by BMW vehicles. This alignment with OE standards supports consistent vehicle performance and emissions compliance.

Detailed Product Description

This oxygen sensor features a heated design, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions during cold starts. The sensor’s 5-wire configuration and 20 gauge wiring provide stable and accurate signal transmission to the engine control unit. With a wiring harness length of 35.94 inches and an overall length of 39.49 inches, the sensor is engineered for precise fitment in BMW 750i, 750i xDrive, and M550i xDrive models. The female connector and 18mm thread diameter ensure secure and proper installation in the vehicle’s exhaust system.

Common Applications and Issues Addressed

• Helps maintain optimal air-fuel ratio for efficient combustion
• Reduces engine misfires and rough idling caused by faulty sensors
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level readings
• Resolves check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Walker 250-25133 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Verify the connector gender matches the vehicle’s harness before installation. Proper torque should be applied to the 18mm threaded sensor to prevent exhaust leaks. It is recommended to inspect the wiring and connector for any damage during replacement.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The 250-25133 part number undergoes rigorous testing to comply with OEM specifications for BMW vehicles. Warranty coverage details should be confirmed with the product documentation or supplier.