Walker 250-25047 Oxygen Sensor - Upstream or Upstream Rear

Overview of Walker 250-25047 Oxygen Sensor for BMW Models

The Walker Products OE 250-25047 oxygen sensor is designed specifically for select BMW vehicles, including the 1 Series M, 135i, 335i, 335is, 335i xDrive, 335xi, 535i, 535i xDrive, 535xi, X6, and Z4. This heated oxygen sensor provides precise emissions control by accurately monitoring exhaust gases to optimize engine performance and fuel efficiency.

• Heated oxygen sensor with 5-wire configuration for reliable operation
• Specific fit for BMW models ensuring proper installation and function
• 44.8-inch wiring harness length with 20-gauge wire for durability
• Threaded mounting type with 18.0 mm thread diameter for secure attachment
• Radiused polygon male connector for exact OEM compatibility
• Overall length of 48.35 inches to accommodate factory routing

Detailed Product Features and Specifications

This Walker 250-25047 oxygen sensor is a heated sensor type, which allows it to reach operating temperature quickly, improving emissions control during cold starts. The sensor includes a 5-wire design, which supports both the sensor signal and heater circuit, enhancing responsiveness and durability. The wiring harness length of 44.8 inches and 20-gauge wire gauge measurement provide sufficient length and strength for installation in the specified BMW models. The sensor’s threaded mounting type with an 18.0 mm thread diameter ensures a secure and leak-free fit in the exhaust system. The radiused polygon male connector matches the original equipment specifications, facilitating a straightforward plug-and-play replacement.

Walker Products OE Brand Line Information

The Walker Products OE line focuses on delivering direct-fit emission control components that meet or exceed original equipment standards. This product line emphasizes precise fitment and reliable performance, making the 250-25047 oxygen sensor a suitable replacement part for maintaining factory-level emissions control and engine efficiency in BMW vehicles.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for optimal air-fuel mixture control
• Helps resolve check engine light triggers related to oxygen sensor faults
• Improves fuel economy by ensuring proper sensor feedback
• Reduces harmful emissions by maintaining correct exhaust gas readings
• Prevents rough idling and engine hesitation caused by faulty sensors

Installation Notes and Tips

Installation of the Walker 250-25047 oxygen sensor requires removal of the old sensor from the threaded mounting point in the exhaust system. Ensure the connector matches the radiused polygon male design for proper connection. Use appropriate tools to avoid damaging the 18.0 mm thread diameter during installation. Verify wiring harness routing to prevent contact with hot or moving components. It is recommended to check for any exhaust leaks after installation to maintain sensor accuracy.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet stringent quality standards for durability and performance. While specific warranty details for part number 250-25047 should be confirmed with the supplier, Walker typically offers coverage against defects in materials and workmanship to support long-term reliability in BMW applications.