Walker 250-24638 Oxygen Sensor - Downstream Left or Downstream Right

Overview of Walker 250-24638 Oxygen Sensor

The Walker 250-24638 oxygen sensor is designed specifically for select BMW models, including the 545i, 645Ci, 745i, 745Li, 760i, 760Li, M5, M6, and X5. 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 warm-up and accurate readings
• Specific fit for BMW models listed, ensuring proper compatibility
• 15.28-inch wiring harness length with 4 wires of 20 gauge
• Radiused polygon female connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 18.82 inches for proper installation depth

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 250-24638 oxygen sensor from this line is engineered to provide reliable emissions control performance and durability, matching the standards expected by BMW for their vehicles. This ensures that the sensor integrates seamlessly with the vehicle’s existing systems.

Product Features and Specifications

This oxygen sensor features a heated design, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start. The 4-wire configuration supports both the sensor signal and heater circuit, enhancing sensor responsiveness. The radiused polygon female connector ensures a secure and precise fit, minimizing the risk of connection issues. The threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the designated exhaust port.

Applications and Problem Resolution

• Compatible with BMW 545i, 645Ci, 745i, 745Li, 760i, 760Li, M5, M6, and X5 models
• Helps resolve issues related to poor fuel economy due to inaccurate oxygen readings
• Addresses engine performance problems caused by faulty sensor signals
• Reduces emissions by ensuring proper air-fuel mixture monitoring
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Walker 250-24638 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the radiused polygon female connector is fully seated to prevent electrical issues. Thread the sensor carefully into the exhaust port to avoid cross-threading. Verify wiring harness length and routing to prevent interference with moving parts.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. While specific warranty details for part number 250-24638 should be confirmed at the point of purchase, Walker typically offers coverage against defects in materials and workmanship to support long-term use in BMW vehicles.