Walker 250-24478 Oxygen Sensor - Downstream

Overview of Walker 250-24478 Oxygen Sensor for BMW M3, Z3, Z4

The Walker Products OE 250-24478 oxygen sensor is designed specifically for select BMW models including the M3, Z3, and Z4. 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 oxygen sensor with 4-wire design for reliable operation
• Specific fit for BMW M3, Z3, and Z4 models
• 41.65-inch wiring harness length for proper installation
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wire gauge measurement of 20 for durability and signal integrity
• Overall length of 45.2 inches to accommodate vehicle fitment

Detailed Features and Specifications

This Walker oxygen sensor (part number 250-24478) features a heated sensor type that allows for faster warm-up times and improved sensor responsiveness. The 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance under various operating conditions. The wiring harness length of 41.65 inches provides sufficient reach for installation in the exhaust system of BMW M3, Z3, and Z4 vehicles. The sensor’s threaded mounting type with an 18.0 mm diameter allows for secure and precise placement in the exhaust manifold or pipe. The radiused polygon male connector ensures a reliable electrical connection, reducing the risk of signal loss or corrosion. The wire gauge of 20 balances flexibility and durability for long-term use.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with factory-installed components. Using a Walker Products OE sensor like the 250-24478 helps maintain the integrity of your BMW’s emissions system and engine management.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for BMW M3, Z3, and Z4
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves fuel efficiency by providing precise emissions data
• Reduces harmful exhaust emissions by maintaining proper sensor function
• Prevents engine performance problems caused by faulty oxygen sensors

Installation Notes and Tips

When installing the Walker 250-24478 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector type matches the vehicle harness before installation. The 41.65-inch wiring harness length allows for straightforward routing without excessive tension. After installation, clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and accuracy. This part number 250-24478 comes with a limited warranty that covers defects in materials and workmanship, providing confidence in its long-term reliability for BMW M3, Z3, and Z4 applications.