Walker 250-24021 Oxygen Sensor - Upstream

Overview of Walker 250-24021 Oxygen Sensor for BMW 525i and 525iT

The Walker 250-24021 oxygen sensor is designed specifically for BMW 525i and 525iT models. This heated oxygen sensor ensures accurate emission control by monitoring exhaust gases and providing essential data to the engine management system.

• Heated oxygen sensor type for faster response times
• Specific fit for BMW 525i and 525iT models
• 53.66 inches wiring harness length for optimal installation
• 20 gauge wire measurement with 4 wires for reliable signal transmission
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon female connector for secure connection
• Overall length of 57.2 inches for proper fitment

Detailed Product Description

The Walker 250-24021 oxygen sensor is a heated sensor designed to provide precise air-fuel mixture readings to the engine control unit (ECU) in BMW 525i and 525iT vehicles. Featuring a 53.66-inch wiring harness and 20 gauge wires, this sensor ensures consistent electrical performance and durability. The sensor’s 4-wire configuration supports heating elements that reduce warm-up time, improving emission control efficiency. Its threaded mounting type with an 18.0 mm diameter allows for secure installation in the exhaust system. The radiused polygon female connector ensures a reliable and corrosion-resistant connection, minimizing the risk of signal loss or failure.

Walker Products OE Brand Line

This oxygen sensor is part of the Walker Products OE line, which focuses on providing original equipment quality parts designed to meet or exceed OEM specifications. The Walker Products OE line ensures compatibility and performance tailored to specific vehicle applications, such as the BMW 525i and 525iT, offering a direct replacement solution for emission control sensors.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient engine performance
• Reduces harmful emissions by providing accurate exhaust gas data
• Prevents engine misfires caused by faulty oxygen sensors
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by enabling precise fuel management

Installation Notes and Tips

When installing the Walker 250-24021 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. Properly route the wiring harness to prevent contact with hot exhaust components or moving parts. Torque the sensor to manufacturer specifications to ensure a secure fit and prevent exhaust leaks.

Quality Assurance and Warranty

Walker oxygen sensors, including part number 250-24021, are manufactured to meet strict quality standards for durability and performance. The product undergoes rigorous testing to ensure reliable operation under various driving conditions. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.