Walker 250-23031 Oxygen Sensor - Upstream

Overview of Walker 250-23031 Oxygen Sensor for BMW 318i and M3

The Walker 250-23031 oxygen sensor is designed specifically for BMW 318i and M3 models, providing precise emission control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

• Heated oxygen sensor for accurate emissions monitoring
• Specific fit for BMW 318i and M3 models
• 26.3-inch wiring harness length with 20 gauge wire
• Three-wire configuration with radiused polygon male connector
• Threaded mounting with 18.0 mm thread diameter
• Overall length of 29.84 inches for proper fitment

Detailed Features and Specifications

This Walker Products OE oxygen sensor (part number 250-23031) is engineered with a 26.3-inch wiring harness and 20 gauge wire to ensure reliable electrical connectivity. The sensor type is heated, which allows it to reach operating temperature quickly for faster and more accurate readings. It includes three wires and a radiused polygon male connector designed to match the original equipment specifications for BMW 318i and M3 vehicles. The threaded mounting type with an 18.0 mm thread diameter ensures a secure and proper fit in the exhaust system. The overall length of 29.84 inches accommodates the specific installation requirements of these BMW models.

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 oxygen sensor is part of that line, ensuring compatibility and performance consistent with factory-installed parts. Using Walker Products OE parts helps maintain the integrity of your BMW 318i or M3’s emission system and supports compliance with environmental regulations.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for optimal fuel mixture control
• Helps resolve check engine light issues related to oxygen sensor faults
• Improves engine performance by providing precise exhaust gas readings
• Reduces emissions by ensuring proper catalytic converter function
• Prevents drivability problems caused by faulty sensor signals

Installation Notes and Tips

When installing the Walker 250-23031 oxygen sensor, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Verify the connector matches the radiused polygon male shape for a secure electrical connection. Proper routing of the 26.3-inch wiring harness is important to avoid heat damage or interference with moving parts.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards and are tested for durability and performance. This part number 250-23031 is backed by Walker’s quality assurance processes to ensure reliable operation in BMW 318i and M3 vehicles. Please refer to Walker’s warranty policy for specific coverage details.