Walker 350-33085 Oxygen Sensor - Upstream

Overview of Walker 350-33085 Oxygen Sensor for BMW 318i and M3

The Walker 350-33085 oxygen sensor is designed specifically for BMW 318i and M3 models, providing precise emission control monitoring. This heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions compliance.

• Heated oxygen sensor with 3-wire configuration
• Specific fit for BMW 318i and M3 models
• 26.3-inch wiring harness length for flexible installation
• 20 gauge wire for reliable signal transmission
• Radiused polygon male connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 29.84 inches for proper fitment

Walker Products Aftermarket Line Details

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing replacement emission control components engineered to meet or exceed OEM specifications. The line emphasizes precise fitment and durability, making it suitable for specific vehicle applications such as the BMW 318i and M3 models.

Product Features and Specifications

The Walker 350-33085 oxygen sensor features a heated sensor element that allows for faster warm-up times and improved sensor response. The 3-wire design includes a dedicated heater circuit to maintain optimal operating temperature. The wiring harness length of 26.3 inches and 20 gauge wire size ensure reliable electrical connectivity. The radiused polygon male connector provides a secure and corrosion-resistant connection, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the exhaust system.

Common Applications and Problem Resolution

• Restores accurate oxygen sensing for BMW 318i and M3 exhaust systems
• Helps resolve engine performance issues related to faulty oxygen sensors
• Reduces emissions by ensuring proper air-fuel mixture readings
• Prevents check engine light triggers caused by sensor failure
• Supports fuel efficiency by maintaining correct sensor operation

Installation Notes and Tips

When installing the Walker 350-33085 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. Verify the connector orientation matches the radiused polygon male connector for a secure fit. Allow the sensor to reach operating temperature before performing diagnostic tests to confirm proper function.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards for durability and performance. The 350-33085 part number undergoes rigorous testing to ensure compatibility with BMW 318i and M3 models. Warranty coverage details should be confirmed with the product documentation or supplier.