Walker 350-35118 Oxygen Sensor - Upstream or Upstream Left

Overview of Walker Oxygen Sensor 350-35118 for BMW M2, M3, M4

The Walker 350-35118 oxygen sensor is designed specifically for BMW M2, M3, and M4 models. 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 activation and improved efficiency
• Specific fit for BMW M2, M3, and M4 models
• Threaded mounting type with 18.0 mm thread diameter
• 29.52-inch wiring harness length with 5 wires of 20 gauge
• Radiused polygon male connector for secure and reliable connection
• Overall length of 33.46 inches for proper installation depth

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-35118) is engineered to meet the exact specifications required by BMW M2, M3, and M4 vehicles. Featuring a heated sensor element, it reaches operating temperature quickly, which helps reduce emissions during cold starts. The sensor’s 5-wire configuration and 20-gauge wire ensure stable signal transmission and durability. The radiused polygon male connector provides a precise fit, minimizing the risk of connection issues. With a threaded mounting type and an 18.0 mm thread diameter, installation aligns with OEM standards for these BMW models.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces engine misfires and rough idling caused by faulty sensors
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level readings
• Supports engine performance by ensuring correct sensor feedback

Installation Notes and Tips

When installing the Walker 350-35118 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 29.52-inch wiring harness length allows for flexible routing, but avoid sharp bends or contact with hot exhaust components. Tighten the sensor to manufacturer torque specifications to prevent leaks.

Quality Assurance and Warranty

Walker Products Aftermarket parts are manufactured to meet or exceed OEM standards. The 350-35118 oxygen sensor undergoes rigorous testing to ensure durability and reliable performance in BMW M2, M3, and M4 vehicles. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship, providing confidence in the sensor’s long-term functionality.