Walker 350-35081 Oxygen Sensor - Upstream

Overview of Walker 350-35081 Oxygen Sensor

The Walker 350-35081 oxygen sensor is designed specifically for select BMW models, including the 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3. This heated oxygen sensor provides accurate emissions control data to help maintain engine performance and fuel efficiency.

• Heated sensor type for faster response times
• Specific fit for BMW 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3 models
• 36.93-inch wiring harness length with 5 wires of 20 gauge
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for secure connection
• Overall length of 40.47 inches for proper installation

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-35081) is engineered to meet the specific requirements of various BMW vehicles. Featuring a heated sensor element, it ensures quicker activation and more reliable readings under a wide range of operating conditions. The sensor includes a 36.93-inch wiring harness with five 20-gauge wires, allowing for precise signal transmission and compatibility with the vehicle’s existing wiring system. The radiused polygon male connector and threaded mounting type with an 18.0 mm thread diameter provide a secure and stable installation, reducing the risk of leaks or disconnections.

Walker Products Aftermarket Line

The Walker Products Aftermarket line focuses on delivering emission control components that meet or exceed OEM specifications. This oxygen sensor is part of that line, designed to provide reliable performance and durability for emission systems in BMW vehicles. The product line emphasizes fitment accuracy and quality construction to support proper engine management and emissions compliance.

Common Applications and Issues Addressed

• Restores accurate oxygen level readings for optimal air-fuel mixture
• Helps resolve rough idling and engine hesitation
• Reduces increased fuel consumption caused by faulty sensors
• Prevents check engine light triggers related to oxygen sensor faults
• Supports emissions system compliance and reduces harmful exhaust gases

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the connector shape and wire count match the vehicle’s harness before installation. Tighten the sensor to the manufacturer’s torque specifications to prevent leaks. It is recommended to inspect the wiring harness for damage and replace if necessary during installation.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards. While specific warranty details for part number 350-35081 should be confirmed with the supplier, Walker typically offers coverage against defects in materials and workmanship. This ensures dependable performance and peace of mind when replacing oxygen sensors on BMW 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3 models.