Walker 350-33087 Oxygen Sensor - Downstream or Upstream

Overview of Walker Oxygen Sensor 350-33087

The Walker 350-33087 oxygen sensor is designed specifically for Subaru Forester, Impreza, and Legacy 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 response times
• Specific fit for Subaru Forester, Impreza, and Legacy
• 15.28-inch wiring harness length for proper installation
• 20 gauge wire measurement with 3 wires for reliable signal transmission
• Radiused polygon male connector for secure connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length of 18.82 inches for correct positioning

Detailed Product Description

This Walker oxygen sensor (part number 350-33087) is engineered to meet the exact specifications required by Subaru Forester, Impreza, and Legacy vehicles. Featuring a heated sensor element, it quickly reaches operating temperature to provide accurate oxygen level readings, which are critical for maintaining efficient combustion and reducing harmful emissions. The sensor includes a 15.28-inch wiring harness with 20 gauge wires and a radiused polygon male connector, ensuring a secure and reliable electrical connection. Its threaded mounting type with an 18.0 mm diameter allows for straightforward installation and proper sealing in the exhaust system.

Walker Products Aftermarket offers this sensor as part of their emission control sensor line, focusing on delivering components that meet or exceed OEM standards. This product line emphasizes precise fitment and durability, making it suitable for specific vehicle applications like the Subaru models listed.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Helps resolve check engine light codes related to oxygen sensor failure
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunctions

Installation Notes and Tips

• Ensure the vehicle is cool before removing the old sensor to avoid burns
• Use appropriate tools for threaded sensor removal and installation
• Verify connector type matches the vehicle harness before installation
• Do not over-tighten the sensor to prevent damage to threads
• Check wiring harness routing to avoid contact with hot exhaust components

Quality Assurance and Warranty

Walker oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The 350-33087 sensor undergoes rigorous testing to comply with emission control requirements. Warranty coverage details are provided by Walker Products Aftermarket and typically cover defects in materials and workmanship under normal use.