Walker 350-34330 Oxygen Sensor - Downstream

Overview of Walker 350-34330 Oxygen Sensor

The Walker 350-34330 oxygen sensor is designed specifically for select BMW models, including the 135i, 335i, 535i, 640i, 740i series, and various xDrive and ActiveHybrid variants. This heated oxygen sensor provides precise emissions control and engine performance monitoring through its advanced design and fitment.

• Heated sensor type for faster warm-up and accurate readings
• Specific fit for BMW models such as 135i, 335i, 535i, 640i, 740i, and more
• 27.09-inch wiring harness length with 4 wires of 22 gauge
• Threaded mounting with 18.0 mm thread diameter for secure installation
• Radiused polygon male connector for reliable electrical connection
• Overall length of 30.63 inches for proper placement in exhaust system

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-34330) is engineered to meet the exact specifications required by BMW vehicles. Featuring a heated sensor element, it ensures quicker activation and consistent oxygen level readings, which are critical for optimal fuel mixture and emissions control. The sensor includes a 27.09-inch wiring harness with four 22-gauge wires, providing the necessary electrical connections for accurate signal transmission. Its radiused polygon male connector and threaded mounting type with an 18.0 mm thread diameter allow for a secure and precise fit in the exhaust system.

The Walker Products Aftermarket line focuses on delivering reliable emission control components that meet or exceed OEM standards. This oxygen sensor is part of that line, offering a direct replacement solution tailored for specific BMW models, ensuring compatibility and performance without modification.

Compatible BMW Models and Applications

• BMW 135i, 135is, M135i
• BMW 335i, 335i GT xDrive
• BMW 535i, 535i GT, 535i GT xDrive, 535i xDrive
• BMW 640i, 640i Gran Coupe, 640i xDrive, 640i xDrive Gran Coupe
• BMW 740i, 740Li, 740Li xDrive
• BMW ActiveHybrid 3, ActiveHybrid 5, ActiveHybrid 7
• BMW X3, X4, X5, X6

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor readings
• Increased emissions due to sensor malfunction
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor failure

Installation Notes and Tips

Installation requires removal of the old oxygen sensor and threading the Walker 350-34330 sensor into the exhaust manifold or pipe. Ensure the connector matches the radiused polygon male type for proper electrical connection. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Verify wiring harness routing to avoid contact with hot or moving parts. This sensor is a specific fit for BMW models listed and should not require modifications.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards, ensuring durability and reliable performance. While specific warranty details for part number 350-34330 should be confirmed at the point of purchase, Walker typically offers limited warranties covering defects in materials and workmanship. This oxygen sensor is designed to provide consistent operation within OEM specifications for emission control systems.