Walker 350-34220 Oxygen Sensor - Downstream

Overview of Walker 350-34220 Oxygen Sensor for BMW M3, Z3, Z4

The Walker 350-34220 oxygen sensor is designed specifically for select BMW models including the M3, Z3, and Z4. 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 oxygen sensor with 4-wire configuration
• Specific fit for BMW M3, Z3, and Z4 models
• 32.99-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 36.54 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 maintaining factory-level emissions performance on vehicles like the BMW M3, Z3, and Z4.

Product Features and Technical Specifications

The Walker 350-34220 oxygen sensor features a heated sensor element that allows for faster warm-up times and improved accuracy in measuring exhaust oxygen levels. The 4-wire design includes two wires for the heater circuit and two for the sensor signal, ensuring stable operation. The wiring harness length of approximately 33 inches provides sufficient reach for installation without excess slack. The radiused polygon male connector is designed for a secure and corrosion-resistant connection, while the threaded mounting type with an 18.0 mm diameter ensures compatibility with the designated BMW models.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for engine control units
• Helps resolve rough idling and poor fuel economy issues
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates check engine light codes related to oxygen sensor failure
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Walker 350-34220 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness or connector. The 32.99-inch wiring harness length allows for flexible routing, but avoid sharp bends or contact with hot exhaust components. Thread the sensor carefully into the exhaust manifold or pipe using the 18.0 mm threaded mount, and tighten to manufacturer torque specifications to prevent leaks.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet strict quality standards for durability and performance. This part number 350-34220 undergoes rigorous testing to ensure reliable operation in BMW M3, Z3, and Z4 vehicles. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.