Walker 350-34272 Oxygen Sensor - Downstream

Overview of Walker Oxygen Sensor 350-34272

The Walker 350-34272 oxygen sensor is designed specifically for BMW M3, Z3, and Z4 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 oxygen sensor with 4-wire design for reliable operation
• Specific fit for BMW M3, Z3, and Z4 models
• 41.65-inch wiring harness length for flexible installation
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for secure electrical connection
• Wire gauge measurement of 20 for durability and signal integrity
• Overall length of 45.2 inches to accommodate various engine layouts

Detailed Product Description

This Walker oxygen sensor (part number 350-34272) is a heated sensor designed to provide accurate oxygen level readings in the exhaust system of select BMW vehicles. The 4-wire configuration includes heating elements that allow the sensor to reach operating temperature quickly, improving emissions control and fuel efficiency. The sensor features a radiused polygon male connector, ensuring a secure and precise fit with the vehicle’s wiring harness. With a wiring harness length of 41.65 inches and an overall length of 45.2 inches, this sensor offers sufficient reach for installation in the engine bay of BMW M3, Z3, and Z4 models. The threaded mounting type with an 18.0 mm diameter allows for straightforward replacement and compatibility with factory mounting points.

This oxygen sensor is part of the Walker Products Aftermarket line, which focuses on providing reliable and vehicle-specific emission control components. Walker Products Aftermarket parts are engineered to meet or exceed OEM specifications, ensuring proper fit and function for your BMW’s emission system.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate sensor data
• Resolves engine performance issues related to faulty oxygen sensors
• Prevents check engine light triggers caused by sensor failure
• Improves fuel economy by enabling precise engine adjustments

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate oxygen sensor socket for threaded removal and installation
• Verify connector type matches the vehicle harness before installation
• Do not over-tighten the sensor; follow torque specifications for 18.0 mm thread
• Inspect wiring harness for damage and secure connections to prevent signal loss

Quality Assurance and Warranty

Walker oxygen sensors undergo rigorous testing to meet emission control standards and ensure durability under harsh operating conditions. The 350-34272 sensor is manufactured to meet OEM fit, form, and function requirements. While specific warranty details may vary, Walker Products Aftermarket parts typically include a limited warranty against defects in materials and workmanship to provide confidence in product reliability.