Walker 350-34110 Oxygen Sensor - Downstream

Walker 350-34110 Oxygen Sensor for Mazda 3

Walker Products 350-34110 is a heated oxygen sensor built as a specific-fit OE replacement for select Mazda 3 and Mazda 3 Sport applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Mazda applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific fitment
• Overall length: 13.9 in.; wiring harness length: 10.35 in.

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for worldwide vehicle applications. Part number 350-34110 is built for the correct sensor location and fitment position, helping maintain the diagnostic feedback the ECU expects. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With 2010-2013 Mazda 3, downstream; 2012-2013 Mazda 3 Sport, downstream; 2011 Mazda 3 Sport, upstream; and 2010 Mazda 3 Sport, downstream. Use 350-34110 when replacing a heated oxygen sensor on these Mazda 3 and Mazda 3 Sport applications.

Common Issues This Sensor May Address

• Check engine or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel monitoring
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for both upstream and downstream locations depending on the vehicle and model year. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Verify thread size, connector shape, and harness length against the original part to ensure proper routing and fit.

Quality Assurance

Walker Products states that its engine management sensors are developed under Automotive ISO 9001/TS 16949 quality systems and have been produced for OE-style replacement use since 1946. Part number 350-34110 is manufactured for the specified application and fitment position to support the diagnostic feedback required by the ECU.