Walker 350-34265 Oxygen Sensor - Center

Walker Products Oxygen Sensor for Mazda 6

Walker Products Part Number 350-34265 is a specific-fit heated oxygen sensor for select Mazda 6 applications. It is engineered as an OE-style replacement to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for select Mazda 6 center positions
• 4-wire design with female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 21.18 in.; overall length: 24.72 in.
• Wire gauge: 20

Detailed Description

Walker Products Aftermarket 350-34265 is part of the Walker Products Engine Management and Oxygen/Air-Fuel sensor line, built for application-specific fitment and ECU feedback requirements. This heated oxygen sensor is listed for 2005-2008 Mazda 6 center positions, including Calif-ESV and B1S2 applications, making it a direct-fit choice for drivers replacing a failed upstream or center oxygen sensor on the Mazda 6.

As an emissions control sensor, this part helps the engine management system monitor exhaust oxygen content so the ECU can adjust air-fuel delivery. For Mazda 6 owners dealing with a check engine light, poor fuel economy, or elevated emissions, the sensor, connector, and wiring should be inspected together to confirm the root cause before replacement. Part number 350-34265 is also a useful search reference when sourcing the correct Mazda 6 oxygen sensor by application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough running or inconsistent air-fuel control
• Increased fuel consumption
• Higher exhaust emissions
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle’s exact year, engine/emissions package, and sensor position before ordering. This part uses a threaded mounting style and a female connector, so the existing connector shape and harness routing should be checked against the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since those issues can shorten sensor life and trigger diagnostic trouble codes.

Fits 2005 Mazda 6, center. Fits 2006 Mazda 6, center. Fits 2007-2008 Mazda 6, center. Compatible Mazda 6 search terms include center oxygen sensor, Calif-ESV, and B1S2 applications.

Quality Assurance

Walker Products has produced engine management and fuel system components since 1946 and operates under Automotive ISO9001/TS 16949 certification. The Walker Products Aftermarket line is built around application-specific sensor fitment and ECU feedback requirements for modern emissions systems.