Walker 350-35043 Oxygen Sensor - Upstream

Walker 350-35043 Oxygen Sensor for Mazda CX-7

Walker Products 350-35043 is a heated oxygen sensor built as a specific-fit OE replacement for select Mazda CX-7 applications. It is engineered to provide the ECU with the diagnostic 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 CX-7 applications
• Threaded mounting type with 18.0 mm thread diameter
• 5-wire configuration with 20-gauge wiring
• Overall length: 20.79 in.; wiring harness length: 17.24 in.
• Radiused polygon connector shape with male and female connector ends

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed as OE-style replacements for a wide range of vehicles. Part number 350-35043 is built for the upstream position and is listed for 2012 Mazda CX-7, upstream, and 2010-2011 Mazda CX-7, upstream, including Bank 1 Sensor 1 and front oxygen sensor applications noted in the fitment data. If your Mazda CX-7 has an illuminated MIL, poor fuel economy, elevated emissions, or stored ECU fault codes related to the upstream sensor circuit, this sensor is the direct replacement to inspect first. Walker Products has supplied engine management components since 1946 and manufactures to automotive ISO 9001/TS 16949 standards.

What It Helps Address

• Check engine light related to the upstream oxygen sensor
• Incorrect air-fuel feedback to the ECU
• Reduced fuel economy from a failing sensor
• Higher exhaust emissions
• Poor engine performance caused by sensor signal issues

Installation Notes and Tips

Confirm the vehicle is a 2010-2012 Mazda CX-7 and verify the upstream location before ordering. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect operation. Threaded installation requires proper removal and tightening practices to avoid damage to the exhaust bung or sensor body.

Quality Assurance

Walker Products manufactures this oxygen sensor as an OE replacement for the specified application and backs its engine management components with ISO 9001/TS 16949 manufacturing standards. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.