Walker 350-34472 Oxygen Sensor - Downstream

Walker 350-34472 Oxygen Sensor for Mazda CX-7

Walker Products 350-34472 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for the downstream position on select Mazda CX-7 models. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper engine management and emissions control.

Key Features

• Specific-fit heated oxygen sensor for precise application matching
• Fits 2007-2012 Mazda CX-7, downstream bank 1 sensor 2
• 4-wire design with female connector and radiused polygon connector shape
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 23.15; overall length: 26.69
• 20-gauge wiring for the specified vehicle application

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed for original equipment replacement needs. Part number 350-34472 is matched to the downstream sensor location on the Mazda CX-7, where accurate exhaust feedback supports ECU monitoring and emissions system operation. This part number is also referenced as Walker 350-34472 for catalog and search use.

Walker Products has supplied engine management and fuel system components since 1946, and its sensor line is built around application-specific fitment and diagnostic feedback requirements. For shoppers searching for a downstream oxygen sensor for 2007-2012 Mazda CX-7, 350-34472 provides a direct-fit option for the listed bank 1 sensor 2 position.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal issues
• Stored ECU fault codes for the affected emissions circuit

Installation Notes and Tips

Confirm the vehicle is a 2007-2012 Mazda CX-7 and verify the downstream bank 1 sensor 2 location before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect signal quality. Threaded mounting should be checked for proper thread engagement and correct sensor placement in the exhaust stream.

Quality Assurance

Walker Products manufactures this sensor as an OE-replacement part for the specified application and supports it with the company’s long-running focus on engine management components and ISO 9001/TS 16949-certified manufacturing practices.