Walker 350-34577 Oxygen Sensor - Downstream

Walker Heated Oxygen Sensor for OE Replacement

Walker Products Part Number 350-34577 is a specific-fit heated oxygen sensor built for downstream applications that require accurate ECU feedback. It is engineered as an OE replacement for select Honda and Acura models, including Honda Civic, Honda Fit, Honda City, and Acura CSX.

Key Features

• Heated oxygen sensor for downstream placement
• Specific fit for the listed vehicle applications
• 4-wire design with 22-gauge wiring
• Radiused polygon female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 21.18 in.; overall length: 24.72 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed to replace original equipment parts in a wide range of vehicles. Part number 350-34577 is a heated downstream oxygen sensor that provides the diagnostic signal the ECU expects from the affected location. It is a direct-fit solution for vehicles such as the 2006-2011 Honda Civic, 2007-2008 Honda Fit, 2014-2015 Honda City, 2018-2020 Honda City, and 2006-2011 Acura CSX. This part number 350-34577 is built for the specified fitment position and connector style, helping maintain proper sensor communication in the exhaust system.

This part cross-references no listed interchange numbers for the same application.

Common Issues This Sensor Can Address

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

Installation Notes and Tips

Confirm the downstream position and connector shape before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion, since physical damage can shorten service life. Verify thread diameter and mounting style match the vehicle before beginning the repair. For fitment-specific applications, use the vehicle identification and sensor location to confirm the correct bank and sensor position.

Quality Assurance

Walker Products manufactures engine management sensors as OE-style replacements and operates as an ISO 9001/TS 16949 certified company. Since 1946, the brand has supplied oxygen sensors and fuel system components for automotive applications worldwide.