Walker 350-34677 Oxygen Sensor - Downstream

Walker 350-34677 Oxygen Sensor for Honda

Walker 350-34677 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Honda applications. It is engineered for the downstream Bank 1 Sensor 2 position on listed Honda CR-V and Honda Civic models, helping the ECU receive the exhaust feedback it expects.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for application-specific fitment. The 350-34677 follows that approach with a threaded mounting design, 4-wire heated construction, and a female radiused-polygon connector for the correct vehicle interface.

Key Features

• Specific-fit oxygen sensor for listed Honda downstream applications
• Heated sensor design for faster operating temperature
• 4-wire configuration with 20-gauge wiring
• Female radiused-polygon connector
• Threaded mounting type with 18.0 mm thread diameter
• Overall length: 12.91 in.; wiring harness length: 9.37 in.

Detailed Description

This Walker oxygen sensor, part number 350-34677, is designed for vehicles that require downstream exhaust monitoring at Bank 1 Sensor 2. It is listed for 2005-2006 Honda CR-V downstream, as well as 2003-2005 Honda Civic downstream applications, including California emissions and California-ESV configurations noted in the fitment data. For drivers searching for a downstream oxygen sensor for a 2004 Honda Civic California-ESV or a 2005 Honda CR-V Bank 1 Sensor 2 replacement, this part matches the specified position and connector style.

Walker Products has supplied engine management components since 1946 and builds these sensors as application-specific replacements for the vehicle’s diagnostic system. The 350-34677 is intended to restore proper exhaust feedback to the ECU when the original sensor has aged, been damaged, or is no longer responding correctly.

Common Issues This Sensor May Address

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

Installation Notes and Tips

Verify the vehicle’s year, model, emissions package, and downstream Bank 1 Sensor 2 location before ordering. Confirm the connector shape, wire count, and threaded mounting style match the original sensor. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since damaged wiring can shorten sensor life and affect readings.

Fits 2005-2006 Honda CR-V, downstream. Fits 2004-2005 Honda Civic, downstream. Fits 2003 Honda Civic, downstream, California-ESV applications from chassis/VIN #3S020169.

Quality Assurance

Walker Products manufactures this oxygen sensor as an OE-replacement part for specific vehicle applications and backs its engine management line with ISO 9001/TS 16949 certified manufacturing practices.