Walker 350-34088 Oxygen Sensor - Downstream

Walker 350-34088 Oxygen Sensor for Honda

Walker Products 350-34088 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Honda applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a direct service part for downstream sensor replacement on covered vehicles.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific-fit design for the listed Honda Insight and Honda CR-V applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with female radiused polygon connector
• Wiring harness length: 8.58 in.; overall length: 12.13 in.
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensor service

Product Details

The Walker Products Aftermarket line focuses on engine management sensors developed for OE replacement use, and part number 350-34088 follows that approach with application-specific fitment and connector design. This downstream oxygen sensor is listed for 2001-2006 Honda Insight and 2002-2004 Honda CR-V coverage, including downstream Bank 1 sensor positions noted in the fitment data. For shoppers searching for a Honda Insight downstream oxygen sensor or a Honda CR-V downstream O2 sensor, this part number provides a direct match for the listed vehicles.

Walker 350-34088 is designed to support the ECU’s diagnostic feedback loop. When an oxygen sensor begins to fail, the vehicle may run poorly, use more fuel, increase exhaust emissions, or trigger a malfunction indicator light. Because the sensor, wiring harness, and connector all affect performance, matching the correct connector style, wire count, and threaded mount is important during replacement.

Common Symptoms This Part May Address

• Check engine light related to downstream oxygen sensor faults
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from improper air-fuel correction
• Higher exhaust emissions during inspection or normal driving
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the vehicle’s sensor location, connector shape, and thread size before installation. This part uses a threaded mount and a female connector, so the existing harness and connector should be inspected for damage before replacement. Confirm the listed downstream position for your Honda Insight or Honda CR-V application, and compare the original sensor length and wire configuration to the part specifications.

Quality Assurance

Walker Products states that its engine management and oxygen/air-fuel sensors are developed as OE replacement parts and that the company operates under Automotive ISO 9001/TS 16949 certification. Since 1946, Walker Products has supplied engine management sensors and fuel system components for vehicle service applications.