Walker 350-34445 Oxygen Sensor - Downstream

Walker 350-34445 Oxygen Sensor for Honda Insight

Walker Products 350-34445 is a specific-fit heated oxygen sensor engineered as an OE-style replacement for the downstream position on select Honda Insight models. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific fit for the listed application
• 4-wire design with 22-gauge wiring
• Female connector with radiused polygon shape
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 30.63 in.; wiring harness length: 27.09 in.

Application Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for direct replacement use. Part number 350-34445 is specified for the downstream oxygen sensor location on 2002-2006 Honda Insight models, including Bank 1 Sensor 3 applications. For shoppers searching for a 2002 Honda Insight downstream oxygen sensor, a 2003-2006 Honda Insight Bank 1 Sensor 3 replacement, or Walker 350-34445 for Honda Insight, this part matches the listed fitment and connector configuration.

This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Stored oxygen sensor fault codes in the ECU
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel correction
• Elevated exhaust emissions from a failing downstream sensor
• Malfunction indicator light illumination related to sensor performance

Installation Notes and Tips

Confirm the downstream location, connector shape, wire count, and thread size before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life and affect signal quality. Verify the exhaust bung threads are clean and undamaged before threading in the replacement sensor.

Quality Assurance

Walker Products has produced engine management components since 1946 and states that its sensors are manufactured for the specified application and fitment position. The company is ISO 9001/TS 16949 certified, supporting consistent manufacturing and application-specific design for the 350-34445 oxygen sensor.