Walker 350-34119 Oxygen Sensor - Downstream, Downstream Front or Downstream Rear

Walker 350-34119 Oxygen Sensor Overview

Walker Products 350-34119 is a heated oxygen sensor built as a specific-fit OE replacement for select Honda and Acura applications. It is engineered to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. For vehicles such as the Honda Accord, Honda Pilot, Acura MDX, Acura CL, Acura TL, and Honda Prelude, this downstream sensor is matched to the required mounting position and connector style.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for application-matched installation
• 4-wire configuration with female connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 31.42
• Overall length: 34.96
• Radiused polygon connector shape
• Walker Products part number 350-34119

Application Details

This Walker 350-34119 oxygen sensor is built for downstream positions on select 1995-2004 Honda and Acura vehicles. It is listed for 2004 Honda Pilot downstream rear and downstream front, 2003 Honda Pilot downstream, 2001-2002 Acura MDX downstream, 1997-1999 Acura CL downstream, 1999 Acura TL downstream for non-California emissions vehicles, 1998-1999 Honda Accord downstream for non-California emissions vehicles, 1996-1997 Honda Accord downstream, and 1996 Honda Prelude downstream. Use the exact position shown in the vehicle listing to ensure correct ECU feedback and emissions system operation. Part number 350-34119 is also referenced as a direct replacement for the same application in select listings.

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 incorrect air-fuel correction
• Stored ECU fault codes for the affected sensor circuit

Installation Notes

Confirm the vehicle year, make, model, emissions calibration, and sensor position before installation. This part uses a threaded mount and a female connector, so the harness routing and connector orientation should match the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before replacement. For best results, install in the exact downstream location specified for the vehicle.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under Automotive ISO9001/TS 16949 quality systems. The brand has supplied engine management and fuel system components since 1946, with application-specific cataloging and fitment control for modern repair needs.