Walker 350-35003 Oxygen Sensor - Upstream Front or Upstream Rear

Walker 350-35003 Oxygen Sensor for OE-Style Emissions Control

Walker Products 350-35003 is a heated oxygen sensor built as a specific-fit replacement for select Acura and Honda applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for OE-style replacement needs. The 350-35003 follows the application-specific approach used across the Walker Products line, with fitment matched to the vehicle position and connector layout.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific fit design for direct application matching
• 5-wire configuration with a radiused polygon male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 9.37 in.
• Overall length: 12.91 in.
• Wire gauge: 20

Detailed Description

The Walker 350-35003 oxygen sensor is designed for vehicles that rely on precise exhaust-gas feedback to manage air-fuel ratio and monitor catalyst performance. As a heated sensor, it reaches operating temperature faster and helps the ECU maintain stable control during warm-up and normal driving. This part number is listed for 2007-2010 Honda Odyssey, 2007-2009 Acura MDX, and 2009-2010 Acura RL in upstream front and upstream rear positions, depending on the application.

Use Walker Products 350-35003 when replacing a worn sensor on a Honda Odyssey upstream front or upstream rear location, or on an Acura MDX or Acura RL in the listed upstream positions. The part number 350-35003 is built for specific fitment rather than universal use, which helps match the connector, harness length, and threaded mounting requirements of the original sensor location.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a degraded sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals. Confirm the vehicle position carefully, since this application is listed for upstream front and upstream rear locations on select Acura and Honda models. Verify thread size, connector shape, and harness routing against the original sensor before installation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates with Automotive ISO9001/TS 16949 certification. The 350-35003 is part of the Walker Products Aftermarket line, which is focused on OE-style replacement sensors for application-specific fitment and ECU feedback requirements.