Walker 350-34126 Oxygen Sensor - Upstream

Walker Oxygen Sensor for OE-Style Engine Feedback

Walker Products 350-34126 is a heated oxygen sensor built for specific upstream applications and accurate ECU feedback. It is engineered as an OE-style replacement for select Honda, Acura, and Isuzu vehicles, including Honda Accord, Civic, Prelude, and CR-V fitments.

The Walker Products Aftermarket line focuses on application-specific engine management sensors, with each part number matched to the intended mounting position and diagnostic response. Part number 350-34126 is designed for upstream use where the ECU relies on the sensor signal to manage fuel control and emissions performance.

Key Features

• Heated oxygen sensor for upstream placement
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for proper harness connection
• Threaded mounting type with 18.0 mm thread diameter
• Overall length: 12.91 in.; wiring harness length: 9.37 in.
• Fits select 1990-2001 Honda, Acura, and Isuzu models

Detailed Description

Walker 350-34126 is an oxygen sensor for upstream engine management on select Acura Integra, Acura CL, Honda CR-V, Honda Civic, Honda Odyssey, Honda Accord, Honda Civic del Sol, Honda Prelude, and Isuzu Oasis applications. It is built to provide the diagnostic feedback the ECU expects from the affected sensor location, helping maintain proper air-fuel control and emissions monitoring.

This part is a direct-fit style replacement for vehicles that require a threaded, heated, 4-wire oxygen sensor with the specified connector shape and harness length. For buyers searching for an upstream oxygen sensor for 1990-1997 Honda Accord, a front oxygen sensor for 1997-2001 Honda CR-V, or a Bank 1 Sensor 1 replacement for 1994-2001 Acura Integra, this part number 350-34126 matches those application details.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

Confirm the vehicle’s sensor position before ordering, since this part is listed for upstream applications only. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation. Verify thread size, connector shape, and harness routing against the original sensor to ensure proper fitment on Honda Accord, Honda Civic, Honda Prelude, and related applications.

For best results, compare the existing sensor location and connector style with the vehicle’s original equipment configuration. This helps ensure correct installation on the intended upstream position and proper ECU feedback after replacement.

Quality Assurance

Walker Products has produced engine management and oxygen sensor components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific replacement parts for OE-style fit and diagnostic performance.

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