Walker 350-34411 Oxygen Sensor - Upstream

Walker 350-34411 Oxygen Sensor for Hyundai and Mitsubishi

Walker Products 350-34411 is a heated upstream oxygen sensor built as a specific-fit OE-style replacement for select Hyundai and Mitsubishi applications. It is engineered to provide the ECU with the feedback needed for fuel control and emissions monitoring on the listed vehicles.

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors made for application-specific fitment and connector positioning. For vehicles such as the 1992-1993 Hyundai Sonata, 1992-1993 Hyundai Elantra, and 1991-1992 Mitsubishi Galant, this sensor is matched to the upstream location and the required diagnostic signal path.

Key Features

• Heated oxygen sensor for upstream placement
• Specific-fit design for listed Hyundai and Mitsubishi applications
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon connector shape for application-specific connection
• Wiring harness length: 15.28
• Overall length: 18.82
• Walker Products Aftermarket part number 350-34411

Detailed Description

Walker 350-34411 is an upstream heated oxygen sensor for select 1991-1993 Hyundai and Mitsubishi vehicles, including Hyundai Elantra, Hyundai Sonata, and Mitsubishi Galant applications. It is designed for the bank 1 sensor 1 or front sensor positions listed in the fitment data, helping the ECU monitor exhaust oxygen content and adjust air-fuel strategy accordingly. If the original sensor has aged or failed, the vehicle may show poor running quality, higher fuel use, increased emissions, or a malfunction indicator light.

This part number is built for the specified application and connector layout, making it a direct replacement choice for drivers searching for a 1993 Hyundai Elantra upstream oxygen sensor, a 1992-1993 Hyundai Sonata front oxygen sensor, or a 1991-1992 Mitsubishi Galant bank 1 sensor 1 replacement. Part number 350-34411 is also useful when matching the correct upstream sensor location on these vehicles.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle’s year, make, model, and sensor position before ordering. This sensor is listed for upstream applications only, so match the original connector style, threaded mounting point, and wire configuration to the existing part. Inspect the sensor wiring harness and connector for heat damage or physical wear before installation, since damaged wiring can shorten sensor life and affect signal quality.

For fitment searches, this part fits 1993 Hyundai Elantra, upstream; 1992-1993 Hyundai Sonata, upstream; and 1991-1992 Mitsubishi Galant, upstream. Walker 350-34411 should be matched to the exact listed position and engine-management requirement.

Quality Assurance

Walker Products has produced engine management and oxygen sensor components since 1946 and operates as an ISO 9001/TS 16949 certified company. The Walker Products Aftermarket line is built around application-specific replacement parts for modern diagnostic systems and OE-style fitment requirements.