Walker 350-34645 Oxygen Sensor - Downstream

Walker 350-34645 Oxygen Sensor Overview

Walker 350-34645 is a heated oxygen sensor built as a direct-fit replacement for specific Hyundai applications. It is engineered for downstream bank 1 sensor 2 locations on select 1998-2001 Hyundai Tiburon and 1998-2000 Hyundai Elantra models, helping the ECU receive the exhaust feedback it expects.

Walker Products Aftermarket focuses on OE-style engine management components, and this oxygen sensor follows that approach with application-specific fitment, a threaded mount, and a 4-wire heated design.

Key Features

• Part number: 350-34645
• Heated oxygen sensor for downstream placement
• Specific fit for select Hyundai Tiburon and Hyundai Elantra applications
• 4-wire design with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 14.29
• Overall length: 17.83
• Connector shape: radiused polygon

Detailed Description

This Walker oxygen sensor is designed for vehicles that require a downstream bank 1 sensor 2 replacement, including 1998-2001 Hyundai Tiburon and 1998-2000 Hyundai Elantra models. The heated sensor design helps the engine control unit monitor exhaust conditions after the catalytic converter, supporting accurate diagnostic feedback and emissions system operation. If you are searching for a 1998-2001 Hyundai Tiburon downstream oxygen sensor or a 1998-2000 Hyundai Elantra bank 1 sensor 2 replacement, Walker 350-34645 is built for that specific application. The Walker Products Aftermarket line is centered on engine management and oxygen/air-fuel sensor replacements for vehicle-specific service needs.

Common Issues This Sensor May 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 stored ECU fault codes
• Damaged sensor wiring, connector, or harness-related diagnostic concerns

Installation Notes and Tips

Confirm the vehicle uses the downstream bank 1 sensor 2 position before ordering. Inspect the sensor connector, wiring harness, and surrounding exhaust components for heat damage or physical wear before installation. Because this is a threaded, specific-fit sensor, verify thread diameter, connector shape, and harness length against the original part to ensure proper routing and connection.

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. Since 1946, the brand has supplied engine management and fuel system components for a wide range of vehicles, including Hyundai Tiburon and Hyundai Elantra applications. This part cross-references Walker Products Aftermarket 350-34645 for the same application.