Walker 350-35049 Oxygen Sensor - Upstream

Walker 350-35049 Oxygen Sensor for Hyundai Tucson and Kia Sportage

Walker Products 350-35049 is a heated upstream oxygen sensor built as a specific-fit OE-style replacement for select Hyundai Tucson and Kia Sportage applications. It is engineered to provide the ECU with the feedback needed for accurate air-fuel control and emissions monitoring.

Key Features

• Specific-fit heated oxygen sensor for upstream Bank 1 Sensor 1 locations
• 5-wire design with 20-gauge wiring harness
• Radiused polygon male connector for application-specific fitment
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 28.66 in.; wiring harness length: 25.12 in.
• Walker Products Aftermarket engine management sensor line

Product Details

The Walker Products Aftermarket line focuses on engine management and oxygen/air-fuel sensors developed for OE replacement use across many vehicle platforms. Part number 350-35049 is built for the upstream position and is intended for vehicles that require Bank 1 Sensor 1 feedback, including select 2010-2013 Hyundai Tucson and 2011-2013 Kia Sportage models. This part number appears in fitment for non-California emissions applications and is not listed for California emissions-certified vehicles.

This part cross-references no listed interchange numbers in the provided data. For search relevance, shoppers often look for an upstream oxygen sensor for Hyundai Tucson Bank 1 Sensor 1 or a front oxygen sensor for Kia Sportage Bank 1 Sensor 1.

What It Helps Address

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

Installation Notes

• Verify the vehicle is a non-California emissions application before ordering.
• Confirm the upstream Bank 1 Sensor 1 location on the exhaust system.
• Inspect the sensor connector, wiring harness, and nearby terminals for damage before installation.
• Check for exhaust leaks or related engine management faults that can affect sensor readings.
• Use the vehicle’s service information to confirm connector orientation and thread engagement.

Quality Assurance

Walker Products states that its engine management sensors are manufactured for specific applications and fitment positions, with feedback characteristics intended to meet ECU requirements. The company is ISO 9001 / TS 16949 certified and has supplied engine management and fuel system components since 1946.