NTK 27027 Air / Fuel Ratio Sensor - Upstream

NTK Direct Fit Air/Fuel Ratio Sensor

NTK Part Number 27027 is a direct-fit heated air/fuel ratio sensor built for upstream applications on select Hyundai and Kia vehicles. It is engineered for specific-fit replacement where accurate air/fuel monitoring is needed for proper engine management and emissions control.

Key Features

• Direct Fit 5-Wire A/F Sensor for specific applications
• Heated sensor design for faster operating response
• 16.25 in. wiring harness length
• 18 mm thread diameter with 0.38 in. thread length
• Upstream location for Bank 1 Sensor 1 applications where listed
• No mounting bracket included

Product Details

NTK 27027 is part of the Direct Fit 5-Wire A/F Sensor line, which focuses on OE-style replacement for vehicles that require a precise sensor match. NTK manufactures oxygen and air/fuel ratio sensors with ceramic-based technology and extensive production testing to help maintain fit, form, and function consistent with original equipment requirements. This sensor cross-references Hyundai/Kia OE part number 392102G240 for the same application.

Compatible With select Hyundai Sonata, Tucson, Santa Fe, and Santa Fe Sport models, as well as Kia Sportage, Optima, and Sorento applications listed below. For shoppers searching for an upstream air fuel ratio sensor for 2015-2019 Hyundai Sonata or a direct fit oxygen sensor for 2016-2019 Kia Sorento, NTK Part Number 27027 is the specified replacement.

Common Issues This Sensor May Address

• Check engine light related to air/fuel ratio sensor performance
• Incorrect fuel trim readings from a failing upstream sensor
• Rough idle or drivability concerns tied to sensor signal degradation
• Emissions test failures caused by inaccurate exhaust feedback
• Slow sensor response on heated upstream applications

Installation Notes and Tips

Install in the upstream position only where the fitment list specifies Bank 1 Sensor 1 or upstream service. Verify connector style, thread size, and harness length before installation. Because this is a specific-fit sensor, confirm the vehicle year, make, model, and engine application against the listed coverage before ordering. NTK 27027 is intended for direct replacement use on the applications shown, including 2021-2022 Kia Sportage upstream and 2020-2021 Hyundai Tucson upstream.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer, and its sensors are produced with manufacturing controls and testing intended to meet or exceed OE specifications. The NTK 27027 air/fuel ratio sensor reflects that OE-focused approach for import and domestic emissions applications.

• Fits 2021-2022 Kia Sportage, Upstream
• Fits 2020-2021 Hyundai Tucson, Upstream
• Fits 2020 Hyundai Santa Fe, Upstream
• Fits 2020 Kia Optima, Upstream
• Fits 2020 Kia Sorento, Upstream
• Fits 2016-2020 Kia Sportage, Upstream
• Fits 2019 Hyundai Santa Fe, Upstream
• Fits 2015-2019 Hyundai Sonata, Upstream
• Fits 2018-2019 Hyundai Tucson, Upstream
• Fits 2016-2019 Kia Optima, Upstream
• Fits 2016-2019 Kia Sorento, Upstream
• Fits 2016-2018 Hyundai Santa Fe Sport, Upstream