NTK 27028 Air / Fuel Ratio Sensor - Upstream

Direct-Fit Air/Fuel Ratio Sensor

NTK 27028 is a direct-fit heated air/fuel ratio sensor built for specific upstream applications. It uses a 5-wire design and matches the OE-style fit, form, and function expected for import and domestic emission control service.

Key Features

• Direct-fit replacement for specific upstream air/fuel ratio sensor applications
• Heated sensor design for faster operating response
• 5-wire configuration for the specified application
• 18 mm thread diameter with 0.38 in thread length
• 10.25 in wiring harness length
• Specific-fit design for accurate installation

Detailed Description

NTK 27028 is part of the Direct Fit 5-Wire A/F Sensor line, a product line focused on OE-style replacement coverage and application-specific fitment. As an upstream sensor, it is used in the exhaust stream to monitor air/fuel ratio data for the engine management system. This part cross-references Hyundai/Kia OE number 392102GAA0 for the same application. Compatible with 2015-2019 Hyundai Sonata, 2016-2019 Kia Optima, 2016-2018 Hyundai Santa Fe Sport, 2016-2018 Kia Sorento, 2017-2020 Kia Sportage, 2019 Hyundai Santa Fe, 2020 Hyundai Santa Fe, 2020 Kia Optima, and 2021-2022 Kia Sportage, upstream. Vehicle coverage includes Hyundai Sonata, Kia Optima, and Kia Sportage applications listed above. Part number 27028 is engineered for specific fitment and OE-style service on these applications.

What It Is Used For

• Replacing a failed upstream air/fuel ratio sensor
• Restoring accurate exhaust mixture feedback to the engine control system
• Addressing sensor-related fault codes tied to mixture monitoring
• Correcting drivability issues caused by inaccurate sensor output
• Supporting proper emissions system operation

Installation Notes and Tips

Verify the connector, wire count, and upstream location before installation. Confirm thread size and harness length against the original sensor to ensure proper routing and fit. Use the vehicle application data to match the correct Hyundai Sonata, Kia Optima, or Kia Sportage configuration before replacement.

Quality Assurance

NTK states that its oxygen sensors are manufactured and tested to meet or exceed OE specifications. The brand is part of the NGK family and is known for OE application coverage and sensor manufacturing expertise. Part number 27028 is built for specific-fit service in the listed applications.