NTK EF0018 Engine Coolant Temperature Sensor

Engine coolant temperature sensing

The NTK Engine Coolant Temperature Sensor EF0018 provides accurate coolant temperature input for engine management systems. It is built for Hyundai and Kia applications that rely on precise temperature data for fuel control, idle quality, and cooling fan operation.

NTK, The Sensor Specialist, expands on decades of OE-focused automotive experience with technical sensors for import and domestic vehicles. The EF0018 is manufactured to meet or exceed OE specifications and is validated through thermal shock, vibration, and OBD verification testing.

Key features

• Blade terminal design with a square connector shape
• 4-terminal female connector configuration
• No wiring harness included
• OE-style sensor construction for direct replacement service
• Part number EF0018 for easy catalog matching

Detailed product information

This NTK coolant temperature sensor is used to report engine coolant temperature to the vehicle control system. Accurate temperature feedback helps the ECU manage cold-start enrichment, warm-up strategy, radiator fan activation, and temperature-related diagnostics. The EF0018 is a direct-fit sensor for a wide range of Hyundai Sonata, Tucson, Santa Fe, Palisade, and Kia Optima, Sorento, Sportage, and Telluride applications.

This part cross-references Standard Ignition TX191 for the same application.

Vehicle fitment

• Fits 2020-2021 Hyundai Palisade, N/A
• Fits 2019-2021 Hyundai Santa Fe, N/A
• Fits 2010-2012 Hyundai Santa Fe, N/A
• Fits 2018-2021 Hyundai Tucson, N/A
• Fits 2010-2015 Hyundai Tucson, N/A
• Fits 2019-2021 Hyundai Veloster N, N/A
• Fits 2019-2021 Kia Sedona, N/A
• Fits 2015-2021 Kia Sportage, N/A
• Fits 2013 Kia Sportage, N/A
• Fits 2020-2021 Kia Telluride, N/A
• Fits 2018-2020 Kia Cadenza, N/A
• Fits 2009-2020 Kia Optima, N/A
• Fits 2012-2020 Kia Sorento, N/A
• Fits 2012-2019 Hyundai Sonata, N/A
• Fits 2013-2018 Hyundai Santa Fe Sport, N/A
• Fits 2018 Kia Sedona, N/A; from 2/2018
• Fits 2014 Kia Sportage, N/A; located on thermostat housing
• Fits 2012 Kia Sportage, N/A; located on thermostat housing
• Fits 2010-2013 Kia Forte, N/A
• Fits 2010-2013 Kia Forte Koup, N/A
• Fits 2012-2013 Kia Forte5, N/A
• Fits 2009-2011 Hyundai Sonata, N/A; located on thermostat housing
• Fits 2010 Kia Magentis, N/A
• Fits 2010 Kia Rondo, N/A
• Fits 2009 Kia Rondo, N/A; from production date 6/2008
• Fits 2008 Hyundai Sonata, N/A; located on thermostat housing; from 12/2007

Common replacement concerns

• Incorrect coolant temperature readings
• Check engine light related to temperature sensor faults
• Hard starting or rough cold operation
• Cooling fan cycling problems
• Fuel mixture and drivability issues tied to bad temperature input

Installation notes and quality

Verify connector shape, terminal count, and application notes before installation. This EF0018 sensor uses a square female connector with four blade terminals and does not include a wiring harness. On listed Hyundai and Kia applications, confirm the thermostat housing location notes where shown in the fitment data.

NTK sensors are produced with OE application knowledge and undergo testing for thermal shock, vibration, and OBD verification to support consistent performance in service.