Part number : 463863B900 (46386-3B900)
Part name : SENSOR-OIL TEMPERATURE
Application model : Hyundai New SantaFe
Net weight : 0.009kg
Gross weight(in plastic bag) : 0.010kg

Before 9th May 2016, 463863B000 Hyundai TG Grandeur was supplied. Now 463863B900 is available for it.

Produced by INZI controls.
Made in Korea.
About INZI, your can refer to my previous post : https://koreapartsinfo.com/2018/12/17/inzi-controls-corp
INZI website : http://www.inzi.co.kr

It’s an oil temperature sensor for a transmission. There is another oil temperature sensor in engine related part category. I searched about transmission oil sensor in Wikipedia. It’s called as Transmission Fluid Temperature sensor (TFT) too. If I wrongly understood, please leave a comment please.

Transmission fluid Temperature sensor (TFT)
This may also be known as Transmission Oil Temperature. This sensor determines the fluid temperature inside the transmission. This is often used for diagnostic purposes to check ATF (Automatic Transmission Fluid) at the correct temperature. The main use of this has been as a failsafe feature to downshift the transmission if the ATF becomes extremely hot. On more modern transmissions this input allows the TCU to modify the line pressure and solenoid pressures according to the changing viscosity of the fluid based on temperature in order to improve shift comfort, and also to determine regulation of the torque converter lock-up clutch.

https://en.wikipedia.org/wiki/Transmission_control_unit

More closed photographs of 46386-3B900

463863B900 SENSOR-OIL TEMPERATURE
463863B900 SENSOR-OIL TEMPERATURE
463863B900 SENSOR-OIL TEMPERATURE
463863B900 SENSOR-OIL TEMPERATURE
463863B900 SENSOR-OIL TEMPERATURE