Wireless drain plug

A drain plug for a component of a vehicle, comprising:

• a sensor module including at least one sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor;
• a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, wherein the stem portion defines a blind hole in fluid communication with the sensor module, and the stem portion is sealed to fluidly isolate the sensor module and an internal space of the component of the vehicle;
• a tubular sleeve disposed in the blind hole, extending outwardly therefrom, and defining an external thread on an outer surface thereof outside of the blind hole;
• and
• a sensor cap assembly configured to screw onto the external thread of the tubular sleeve and to hold the sensor module thereto.

A system for wireless monitoring a component of a vehicle, comprising:

• a drain plug including:
• a plug body having a stem portion configured to plug a corresponding hole in the component of the vehicle, and a sensor module having at least one sensor and a wireless transmitter configured to transmit data regarding a reading from the at least one sensor;
• a cap configured to cover an end of the plug body opposite from the stem portion and to enclose the sensor module, and wherein the cap is made of a material that is transmissive to radio waves;
• and
• a receiver located on the vehicle and configured to receive the data from the wireless transmitter,
• wherein the at least one sensor includes at least one of a temperature sensor, a pressure sensor, and an accelerometer.