Exemplary embodiments are disclosed of telematics or telecommunication control units (TCUs) modules that includes a TCU and one or more sensor arrays (e.g., mmWave sensors, temperature sensors, ambient light sensors, biometric sensors, cameras, proximity sensors, WiFi, touch sensors, microphones, etc.) for monitoring vehicle interiors (e.g., monitoring health conditions of occupants within a vehicle passenger interior, etc.). In exemplary embodiments, sensors may be combined or integrated with (e.g., embedded within, placed on TCU printed circuit board (PCB), directly connected with, mounted along a bottom or side of, etc.) the TCU.