All that and more! Sensors like shock potentiometers, strain gauges, temperatures from all over the car, IMU readings ([ag][xyz]), and electrical measurements like HV/LV voltage, current, power, energy, as well as controls like motor commands and speeds, controller states, etc.
Lots of folks put work into a car and they all have metrics of interest to tell how their systems perform. An ideal telemetry system for us captures all this information and makes it available both in real time and analysis.