A 2003 Jeep Liberty would have dozens of sensors, including but not limited to:
* Engine sensors: Oxygen sensors, crankshaft position sensor, camshaft position sensor, manifold absolute pressure (MAP) sensor, throttle position sensor, coolant temperature sensor, mass airflow sensor (MAF), etc.
* Transmission sensors: Various speed and shift position sensors.
* Brake system sensors: Wheel speed sensors (for ABS), brake pressure sensors.
* Safety sensors: Airbag deployment sensors.
* Body control sensors: Door ajar sensors, seatbelt sensors, etc.
To get a precise number, you'd need to consult a detailed wiring diagram or parts list specific to that vehicle's VIN. Even then, counting every tiny sensor (like those in the climate control system) would be a significant undertaking.