Michela Adelfio, 40, and 41-year-old Giulio Muratore were arrested outside Palermo in the Fiat Punto they stand accused of stealing from a nearby hospital.
On being stopped by police the duo said they decided to take the car after waiting in vain for the bus to arrive, Giornale di Sicilia reported.
The pair went to hospital for checks and afterwards discovered the Fiat parked outside the emergency room, with the doors open and the keys in the ignition.
They sped off towards Palermo, leaving car owner Petralia Sottana to soon discover the theft.
She contacted police who alerted their patrol squads in the area, one of which tracked the car down after a few minutes and arrested Adelfio and Muratore.