The provided vehicle had three of the five front wheel bolts missing, which is shocking! The car started shaking on the road because the wheel was about to fall off. Passengers could only discover the cause by leaning out the backseat window. We were driving on an elevated road, and leaning out or a falling wheel could have resulted in fatal consequences. We had to stop on the emergency lane. However, Avis's assistance line, which claims to be available from 7 AM to 12 AM, did not answer after three long waits. In the end, we had no choice but to call the police, and a tow truck dragged the car to a temporary towing company, which also kept us waiting for half an hour. The entire experience was zero stars. Avis had promised a refund because of this incident, but it has been 20 days with no news.