This was the worst rental experience I've had in the eight years of using this company. After picking up the car from the AVIS desk at Newark Airport, the vehicle's tire had issues three days later, making it undrivable at night on the road without any assistance. Attempts to contact the car rental company were unsuccessful. Finally called the general service line and was told to drive to the nearest location myself. The next day, I went to the designated location and swapped cars since I couldn't risk driving a faulty vehicle to refuel. I informed the staff that the previous car had 3/4 tank of gas left due to the issue. There was no apology for the vehicle's defect. Six days later, I returned the car at Boston Reagan Airport only to find an extra $120 charge on my bill, despite having prepaid all fees. The onsite AVIS staff couldn't explain the charge and offered no solution. Due to an imminent flight back to China, I couldn't negotiate further, but I did report the issue to the general service line before departure. There's been no follow-up since then. My decade-long international travel experience always involved this company, but this was particularly poor. The car company showed no remorse for the inconvenience caused by the vehicle malfunction and there were inexplicable charges. Post-complaint follow-up was also slow. This service was disappointing.