It was my first time renting a car at the airport. I had booked a 2020 Proton model, but the actual car I received seemed to be from around 2010 and was extremely old. After just one day of driving, various problems arose, including issues with the clutch, abnormal engine noises, and two missing wheel bolts from the front tires. I contacted the rental company immediately and drove the car to their office in Kuala Lumpur city. They replaced it with another Proton, which seemed to be from around 2010 as well. After another day, the car's engine hood started emitting smoke on the highway, and the air conditioning stopped working. I urgently contacted the rental company again from the highway. They stated there were no spare cars available that day and asked me to return to their city office the next day to swap cars. On the third attempt, I was finally given a fully functional car.