When a person buys a car from a dealer, the only way to make the vehicle last for 5 years or longer is through proper care. This can be done visually or brought to the shop after reaching a certain mileage for preventive maintenance.
The same thing but in a smaller scale is done for RC cars. After buy or build an RC car, and race in track, this should be done after each run that will usually take 30 minutes to an hour. Here are a few tips on repairing RC cars:
You may be interested in reading my other guide: RC Car Collection