GRAND THEFT AUTO V Cheats for free car / vehicle repairs:
Switch to a different character than the one driving the vehicle you want repaired, then immediately switch back.
Save the game and reload it. Your vehicle should be fully repaired.
Park the vehicle inside a safehouse garage and let the shutters close. Once you return to the garage, your vehicle should be completely fixed.
Of interest, Take-Two Interactive has officially announced that Grand Theft Auto V hit more than $1 billion in sales during its first three days on sale. According to the company, this marks the fastest sales of any entertainment property, including video games and feature films. Read more here.