Do you really BMW, Inifinty, Acura, or MB would fix something under warranty if they have reason to believe you broke it. Lexus has some of the best dealer service around, I am not saying they make a better car but the dealers are definitely better. Like SteveJ said, just trade in the car as it is, no one will know about the broken flap. Then you can buy the G37 and change out steering components every 10,000 miles :)