I have a 2010 Mazda 3S Grand touring sedan with 50,000 miles on it. Lately it has been giving off a lot of gasoline odor and also rotten egg odor. What do you guys think it might be? Do you think it might be something that is covered under the drivetrain warranty? It drives okay it's just that when I park in my garage it fills my whole house with gasoline smell when I go in the door. I've had it since it was new in April 2010. Thanks for any ideas!