I don't slam mine, I just gently (yet firmly) push it in until I hear it click. No problems 2 1/2 years later, and mine is also a 2009. Although, I'm not sure if my mom or dad slam it when they "borrow" it... Actually, I have faith in my dad, he always takes care of his cars. My mom, well, nothing has broke on it yet from her driving it. However, even if they did slam it, the gas door still functions properly.