My check engine light when on and i went to the dealer and they said my evaporative emission system leak detection pump (part# aj51-18-581a) needed to be replaced. this happened again and again; i replaced it a total of 3 times in less than 5 years. first time was in 11/21/2011, then again on 7/31/2013 and again on 1/2/2015. there is an obvious defective in craftmenship if i had to change the part 3 times in less than 5 years. please help me. *tr