First of all, for every owner of a Mitsubishi be it old or new, the difference between an OEM part and an aftermarket part ought to be understood. In simple words, an OEM part refers to a part that has been made by the car manufacturer for your specific vehicle only. Ao an aftermarket part is any part that a third party makes and these can vary in how effective and reliable they are. Depending on your purpose, your budget and the amount of use you will give the car, you will select one type of the part or the other. However, with the correct knowledge, one is able to make a decision that improves the quality of the car.