In this case, while selecting engine parts, the warranty comparison among brands becomes important in making your decision. So some manufacturers have longer warranties while others have shorter ones. Or, some have more complex claim processes than others. A good warranty usually means that the manufacturer is sure of the product they are selling and offers several benefits to the customer as well. Knowing the limitations of such warranties and guarantees can help you make a good investment in reliable engine parts that are sure to have competent after-sales support.