Consider the warranty period. Generally, if you are buying an engine part for machinery, the warranty period said to be offered ranges from one year to a lifetime depending on the maker of the part and the component. This also means that such a part incurs lesser risk of breakages and problems than parts that do come with shorter warranties. It would be best if you also paid attention to the warranty and its related documents that state what issues or events the warranty covers for how long and whether there are conditions. It's a smart idea to purchase engine components with a decent warranty since it helps minimize future costs and repairs.