We use Original Equipment Manufacturer (OEM) parts. Even items such as washer belts usually have specific design requirements that must be met in order to provide the required performance and a satisfactory life span. Gone are the days when you could install a plain rubber automotive belt and have the machine function properly. Over time, design and material flaws can become apparent, and modified versions of these parts are made available by the manufacturer to alleviate any potential premature failures. The appliance manufacturers are in the best position to track the failure rates and determine if changes are necessary.
 

Also, using an aftermarket part can void any warranty left on the appliance. Products like washing machines, refrigerators and dishwashers often have an extended limited warranty on some of their components. Installing any unauthorized replacement part could impact the warranty of other components that may still be covered. If the manufacturer discontinues a replacement part, aftermarket replacements may be the only choice.