Use & Care guides = Warranty
Keep your guide and take a look at the warranty page. Some units will have a warranty beyond the first year. Example KUDP02SRSS0 Kitchenaid Dishwashers have 1 full year on everything, standard in the industry. But this unit, being a nice high-end Kitchenaid also carries :
SECOND THROUGH FIFTH YEAR LIMITED WARRANTY ON NYLON COATED DISHRACKS, WASH AND DRAIN MOTOR,
ELECTRONIC CONTROL SYSTEM AND HEATING ELEMENT
LIFETIME FULL WARRANTY ON STAINLESS STEEL TUB AND INNER DOOR
For the lifetime of the product from the date of purchase, when this dishwasher is operated and maintained according to instructions
I have seen some Maytag (older) Dishwashers that had a 10-year warranty on the dishracks.
Samsung site states The warranty period for washing machines, washer-dryers, and tumble dryers is 24 months.
It pays to keep your warranty and bill of sale in a safe place. Or take a picture of the bill and the warranty page and create a document (folder) on your computer so you know you can lay your hands on it. Ask your sales rep which brands have the best warranty or after-sales service in your area.