I had a motor go out on my dishwasher. When looking online it seemed common - apparently a shaft or ball bearing somewhere in it wears out in 2-3 years which makes it so it can't spin anymore. There were full instructions on how to replace this piece of the motor that costs a few cents.

That said, I noticed LG offered a 10 year warranty on the same motor, so I decided to buy a new dishwasher instead.