KitchenAid mixer is said to last for about 15 years. But since you are talking about a world-renowned brand known for its quality. You have the assurance that this product has lasted for 30 years plus. And you can make your mixer last for as long as well. All you got to do is take a little care of the appliance like it was your own child. Clean it and its attachments regularly, consider re-greasing it from time to time. Don't overuse it and definitely don't ignore any signs which might suggest that something is wrong with the mixer. While most importantly make sure that you have set up the appliance and its attachments right. Follow all safety measures and you'll have your mixer working just fine for a really long time.