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How Long Does a Dishwasher Last?

The average life expectancy of a dishwasher is 9-11 years.

Here's the research:

National Association of Home Builders

According to a survey jointly conducted by the National Association of Home Builders and Bank of America estimating the average life of home appliances, the dishwasher has a life-expectancy of nine years.

National Association of Home Builders - "Study of Life Expectancy of Home Components", 2007, Retrieved December 12, 2010 from http://www.nahb.org/fileUpload_details.aspx?contentID=99359  

Maytag Warranty

The NAHB survey seems to be in line with Maytag's 10-year limited parts warranty available on its higher end models.

"Dishwashers Maytag | Refrigeration, Cooking, Dishwashers & Laundry Appliances ." Maytag | Kitchen, Laundry & Home Appliances . N.p., n.d. Web. 4 Dec. 2011. .

California Energy Commission

The California Energy Commission has estimated that you can expect to own your dishwasher for 11 years. They also state another interesting fact that washing dishes in a dishwasher uses 37% less water when compared to washing dishes by hand with the water running.

"Dishwasher: Energy Choices in the Home." California Energy Commission. N.p., n.d. Web. 4 Dec. 2011. www.consumerenergycenter.org/home/appliances/dishwashers.html