Product review (5 stars): Easy DIY repair, with a warning
Ordered a pair of these after both sides broke on my 20 month old KitchenAid dishwasher. Apparently, a lot of people have had these parts fail so it is likely a Whirlpool manufacturing defect (or just a really poorly made part). I won't bash the part because it is what you need and fixes the problem (at least temporarily). Anyway, replacing them was easy, maybe 3 minutes per side. A small, flat-bladed screwdriver will help with one of the clips but the others you can take off easily with no tools. Just keep track of the clips as you take them off and re-install in reverse order. A fast and easy fix at 20% of the cost of a service call.

One important note - the clips that held the wheels in place are the parts that broke off. At least two of these pieces of plastic, about the size of a flattened jelly bean, worked their way into the pump and filter housing and jammed up the dishwasher. I had to have a repair person come out, disassemble the screens and the pump to remove the pieces. Yes, this little piece of broken plastic caused the entire dishwasher to stop working. If it had been something I dropped in there, I'd have felt bad but since it was a KA piece that failed and then stopped the dishwasher, not so much. My advice would be to replace both sides as soon as even one of the wheels breaks off. FWIW, I called KA and even though the d/w was out of warranty, I was able to convince them to cover the service call for the problem the clips caused.