Product review (5 stars): A successful DIY project on my KUDS30IXSS4 Kitchen Aid dishwasher
When the flimsy upper rack roller on my Kitchen Aid KUDS30IXSS4 finally broke, I decided to get a replacement kit to fix it myself. I am terrible at DIY projects, and was skeptical whether this part would properly fit my Kitchen Aid dishwasher. I decided to order this through Amazon anyway.. and am glad I did. Replacing the broken roller assembly was a breeze and took about 15 minutes. The replacement also looks sturdier. To other DIY-challenged readers, here's a couple of tips:
1)you tube has an excellent step-by-step video showing how to remove the old piece and install this kit. Search "w10712394 appliance video". See video posted by appliancevideo.com
2) You need a T15 standard Torx screwdriver to install the kit. The Whirlpool kit does come with an "adapter" that allows you to use a Phillips screwdriver instead, but it is probably a worthwhile investment to spend the extra $3 to get the T15 Torx screwdriver.

Good luck!