Product review (5 stars): Compatible with our Kenmore dishwasher
This spray arm (together with the 8539324 rack mount, also available on Amazon) was a perfect replacement for the spray arm in our older Kenmore dishwasher, which had become clogged with soap and eventually broke while disassembling it for cleaning.  Installation was easy to figure out despite the lack of instructions.  Just make sure to get the rack mount as well.