Product review (5 stars): Whirlpool Replacement Icemaker
This was exactly the part I needed for my broken Whirlpool icemaker.  This kit came with several different wiring harnesses and attachment clips to choose from, but in my case, I was able to unplug the old wiring harness and plug it directly into the new unit.  I have a side by side and it was a little awkward to remove the old icemaker since there was not a lot of room to work.  But I was able to do the whole swap in about 15 minutes.  First, I'd advise you turn off the fridge.  I removed the three screws holding on the old icemaker and then using a small slotted screwdriver removed the old wiring harness that plugged into the icemaker.  I then removed a plastic bracket from the bottom that held the 3rd screw in place and attached it to the new unit.  Inspect your old unit to see the if your unit requires a cutout where the water lines comes into the icemaker.  This unit doesn't have the cutout, but it is prescored if you need a cutout.  All you have to do is use a pair of cutters to remove the plastic so it will fit your fridge.  I needed the cutout and while you need to be careful, it just takes a couple of minutes.  Check your old unit vs the new unit and adjust the water level screw to match your old unit.  Attach the wiring harness into the unit and screw the new unit in place.  With three screws, mine was already level.  If you had a 2 screw unit, you might want to visually make sure it was level.  After turning the unit back on, it took mine about an hour before the thermostat was ready and it started making ice.  Some folks have said it took theirs' a whole day to start, but in my case, within 24 hours I had a full ice drawer.  Like I said, about 15 minutes start to finish.  Update 12/8/2013  We've had this icemaker for about 18 months.  Noticed a burning smell coming from the fridge and discovered that icemaker heater was still on and harvest bar kept cycling around.  I unscrewed and unplugged icemaker and removed it from fridge.  Removed the front cover and discovered the little plastic wheel had a large burn mark on it that was all the way through.  Apparently something went south in the motor and I will have to get a new unit.  This unit has worked great until now, but I will have to get a replacement.  The last couple of weeks, the icemaker had been overfilling a little and the harvested ice was stuck together.  I guess I should have paid attention to this since it was a precursor to the unit burning out.  We have loved this unit, but just a cautionary tale to keep an eye on them.