Product review (5 stars): Amazon is Amazing!
This part arrived FAST thanks to Prime and was a perfect replacement for the failed oven ignitor on my KitchenAid convection oven.  I had searched the regular Whirlpool repair products and saw 2 different ignitors for my oven.  The customer rep for them was worthless as she had no clue either as to which was the correct igniter so I ordered both.  The one I didn't need arrived first after 5 days so I had to call them to find out where the right one was in their system... not wanting to take ca chance, I searched for the part on good old Amazon!  It was less expensive and arrived in 2 days (other part from the Whirlpool place arrived three days later than the Amazon part's arrival.

For others who need an ignitor for this model of oven, the more expensive one (about $110) is for the top burner of the upper oven.  The lower burner of the top oven and the convection oven is the less expensive part (about $50).  Replacement is fairly easy - first turn off the gas AND unplug the range's power cord!, pull the oven out and unscrew about 8 hex screws (a cordless screwdriver recommended), then remove the back metal panel - there is a gas shutoff rod that you will need to carefully remove as you remove the panel.  Locate the connector to the ignitor you need to replace (you may need to go to the next step to determine which wire set to remove).

Next, inside the oven, remove the oven racks, slide the enamel burner cover to the right and remove it.  Then remove the thumb screw holding the cover plate and then 2 hex screws holding down the burner manifold.  Unscrew the 2 screws holding the old ignitor on the gas manifold and gently remove the gas manifold, leaving the ignitor in the oven - push its wires through to the back to help identify the proper connector.

Then from the back, unplug the ignitor, then from the front remove it.

Attach the new ignitor to the manifold with the 2 screws removed from it.  Be VERY gentle with the ignitor and do NOT touch the element!  from the oven front, position the manifold in place and thread the wires through to the back of the oven.  Neatly position the wires being careful to not damage or pinch them - replace the manifold and tighten, then the rest of the components.  From the oven rear, plug the new ignitor into its connection you unplugged earlier.  Replace the back of the range and the gas shutoff arm, and reverse the removal steps.