Kitchenaid Dishwasher - how to replace air inlet

How do I replace the air inlet at the bottom of the door? Sorry if this is a double post, my first post is not showing up in the list of new threads.

I see this has been asked on the forum more than once, but no one ever answered the question.

You may not be getting a reply because no one can find any info on the given model number. At least I cannot.
I tried AppliancePartsPros and the Whirlpool site.

Please check it and if it is incorrect re-post with the correct number.