Product review (5 stars): Great Fix - After 2nd Try
When the correct part finally arrived, it took about 20 min to get it back in the washer and all has been well for several washes as of this writing.

In recent weeks it had required several tries to latch the door to start each wash.  Videos on the internet showed me where the problem might lie, and guided an easy removal of the part to check its status after 5 years of use.  It turned out that the lower part of the plastic unit was badly cracked.

I ordered the needed replacement part (DC34-00024B) on Amazon and it was "fulfilled" by a supplier who sent a different part that had two labels: 1) a faded label stuck directly on the package showing the Part Number as DA31-00146H; and 2) what seemed to be a freshly printed label applied over the original  showing the Part Number as DC34-00024B.  The part I was sent had no resemblance to the part I needed.  I returned this incorrect part to Amazon, and warily ordered the DC34-00024B part again. The second time (from a different supplier) was the charm.

As I said above, with the correct part in hand it was a quick replacement with the help of internet videos.  The washer was back in action immediately.

BTW - after the washer was functional again, I finally used the Pure cycle to clean the inside washer unit after years of use.  It is like a brand new washer!