We bought this Bosch because of its reputation for being quiet,
which it upheld until it stopped cleaning dishes.
Before yesterday, during wash cycles,
only a faint sound like trickling would be heard. Now, there is a sound
which is probably the circulation motor straining to move water,
but water is not moving fast enough to spin the spray arms.
Pressing the two buttons for "Cancel Drain" cause water removal as usual.
After removing the tube assembly, no blockages were found.
No debris can be felt or seen at the circulation pump inlet in the sump.
Based on other threads, this appears most likely a circulation pump
impeller failure.

Meanwhile, I notice small black dots sticking to sump plastic
which can be smeared, so may be bits of deteriorating rubber seals.

Over 9 years, the only repairs this dishwasher has needed were
removing debris from the drain pump impeller and
replacing the detergent cup latch spring,
so I am not motivated to buy a new dishwasher

Since AP2802376 circulation pump repair kit installation appears pretty invasive,
what other seals should I also consider replacing while in there?
Sump gasket AP2802361 is a prime candidate,
but sump clamp AP2802443 is out of stock.
What is the likelihood of successfully reusing the existing clamp?