UPDATE 6/2/23: The repair didn't last, the impeller was unglued again, probably by me using the high temp 65 C wash programme. Sorry guys.

This is how I fixed the circulating pump on my Miele G1378SCVi dishwasher. The pump impeller had come apart, the pump wouldn't produce enough pressure and the dishwasher detects low pressure and produces F78 error (circulating pump error). Then it stops the washing, drains the water and ends the washing programme.

DIY fix as the part is very expensive, about 400euros. Only the impeller was split, rest of the part was OK.

Industrial adhesive used: Permabond TA4611, 25ml epoxy.

Since the repair the dishwasher has been working flawlessly. If it stops working I'll update the description.