quick update to this thread , a friend of mine has an orbea wild fs with the bosch gen 4 motor that is nearly 3 years old (2 year warranty on the “e” side of things) , up until now he’s had no problems with the “e” side of things, but recently it started throwing 500 errors when it was turned on, and was essentially dead.
He took it to his local bosch ebike dealer (not an orbea dealer), they had a look and sent the report off to bosch , and the upshot is he’s getting a new motor put in for £100 – top work from bosch, just wanted to put this bit of good customer service out there for people to see.