There is no lower door seal as such, only a drip guard, part number 1801629, if you haven’t been out to this one and the complaint is leaking in the corners of the door, it’s always the lower spray arm that splits causing this (Brandt manufacture)
Been out to this D/W today. Leaking like a pig from the corners. It sound very feasible that it is the sprayarm as the leaks come in waves. The lower seal is definately split though in the middle and is leaking also. I had a quick look at the lower sprayarm and it seemed ok. Maybe I need to look harder! Less of 8) and more of 😯