Crikey, that's rusty. My 03 MG ZT doesn't have a single spot, even underneath - and that was made by Brummies!
The swirl flap issue was always a bit daft in my eyes - the ZT got the same engine without swirl flaps (as it was down-tuned) and they're pretty much 100% reliable - the 2 things BMW added to keep power up (VNT turbocharger and swirl flaps) are the achilles heel of the M47 when fitted to most BMWs of this era.
Good job lads.
Which autobox did they use in this model? Wondering if it's the same unit fitted to the auto diesel ZT.
Edit: And it's lived by the sea all of its life.