Hiya AC,
Its Extensive rust on Middle Rear & Nearside Rear BRAKE LINES themselves.
Yes - the outer panel near the wheel arch is rusted through as you can see. Just tapped with backend of a screw driver, nice chunk fell out. The "inner" part behind seems OK at the moment but merits further investigation.
From my reading it seems quiet alot of the early 00's MX5s are showing serious rust in sills and also chassis. I think mine is in serious trouble TBH. Rust from inside out ..
In fact I have been looking at "upgrading" to an 08 MX, but am getting really scared of these rust stories in MX5s in general - its pretty extensive in general in MX5s, maybe all Mazdas. I reckon this will put quiet alot of MXes into the scrap yard.
Im beginning to consider NOT going for another MX now