The pipes appear to be installed early on in the original assembly sequence and Mazda probably didn't envisage it having to come out in a hurry. The brackets are part of the pipe so there's a fair few bits to strip off to make access possible and to steer the new pipe into place - without kinking ital & chris wrote:Mmmmmmm we have a slight leak from junction near rear heater. Hope it's just one of our silicone hoses weeping and not that pipe work.

That perforated bit on mine is the rear part, under the rear of the driver's seat.