rotting

I have an 07 TDI FR with 37k on the clock and at the 30k service the dealer informed me that there was corrosion on the back box of the exhaust, I looked under the car at the weekend and now have a 2" diameter hole in the outer skin of the box. Before I start having a go at the Dealer (as I...

I recently had my car M.O.T'd and they have put an advisory on for the exhaust It said "rear exhaust, part of the system deteriorating" Basically i have a Powerflow catback system and after closer inspection, the back of the backbox where it meets the centre section has corroded and looks...