Hi all!!! im now back to the VAG scene after a short diversion via BMW. I treated myself to a beautiful a4 avant quattro with the 2.5 v6 tdi engine. The car is in nearly new condition with pretty much every option available (when it was new) 2004. Now the rubbish bit, the car has full service history and showing the intercoolers were replaced mid last year. Christmas eve, POP!!! big flash from the front of the bonnet and intercooler drivers side has blown its lid right off??? limped the car to my bros,removed cooler and tried a roadside rebuild...lasted 2/3 miles:-( so i know im in for a bill for a new cooler but i dont know why this would happen??? can anyone offer any advise please??? broken wastegate/dump valve??? over boost problem??? or matbe as i suspect, inferiour part??? many thanks in advance, im sure youll all be helping me loads in the future. Matt.