
Originally Posted by
numbah5
Before we jump into conclusions, I just want to ask the TS: do you let your turbocharger cool down after prolonged high speed runs by idling the engine for a minute or 2 before switching it off? Or do you switch off the engine immediately after such high speed runs? I suspect that if you're experiencing a significant power loss, your turbocharger might be "cooked" already. That isn't covered by warranty. Even other car brands will deny your warranty claim if that's your case.
If the power loss isn't significant, the casa might have misdiagnosed the problem. You might have a case of EGR valve clogging due to soot. That is easy to fix and relatively inexpensive to changing a damaged turbocharger.