I'll start by saying I don't know a ton about my turbo engine and the problems it could warrant. Was on my way to work today and lost all boost. Turbo was making a little higher than usual winding sound, but I could also hear air flow which sounded like it was not making it into the engine. I initially thought it was a leak or an issue with the waste gate. Took it in to the dealership and got a call an hour later saying the turbo is done. They didn't elaborate, but at least I get a new one for free. I just hadn't heard of many turbos failing at 25k miles. Little disappointed as I never had an issue with an 04 wrx I had for 5 years.