Originally Posted by Jeff@topgearsolutions
Don't find your problems, let them find you!
I bought my car with 1 mile on it. By 200 it had this so called siren noise, turbo's make noises, it's normal until you have a boost targeting problem, or you drive on the highway and its absurdly loud.
+1 on waiting for problems to actually materialize.
Again though, this is not a normal sound ANY turbo rebuilder/tech/service will tell you this within 0.5 seconds.