Owned 3 turbo 4’s starting in 1985 until now. Never had an intercooler, intake hose or turbo failure. Combined mileage on the first 2 was 195K, years owned 30 total (17 plus 13), the 3rd was bought used and now has 32K on it with no problems. The last 2 had essentially no turbo lag and got over 30 mpg highway in 3700 lb sedans.