Bought my 12 in October of 11, build date May of 2011 5k miles no issues even with all these mods:
2012 GT Premium, 6 speed manual, 3:31 Gears Ford Racing Strut bar, Steeda sport springs, Steeda heavy duty strut mounts, Takico D-spec adjustable struts and shocks, MGW Shifter, Roush Axle...