On certain vehicles, the bolts that attach the driveshaft center support brace could loosen. If this happens, the front end of the driveshaft could separate.
Safety Risk
A driveshaft that separates could increase the risk of a crash.
Corrective Actions
Subaru will notify owners by mail and advise you to take your vehicle to a dealership to clean the bolt mounting surfaces for the driveshaft center support brace and install new bolts.