The 2012 Volkswagen Passat radiator keeps coolant from reaching too high of a temperature and losing its efficacy. Radiator trouble comes in a few forms, but generally they will either leak fluid or simply cool the fluid less effectively. The resulting low coolant levels or hot fluid can make your engine overheating. Check out these 2012 Passat radiators and buy the right one online, or at an AutoZone near you.