Subaru will be contacting the owners of certain 2019 Ascent, Crosstrek and Forester SUVs regarding a problem affecting the engine in their vehicle.
According to the defect report, the material used for the PCV valve case was changed from aluminum to steel on the engine production line beginning October 2018. The difference in metal combined with heating and cooling experienced during regular vehicle use could cause a gap to develop between the PCV washer and valve case. In addition, other components surrounding the PCV case could press into the case, potentially contributing to the separation of the valve components over time. If this happens, oil will enter the engine combustion chamber, changing the appearance and/or amount of tailpipe exhaust. If the vehicle continues to be driven under these conditions, drivers may experience a complete loss of engine power.
Dealers will inspect the PCV valve, and if the valve has separated, the short block engine will be replaced. Subaru’s number for this recall is WUW-08 and the NHTSA campaign number is 19V-856.