2013-2017 Edge/MKX/Flex/MKT/MKZ/MKS/Taurus/Taurus Police/Explorer/Explorer Police/Continental vehicles equipped with a 3.5L or 3.7L engine, all wheel drive (AWD) and a power transfer unit (PTU) that is being repaired or replaced for an internal failure must also have the vent hose replaced due to contamination in the hose.
