VEHICULAR REAR SLIDER WINDOW ASSEMBLY WITH UPPER RAIL FILLER HAVING AT LEAST ONE ANGLED END

A vehicular slider window assembly for a vehicle includes at least one fixed window panel and a movable window panel that is movable along an upper rail and a lower rail at the at least one fixed window panel between a closed position and an opened position. The upper rail includes a channel, and a filler is disposed in the channel of the upper rail. The filler includes a filler body having opposite side walls and at least one obliquely angled end, and the filler includes compressible and flexible and deformable elements along respective ones of the side walls. The obliquely angled end or ends of the filler provide an indication as to whether the filler is disposed in the channel of the upper rail at the correct orientation relative to the upper rail or the incorrect orientation relative to the upper rail.