vios 3 sport does fit, it just clears the door trim. but it does sit high.
i found that by the time you add the sliders its just too high for the factory mounting points, elbows do hit the seat and it becomes quite hard to drive
lowering would also clear the door better by the look of it.
i went back to the stock seat until i modify the floor mounts, random pic to show height against passenger seat. any lower is touching floor mounts.
hope it helps.