If you have an older dog then this could be the answer. The current option is to get a ramp, but they take up space in the trunk are heavy and needed to be unfolded and refolded at every stop. The dog step could be left in place. It’s an all plastic part weighing only 5Kg, and can cope with a 100Kg animal. Also could be useful for loading a roof or cleaning the car as long as you don’t exceed the limit!