There are several possible locations through which the water may fall into the niche of the Hyundai Tuson spare wheel. In this list: the rear door seal, the glass and the poorly sealed welds of the body.
There are also cases of leaks in the area of the rear anchorage of the railing. Often the water runs in the niche of the spare tire underneath the plating, so the plastic is not visible. It's best to remove the sheathing and look for traces of the leaks underneath.
