2001 4WD Radiator hose that comes underneath. It connects between the radiator and the engine. Used for less than a month and I replaced it. The reason for replacement was a leak, and I thought it was damaged, so I got a new one. When I went to remove the old one, it turned out it wasn't installed correctly, meaning the leak was due to poor installation. The hose is 100%100 sound. (If there is any leak or anything else, return it and get your money back)