So back a couple months ago I was in a little fender bender in some icy weather and I damaged my 2001 Lexus ES300. I smacked the guardrail and did some damage to the front driver's side of the car. Luckily I think most of the damage was fairly minor as I was able to drive it home. But, as I am looking to to do what repairs I can myself, I saw that behind the front bumper and in front of the front driver's side tire is a small white reservoir or tank that has a crack running down the side of it. For the life of me I can not figure out what this tank goes to or is for. Can anyone help me out by telling me what it is and what it does? Thanks in advance!