If you notice water dripping from under your car, it could be coming from the engine cooling system, the air conditioner, or even a leak in the exhaust system. If the water is clear and odorless, it's most likely from the engine cooling system. The water could be coming from a cracked radiator hose, a leaking water pump, or a faulty radiator cap. If the water is rusty or has a sweet smell, it could be coming from the air conditioner. The water could be coming from a leaking condenser, evaporator, or hoses. If the water is hot and has a burning smell, it could be coming from a leak in the exhaust system. If you're not sure where the water is coming from, have your car checked by a mechanic.