Abstract: An undercarriage sprayer is provided for automobiles and the like. The sprayer has a T-shaped frame with a castor wheel at the base of the T and two steerable wheels at the ends of the cross bar. A handle connected to the frame at the intersection of the T is used to manipulate the sprayer and to steer the wheels through the use of a rotating hand grip. Spray nozzles are spaced along the base arm of the T-frame and may be arranged to pivot from side to side under the control of an operator. In other embodiments, the nozzles may be rotating spray heads.