An electronic self contained viscous liquid dispenser includes a housing defining an internal liquid reservoir. A dispensing pump mechanism is carried by the housing and disposed in liquid communication with the reservoir. The pump mechanism has a delivery end disposed for delivering metered doses of viscous liquid from the reservoir. A mounting assembly is configured for mounting on a supporting wall structure, with the housing being releasably attachable to the mounting assembly. An electronic actuating mechanism is carried by the mounting assembly and includes a motor driven actuator that engages with the pump mechanism upon insertion of the housing into the mounting assembly. A motor and associated power supply circuitry is carried by the mounting assembly, with the motor being in driving engagement with the motor driven actuator.