A pedal assembly comprises a pedal arm; a pedal plate provided on a second end of an elongated lever structure of the pedal arm; a vehicle mounting bracket; and a retainer. The retainer is installed on the pedal arm and is configured to operatively connect the pedal arm and an end portion of an operating member so as to transmit the movement of the pedal arm between a first and a second arm position to a functional system. The retainer is in an open position for insertion of the end portion of the operating member therein. The retainer is configured to move or to be movable from the open position to a closed position in which the retainer retains the end portion of the operating member received therein. The retainer is movable from the open position to the closed position by insertion of the operating member therein.