Drive-by-wire systems are consists of bus systems, microprocessors, electrical actuators, and sensors. Replacing rigid mechanical components with dynamically configurable electronic elements triggers an almost organic system wide level of integration. For the safety design, integration methods including reliability and fault-tolerance are required. In general, the fault-tolerance function is realized by redundancy of the communication module. In this paper, we introduced the concept and design methodology of an IEEE 1451 based dual redundant module as one method for realization of the redundancy in CAN network. Also, we implemented the experimental model for the brake-by-wire system to observe feasibility of the dual redundancy module.