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The development of technology today improves the efficiency of energy use in order to reduce energy use and pollution. Electronic control began to be adapted to the vehicle's system, where this system added sensors and electronic drives to the vehicle nowadays called Drive by Wire. Drive by wire was one of the technologies used to increase efficiency and reduce mechanical losses in vehicles. Its application to the throttle is called Throttle by Wire. Applying Drive by Wire technology in vehicles is one step toward more efficient vehicle technology. These, namely electric and autonomous vehicles, increase the efficiency of various aspects of all systems on the vehicle being controlled electronically. Electronic throttle technology in vehicles can increase fuel efficiency and reduce exhaust emissions. This paper uses a throttle by wire design using a DC and BLDC motor. The DC and BLDC motors used operate at 12V voltage. The speed of each motor is 3000 rpm with control using pulse width modulation (PWM). The first stage of the research is to identify the torque requirement and the opening angle of the throttle valve. Furthermore, simulations are carried out to test the performance of DC and BLDC motors. Design testing is carried out in 3 stages, namely, up-down test, ramp test with step, and ramp test. Throttle-by-wire performance is simulated in operation for 1 minute. The performance of the DC and BLDC motors on the throttle by wire design was compared. Comparison of the simulation results obtained response time, overshoot, and undershoot at the measured angle of throttle by wire between the use of DC and BLDC motors. The up-down or wide open and close throttle test results on a DC motor when the throttle angle is 90° to 0° require a short time. However, there is a reasonably large undershoot. At the same time, the BLDC motor shows good results without overshoot and undershoot, even though the delay time is longer. Then DC motors. Testing ramp with step on throttle by wire using a DC motor and BLDC shows excellent results with a fast response time without overshoot and undershoot. Besides, the ramp test results show that using the BLDC motor is more responsive in adjusting the opening and closing of the throttle valve. [ABSTRACT FROM AUTHOR]