The Body Control Module (BCM) is a computer component in a vehicle that acts as a gateway between electrical circuits in a car and the main engine control unit. Its primary function is to monitor and control various electronic components in the vehicle, such as door locks, power windows, interior lights, and other accessories. The BCM also provides security features, such as keyless entry, immobilizer, and anti-theft systems. The BCM is responsible for monitoring the vehicle’s systems, transmitting and receiving data, and relaying commands to various components. It also works in conjunction with other onboard computers to ensure that the vehicle runs properly.