A faulty body control module can lead to bad electrical functions. For example, the lights and wipers go off as well as a decline in vehicle performance. But the worn body control module needs to be repaired or replaced for better Toyota performance. The body control module (BCM) controls all electronic units in the vehicle. Signs of a bad body control module include a drained battery, security system problems, warning lights, and dashboard cluster errors. A lot of quality Toyota parts are offered online. We are here for you 24/7 with great Toyota parts.