This is a BMW 1986 E24 635CSI 635CS check control unit. This module is an important component of your BMW's electrical system. It is responsible for monitoring your vehicle's various systems, such as lights and brakes, and alerting you if there is a problem. This check control unit is brand new and designed to fit your BMW model. It is manufactured to meet or exceed the OEM specifications for a perfect fit and reliable performance. Pulled from 1986 E24 BMW 635, condition is unknown since vehicle was scrapped at time of recycling.