Where is the relay box on a BMW 2001 740i?

The relay box on a 2001 BMW 740i is located in the trunk, behind the left side panel. To access the relay box, you will need to remove the panel by unscrewing the two screws that hold it in place. Once the panel is removed, you will see the relay box. The relay box is a black plastic box with a number of relays inside. The relays are used to control various electrical components in the car, such as the headlights, wipers, and horn.