Fuse Box Diagram BMW Fuse box diagrams (location and assignment of the electrical fuses and relays) BMW. Fuse box diagram BMW 3 E90 - fusesdiagram Fuse 3 (50.0 A) – Coolant pump Fuse 4 (40.0 A) – Valvetronic relay Relay R1 – Valvetronic relay Relay R2 – Ignition relay . fuse box diagram (type 5). Fuse and relay box diagram BMW 3 E46 Fuse box in the glove compartment BMW E46. Open the glove compartment and turn the two white quick-release fasteners outward.