2018 BMW 3 Series F30 Fuse Box Diagram

Right-hand rear corner of the engine bay against the bulkhead (left-hand corner on right-hand-drive cars), in the box under the cowl cover. 2018 is the last model year of the F30 saloon (production ended in October 2018, the G20 replaced it in March 2019) while the F31 Touring and F34 Gran Turismo ran on into 2019; the only allocation card any source publishes for these cars is edition 9 228 158-02, the sheet the 2013 cars carry, kept next to the rear fuse box.

The positions follow the card's plate: the upper row holds 18-35 and the lower row 42-56, both counted from the left; the wide fuses on the left edge are 57-63 and on the right edge 64-70, counted from the top; 36-41 stand between the two relays. No fuse is fitted at 30, 35, 38, 39, 49, 51, 59, 60 or 61.

Under the boot floor, offset to the right, with the fuse allocation card in the holder on the box cover; the card is printed for the individual car. Cars of the final model year (saloon production ended October 2018; the F31 and F34 continued into 2019) are covered by the same card edition, 9 228 158-02, that this page draws from - no later edition for the F30 has been published anywhere we could find.

The plate numbers the box in rows and columns: 100-104 and 105-111 along the top, 112-117 in the middle on the right, 118-120 and 121-123 lower left, 124-135 and 136-142 along the bottom (rows left to right); 143-148 and 149-153 down the outer left, 154-159 down the inner left and 160-166 down the right (columns top to bottom). Positions 101, 102, 105, 108-112, 115, 118, 119, 129, 131, 133, 134, 136, 138, 156, 157, 158 and 166 are unoccupied.

On the rear electronic module above the battery, right-hand side of the boot behind the trim panel; the last F30 model year keeps the module and its five fuses, as documented by card 9 228 158-02. A blown rear-window heater or rear power-window fuse is looked for here, not in the box under the floor.

A single column of five mini fuses at the module's right: the housing numbers the slots upward from 1 to 5 and the card pairs them with fuses 82 (1), 85 (2), 83 (3), 84 (4) and 80 (5); 81 is skipped. The relays are the large blocks to the left.