LEGO Set 40803-1 – Optimus Prime Robot & Vehicle: Alternate Build Possibilities

The LEGO BrickHeadz 40803-1 Optimus Prime Robot & Vehicle might look compact at first glance, but its curated palette of plates, brackets, tiles, and printed details hides a surprising amount of creative potential. Because the set is engineered to capture the essence of a transforming hero in a small footprint, you get a parts mix that naturally lends itself to both character builds and micro-scale vehicles. Those small SNOT brackets become anchors for expressive faces and armor; the tiles and slopes make sleek bodywork for trucks, mechs, and sci-fi pods; and the color blocking gives instant “readability” even when you’re working at a tiny scale.

For alternate builders, that means two big advantages. First, the set enables multiple play styles: cute chibi robots, super-deformed mechs, pocket-size vehicles, and display-ready vignettes are all within reach using just the included selection. Second, the set’s symmetry and repeat elements make redesigning sub-assemblies fast—swap a few connections, rotate a bracket, or re-tile a panel, and you’ve got a fresh front grille, shoulder pad, or trailer sidewall. You can push toward poseable limbs with ball-joint suggestions, reinforce small frames for tabletop durability, or lean into display aesthetics with tiled finishes and clever part offsets. And because this BrickHeadz release blends character and vehicle DNA, it’s ideal for “duo” alternates (hero + accessory), micro dioramas (truck + roadside detail), or modular add-ons like trailers and weapon packs. Below you’ll find hand-picked alternates and mods created for this set—each with a direct link to the designer’s instructions so you can rebuild, remix, and roll out your own ideas.

G1 Optimus Prime

Designer: PaulvilleMOCs
Get the instructions with link to the model: https://rebrickable.com/mocs/MOC-230876/PaulvilleMOCs/g1-optimus-prime/

Trailer for BrickHeadz Optimus Prime

Designer: ClintM
Get the instructions with link to the model: https://rebrickable.com/mocs/MOC-212010/ClintM/trailer-for-brickheadz-optimus-prime/

Mini Truck (40803)

Designer: mesjaam
Get the instructions with link to the model: https://rebrickable.com/mocs/MOC-211434/mesjaam/mini-truck-40803/