Can the set switch between robot and vehicle without buying extra parts?

Yes, both forms are built from the same 237 pieces; the set is designed around rebuilding between the robot and truck modes.

Does this set include any minifigures?

No, 40803 has no minifigures. The entire set forms the single BrickHeadz figure of Optimus Prime.

How many unique parts does the set use?

Out of 237 pieces total, there are 106 unique parts, mostly in light bluish grey, blue, red and black.

Brickheadz

LEGO® Optimus Prime Robot & Vehicle

Optimus Prime Robot & Vehicle 40803 is a 2025 BrickHeadz set that turns the well-known Transformers leader into a compact, boxy figure. Built from 237 pieces across 106 unique elements, it can be assembled as either the upright robot or a flatter truck form, with no minifigures involved.

Set number: 40803
Year: 2025
Pieces: 237
Minifigures: 0
Theme: Brickheadz
Different parts: 106

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 106

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (12)

These extra parts come with the set in case one gets lost.

Alternative models

Fan models by Rebrickable users that you can build (mostly) from this set’s parts. Instructions are available from the designers.

All 3 ideas at Rebrickable ↗

What can I build with it?

Description

Two builds from one part set

What sets 40803 apart is its dual build: the same 237 pieces can go together either as the standing robot, complete with the signature BrickHeadz head shape, or as a lower, truck-like vehicle form. Owners can switch between the two rather than being stuck with a single fixed model. That's unusual for the BrickHeadz line, where most figures only ever take one shape, so this set is a rare case of the transforming idea behind Optimus Prime carrying over into BrickHeadz's blocky, oversized-head style. For collectors interested in transforming mechanisms, that switch is the whole appeal, since most BrickHeadz figures never move beyond a single fixed silhouette.

Colours and parts breakdown

The colour scheme of light bluish grey, blue, red and black closely tracks the character's familiar look, with light grey forming the base, strong blue and red covering the recognisable panels, and black used for frame and detail pieces. At 106 unique parts out of 237 total, the set carries an above-average variety of elements for its size, most of it in service of the switch between robot and vehicle modes. No minifigures are included, since the entire set is built around this single figure. That mix of a few base colours with many specialised pieces keeps both build modes visually distinct despite sharing so many parts.

Reading the parts list

The full parts list on this page lays out all 106 unique elements with their colours, which is useful for working out which pieces support which of the two build modes, or for sourcing replacements if anything is missing. Because light bluish grey, blue and red also appear across many other vehicle and BrickHeadz sets, this list can double as a starting point for custom builds or swaps, particularly for anyone mixing parts with other Transformers-themed or mechanical models. Anyone planning to rebuild between the two modes repeatedly can use the list to spot exactly which joint and connector pieces do double duty across both forms.

FAQ

Can the set switch between robot and vehicle without buying extra parts?: Yes, both forms are built from the same 237 pieces; the set is designed around rebuilding between the robot and truck modes.
Does this set include any minifigures?: No, 40803 has no minifigures. The entire set forms the single BrickHeadz figure of Optimus Prime.
How many unique parts does the set use?: Out of 237 pieces total, there are 106 unique parts, mostly in light bluish grey, blue, red and black.

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