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Set 42201 Deep-Sea Research Submarine
Technic

LEGO® Deep-Sea Research Submarine

Set 42201 is a Technic build of a deep-sea research submarine, built around moving mechanics rather than minifigures. At 413 pieces with 111 unique elements, it sits among the smaller to mid-size Technic sets. Black, red, yellow and blue combine for a look close to real research and rescue vessels.

Set number
42201
Year
2025
Pieces
413
Minifigures
0
Theme
Technic
Different parts
111
What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 111

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 (10)

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

Description

Built for function, not figures

Technic sets like this one put the mechanics front and centre instead of minifigures or play scenes. The submarine combines standard Technic building techniques with details that echo real diving vehicles, such as propellers, grab arms or moveable rudders. With 413 pieces there is enough room to fit in working features without the model becoming cluttered or fragile. Builders who enjoy turning, sliding and testing moving parts rather than just assembling a static shape will find that focus reflected throughout the build.

A colour scheme borrowed from real research craft

Black forms the main hull colour, while red and yellow work as high-visibility accents, much like the markings used on genuine research and rescue vessels. Blue appears on selected elements and reinforces the underwater theme. Out of 413 total pieces, 111 are unique, a fairly high ratio that reflects the specialised parts needed for a functional Technic model rather than a purely decorative one. Exactly where each colour sits is laid out in the full parts list further down this page.

A manageable build for a weekend

At 413 pieces, this submarine falls into the smaller-to-mid range of the Technic catalogue, so it can be finished in a single sitting without the scale of the largest sets. That makes it a reasonable entry point for builders newer to Technic who still want moving features rather than a static shape. It stays compact enough to sit comfortably alongside other vehicle models on a shelf, without needing much display space of its own.

Pairs well with other vehicle builds

Without minifigures included, the submarine slots naturally alongside other technical or maritime sets, whether ships, cranes or further underwater vehicles. Its manageable piece count also makes it a good weekend project rather than a multi-session build. For a precise breakdown of which elements and colours are used where, the parts list on this page gives the complete picture, useful for sourcing individual pieces or checking compatibility with sets you already own.

FAQ

Does the set include any minifigures?
No, like most Technic sets it focuses on the model's mechanics rather than figures.
How big is the build?
It comes with 413 pieces and 111 unique elements, a manageable but feature-rich size.
What colours make up the model?
Black forms the base, with red, yellow and blue as accents; the exact breakdown is in the parts list on this page.

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