Set PricingExpected Good Investment
Still available at retail
Set Facts
- The Deep-Sea Research Submarine toy set includes realistic features such as steering, 3 spinning propellers, 3 air tanks, and a cockpit with a seat and controls.
- The submarine model has an extending arm designed to grab and lift the barrel accessory.
Regional Retail Prices (LEGO.com/Store)
Deep-Sea Research Submarine Reviews
“On to one of 2025’s most unusual Technic sets, the 413-piece 42201 Deep-Sea Research Submarine. Reminiscent of the largely forgotten 1997 Divers sub-theme, 42201 looks rather un-Technic-y, despite being constructed almost exclusively from Technic pieces. A selection of cogs... More operate the pitch of the propellors and the grab-arm.”
BrickEconomy Member Review
“The LEGO Technic Deep-Sea Research Submarine (42201) is a highly functional set packed with intricate mechanisms and a fresh, colorful design. With rotating propellers, a tiltable assembly, and a working grabber arm, the set offers a hands-on building experience and great play value. The unique sand-blue elements and clever engineering make this set a standout.”
Theme Analysis
Community Stats
Deep-Sea Research Submarine currently ranks #515 out of the top most owned sets in Technic.
About Technic

TECHNIC is one of The LEGO Company's main lines based on creating detailed model machines and mechanical toys with specialized beams, axles, gears and connectors and primarily designed for older children and adults. The theme was first introduced as the Expert Builder series in 1977, but was officially renamed as TECHNIC in 1984. TECHNIC is still an active theme, and is one of the longest running themes in LEGO history. While most TECHNIC sets are vehicles that use pieces to mimic real vehicles, such as engine pieces, suspension, pneumatic, and transmission pieces, the TECHNIC parts have been used by various other System themes as well as LEGO Mindstorms.
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Inspire kids aged 9 and up to explore the secrets of the oceans with this Deep-Sea Research Submarine toy set (42201). The model is packed with features like those found on real submarines, including steering, 3 spinning propellers, 3 air tanks, and a cockpit with seat and controls. The submarine features an extending arm to grab and lift the barrel accessory as kids play out their own sea-bed adventures.
This submarine model kit comes from a range of LEGO Technic sets which feature realistic movement to introduce young builders to the universe of engineering. This set makes a great gift for kids who enjoy buildable vehicle toys.
Let the LEGO Builder app guide your child on an intuitive building adventure, allowing them to zoom in and rotate models in 3D, save sets and track their progress.
Submarine toy set for kids aged 9 and up Let young science and engineering fans create their own deep-sea adventures with this LEGO Technic Deep-Sea Research Submarine toy
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