Official LEGO® image · © LEGO Group and/or the respective rights holders. Source: LEGO Italy ↗

Technic · SET 42212

Ferrari FXX K

A Ferrari FXX K with butterfly doors, a differential and an engine. This Technic project introduces mechanisms beneath red track-car bodywork.

Pieces: 897
Release year: 2025
Theme: Technic
Set number: 42212
LEGO recommended age: 10+
LEGO retail price · Italy: 59.99 €

View on LEGO Italy Official building instructions

Available at LEGO Italy when checked on 23 October 2026. Availability can change. Check the store for the latest information.

Retail price reported by the LEGO source for the stated market. Check the store for current price and availability; this does not establish the launch price. LEGO ↗ · Reference checked on 23 October 2026

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Official English name verified at: LEGO English catalogue ↗ · Checked on 24 October 2026.

TIME TO BUILD

How long does it take to build Ferrari FXX K?

Individual build

A starting point for planning your build. Times for each experience level are editorial estimates, not measurements submitted by HowLongToBuild users.

Editorial estimate informed by external reports

Beginner

≈ 7 hSuggested range4 h 30 min – 10 h 15 min

Intermediate

≈ 4 h 30 minSuggested range2 h 45 min – 6 h 45 min

Experienced

≈ 2 h 45 minSuggested range1 h 45 min – 4 h

Based on one person building the set for the first time, following the original instructions and using numbered bags where supplied. Includes normal piece-finding and minor adjustments; excludes long breaks, filming, dismantling and modifications. Sources may use different methods. This range is neither a statistical interval nor a limit: your build may take less or more time.

How we estimate times · sources and method

Approachable mechanisms with numerous connections. Align the differential and pistons before adding the panels. The three central durations are model-specific editorial assessments. Planning ranges extend approximately from 65% to 145%, rounded to quarter-hours; they are not measured experience-level averages or guaranteed limits.

Sources do not always specify the builder’s experience. The three experience bands are our editorial assessment, based on the complexity of the set and individual accounts where available.

The Bricksmith · Ferrari FXX K ↗
The author’s bag-by-bag log totals 2 hours, 56 minutes and 51 seconds. It records one personal build, not a universal duration.

Checked: 23 ottobre 2026 · Method v1.0 · Limited reports; not a statistical average.

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MAKE ROOM FOR YOUR NEXT BUILD

How much display space does it need?

Model or component measured by LEGO

Height: ≈ 8 cm
Width: ≈ 12 cm
Depth / length: ≈ 29 cm

These measurements refer to the model or component in the original specification below. Other builds, poses or arrangements may need additional space.

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Which model was measured? · original Italian specification

Dimensioni: un set di 897 pezzi con modello di auto che misura 8 cm di altezza, 29 cm di lunghezza e 12 cm di larghezza

Approximate assembled-model measurements, not packaging dimensions. Allow extra room for handling, moving parts and the display stand. The comparison uses the measured model’s overall footprint, allows a 90° rotation and does not assess stability or shelf load. Source LEGO ↗ · 2026-10-29

BEYOND THE BRICKS

Did you know?

The model, the history, the ideas

Inside the set

An opening cover over the V12

The engine has moving pistons visible beneath the opening cover.

LEGO source

Doors that change the silhouette

Butterfly doors accompany the differential, providing functions to check beyond assembling the bodywork.

LEGO source

Beyond the set

The stories, places and inventions behind your build.

Two power sources behind the total

The FXX K’s stated combined output includes both its V12 and its electric motor.

Read the full story

Ferrari’s technical sheet separates the V12’s 860 CV from the electric motor’s 190 CV, giving 1,050 CV combined. The headline total comes from two contributions. Reading it as combustion-engine output alone would conceal the hybrid architecture described by the manufacturer’s own specifications.

Ferrari

A circuit car without a championship

The FXX K belongs to the non-competitive XX programme, linking client track driving with development.

Read the full story

Ferrari describes XX as a non-competitive owner-test-driver programme on circuits across Europe, Asia and North America. LaFerrari-based FXX K deliveries began in the second quarter of 2015. Track driving can therefore support technological development and client testing without requiring participation in a racing championship.

Ferrari

Expanded stories updated on 29 October 2026

Written by HowLongToBuild · Sources are linked with each story · Checked on 23 October 2026. Historical facts and story details refer to the context described.

THE COMMUNITY’S EXPERIENCE

What was it like to build?

Three separate scores from 1 to 10. For difficulty, 1 means very easy and 10 means very difficult.

No approved ratings yet. Scores are never generated by this site or inferred from the recommended age.

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Building tips from the community

Specific steps, useful checks and sticking points. Contributions appear after moderation, in their original language. Do not upload instruction pages or personal contact details.

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SET THE MOOD

A soundtrack for your build

· Selected for the subject and atmosphere

Electronic pulses and open melodies provide movement without a constant action-film crescendo. They accompany landscapes and travelling vehicles through a sense of exploration.

OUR PICK

Dive

Tycho

Rhythmic and lively

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