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Set 42099 4x4 X-treme Off-Roader
Technic

LEGO® 4x4 X-treme Off-Roader

The 4x4 X-treme Off-Roader is an app-controlled LEGO® Technic model with genuine four-wheel steering and independent suspension. At 958 pieces and with no minifigures, the vehicle's mechanics sit firmly at the centre of the build. A smartphone app controls steering and drive separately once the model is finished.

Set number
42099
Year
2019
Pieces
958
Minifigures
0
Theme
Technic
Different parts
133
What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 133

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.

Description

Engineering over figures

Rather than facades or figures, the Off-Roader puts drivetrain and suspension front and centre: portal axles lift the ground clearance, while independent suspension at all four wheels absorbs uneven terrain. Steering works on both front and rear axles at once, letting the model turn tight corners despite its full-length wheelbase. That combination of genuine Technic functions makes this a vehicle where the mechanics hidden under the bodywork matter at least as much as its outward shape.

Controlled from a phone

Two motors handle drive and steering independently and connect to the LEGO Control+ app on a phone or tablet, with adjustable speed settings and steering angle. Without the app, the model still works as a push-along vehicle with functioning suspension and steering, which makes it worth building even for anyone who just wants to test the mechanics first. That mix of manual and remote-controlled operation sets the Off-Roader apart from simpler, purely manually driven Technic vehicles.

Colours built for function

Black forms the base of the frame and body panels, blue adds bold accents across the wheel arches and bodywork, light bluish grey highlights technical parts such as axles and covers, and red fills in smaller details. The colour choice takes cues from real off-road vehicles and stays functional rather than decorative, keeping the technical assemblies clearly visible, in keeping with the set's engineering-first character. Anyone browsing the parts list on this page will notice how deliberately blue and red are used as signal colours against the mostly grey and black functional parts.

133 parts driving the mechanics

Of the 958 pieces, 133 are unique parts and colours, a fairly concentrated count typical of Technic vehicles, reflecting how many axles, gears and connector pieces repeat throughout the build. The full parts list on this page shows every element by colour, useful for anyone hunting for matching Technic pieces for their own builds or replacing a missing part from a used set. It's worth checking individual axles and connectors here, since many of them reappear across other Technic vehicles in the wider range.

FAQ

How does the app control work?
Two motors control drive and steering separately, operated through a smartphone app with adjustable speed and steering angle.
Does the set include minifigures?
No, the 4x4 X-treme Off-Roader is a pure Technic vehicle with no minifigures.
Does the model work without the app?
Yes, without the app it still works as a push-along vehicle with functioning suspension and steering.

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