Is the Cat D11 Bulldozer motorised?

Yes, it's a functional Technic model with moving elements such as the blade and ripper.

How many pieces does the set have?

Set 42131 contains 3,854 pieces across 231 unique parts.

Does the set include any minifigures?

No, the Cat D11 Bulldozer is a pure function model with no minifigures.

Technic

Cat D11 Bulldozer

The Cat D11 Bulldozer is one of the largest motorised Technic sets at 3,854 pieces, recreating the real Caterpillar bulldozer. 231 unique parts cover the drivetrain, tracks and moving functions. This page lists every part used, along with the colours and other facts about the set.

Set number: 42131
Year: 2021
Pieces: 3,854
Minifigures: 0
Theme: Technic
Different parts: 231

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 231

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

A motorised, functional model

Unlike many other large LEGO sets, the Cat D11 Bulldozer isn't a static display piece but a working vehicle with motors and moving elements such as the blade and ripper. With 231 unique parts across 3,854 pieces overall, a good share of that variety goes into the drivetrain and controls rather than just the outer bodywork, which mirrors the real machine's proportions and detailing. That mix of mechanics and bodywork is typical of the Technic line and sets it clearly apart from purely decorative models. The parts list shows which parts go into the drivetrain, tracks and other moving functions, and how many of them are purely mechanical.

Black, yellow and blue for a construction-site look

Black, yellow, blue and light bluish grey make up the palette, matching the familiar look of large construction machinery. Yellow, the classic warning colour for site vehicles, dominates the bodywork, while black and light bluish grey cover the undercarriage, tracks and technical parts. Blue adds smaller accents around the cab and detailing. The parts list shows how these four colours are distributed across the 231 unique parts and where each colour dominates the model.

No minifigures in this model

Like most large Technic sets, the Cat D11 Bulldozer comes without minifigures; the focus sits entirely on the mechanics and an accurate recreation of the machine. The cab and detailing are present but aren't designed to accommodate figures. That focus lets all 3,854 pieces go towards function and accuracy rather than play figures.

Who this set is for

The Cat D11 Bulldozer appeals to Technic fans interested in working mechanics rather than looks alone, as well as construction-vehicle and heavy-equipment enthusiasts. Anyone who has already built a smaller motorised Technic set will find this a considerably bigger project with a correspondingly longer build time. The parts list on this page is worth checking beforehand to get a sense of the 231 different parts and their role in the model.

FAQ

Is the Cat D11 Bulldozer motorised?: Yes, it's a functional Technic model with moving elements such as the blade and ripper.
How many pieces does the set have?: Set 42131 contains 3,854 pieces across 231 unique parts.
Does the set include any minifigures?: No, the Cat D11 Bulldozer is a pure function model with no minifigures.