The Cat D11 Bulldozer 42131 (2021, 3,854 pieces) is a licensed replica of Caterpillar's biggest dozer, and one of the most function-packed Technic sets ever.
Functions
- Two-speed driving and steering on the tracks.
- Blade lift and tilt.
- Ripper lift.
- Extending ladder and moving engine pistons.
- All controlled through the Control+ app, with challenges and achievements.
The build
The D11 uses a complex internal gearbox that routes four motors to many functions. Follow the instructions' test steps carefully. Once finished, it's a heavy model: lift it from the frame, not the tracks.
D11 vs Liebherr R 9800
The Liebherr R 9800 is taller and more spectacular, while the D11 packs more mechanical cleverness into a compact body. Construction fans often own both.
Buying tips
Check that the hub, motors and battery box are included, and that all functions run smoothly. The yellow panels should be free of stress marks.
Shop the sets in this article
- 42131 Cat D11 Bulldozer — Like New · Imperfect Box · Used
- 42100 Liebherr R 9800 Excavator — Like New
- 42114 6x6 Volvo Articulated Hauler — Like New · Used
Every listing states its actual condition and what is included. See our condition guide.
FAQ
How many pieces are in the LEGO Cat D11?
3,854 pieces.
Can you build the Cat D11 without the app?
You can build it, but its motorised functions are designed to be controlled with the Control+ app.
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