The Liebherr R 9800 Excavator 42100 (2019) was a turning point for LEGO Technic: it was the first big set designed around the Control+ app. With 4,108 pieces and seven motors split across two smart hubs, it moves like a real mining excavator.
What it can do
- Drive forwards, backwards and turn on its tracks.
- Rotate the superstructure 360°.
- Raise and lower the boom, move the stick and tilt the bucket.
- Control everything from a smartphone, including a "one-touch" mode and a joystick mode.
Building it
The build is long (often 15+ hours) and repetitive in places, especially the tracks. Test each motor as you go, using the app, before closing the sections. Keep the two hubs charged with fresh batteries during testing.
Is it still worth it?
Yes. Even after newer sets like the Cat D11 Bulldozer 42131, the R 9800 remains one of the most impressive motorised Technic models. It is retired, so pre-owned copies are the way to get one.
What to check when buying used
Ask whether all seven motors and both hubs are included and working, and whether the track links are complete. Our listings state exactly what's included.
Shop the sets in this article
- 42100 Liebherr R 9800 Excavator — Like New
- 42131 Cat D11 Bulldozer — Like New · Imperfect Box · Used
- 8043 Motorized Excavator — Like New · Used
Every listing states its actual condition and what is included. See our condition guide.
FAQ
How many motors does LEGO 42100 have?
Seven motors, controlled by two Control+ smart hubs.
Does the Liebherr R 9800 need an app?
Yes, it's designed for the LEGO Technic Control+ app on a smartphone or tablet.
LEGO®, the LEGO logo and Technic are trademarks of the LEGO Group. Star Wars is a trademark of Lucasfilm Ltd. REBLOXE is an independent reseller of pre-owned and refurbished sets and is not affiliated with, sponsored or endorsed by the LEGO Group or Lucasfilm. Piece counts and release years are given for information and may differ slightly between sources.