LEGO Technic Liebherr R 9800 Excavator 42100 Build Kit – 4,108 Pieces

Overview

Experience a colossal LEGO Technic build with the Liebherr R 9800 Excavator, a highly detailed replica designed for serious builders. Developed in partnership with Liebherr, this model blends authentic detailing with advanced app-controlled technology to deliver precise, immersive play.

The set features two Smart Hubs and seven motors to power realistic motions, while the LEGO Technic CONTROL+ app expands play possibilities with four dedicated control screens and striking graphics. This combination lets you drive the machine, rotate the superstructure, extend the boom, and manipulate the bucket with authentic sound effects and real-time feedback.

Four control screens, endless play paths

• Multi-function screen lets you drive in all directions, rotate the superstructure, extend the boom, and raise the bucket, with realistic sounds and live metrics.
• One-touch screen supports drag-pattern control for coordinated movement of the boom, arm, and bucket.
• Custom-built movements screen lets you select presets or record sequences to create complex actions.
• Challenges & achievements screen invites you to complete tasks and unlock reward badges for replay value.

Build, display, and learn

• The 4,108-piece Liebherr R 9800 Excavator replica showcases an authentic color scheme and sticker detailing that elevate display realism.
• Sophisticated gear mechanisms introduce builders to advanced engineering concepts while encouraging problem solving and fine motor precision during assembly and operation.
• Impressive size supports dramatic display and open-ended play when paired with other LEGO sets and bricks.

Why this makes sense for you

This Technic model is built for focused, rewarding sessions and display-worthy results. The CONTROL+ app supports recording sequences, testing control patterns, and pursuing digital challenges, all while keeping expectations flexible. Treat it as a demanding build project, a premium display piece, or a rich platform for creative, non-pressured exploration of robotics-inspired play.