Robotics Invention System Upgrade Kit (1.5)
🏷️ 3803-1•🎨 Mindstorms•📅 1999•🧱 70 parts•Beginner
LEGO RCX 3803-1 Robotics Invention System Upgrade Kit (1.5) focuses on Robotics Invention System Upgrade Kit (1.5) as a buildable character or creature. Recognition comes from pose, face, silhouette and details that carry the subject's personality. That gives the model presence on the shelf.
Parts Inventory
| Part | Qty |
|---|---|
 Plate 2 x 2 Corner 2420 | 8× |
 Plate Special 2 x 2 with 2 Pin Holes 2817 | 2× |
 Technic Beam 1 x 5 Thin 32017 | 2× |
 Technic Axle and Pin Connector Angled #2 - 180° 32034 | 2× |
![Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]](https://cdn.rebrickable.com/media/parts/elements/3205423.jpg) Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] 32054 | 4× |
 Technic Beam 3 x 3 L-Shape Thin 32056 | 4× |
 Technic Axle 2 Notched 32062 | 2× |
 Technic Beam 1 x 7 Thin 32065 | 4× |
 Technic Axle 5 32073 | 2× |
 Technic Bush 1/2 Smooth with Axle Hole Reduced 32123a | 3× |
Showing 10 of 25 parts
🔓 Sign up to see all partsBuild DNA
Parts inventory insights for Robotics Invention System Upgrade Kit (1.5)
70 pieces puts this build -85% against the average Mindstorms set and -64% against the average 1999 release.
Vs average Mindstorms set
Average Mindstorms set: 481 pieces across 33 other sets.
Vs average 1999 set
Average 1999 set: 192 pieces across 144 other sets.
Color profile
Dominant color
Black
Unique parts
2.8 pieces per unique type
Repeat factor
Average pieces per unique type.
Most used part
Plate 2 x 2 Corner
8xResults are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.
This site is not affiliated with or endorsed by the LEGO Group.