Robotics Invention System Upgrade Kit (1.5)
3803-1 Mindstorms 1999 70 parts 4% repair risk 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 | LEGO price each |
|---|---|---|
 Plate 2 x 2 Corner 2420 | 8× | Check price → View |
 Plate Special 2 x 2 with 2 Pin Holes 2817 | 2× | Check price → View |
 Technic Beam 1 x 5 Thin 32017 | 2× | Check price → View |
 Technic Axle and Pin Connector Angled #2 - 180° 32034 | 2× | €0,11 |
![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× | Check price → View |
 Technic Beam 3 x 3 L-Shape Thin 32056 | 4× | Check price → View |
 Technic Axle 2 Notched 32062 | 2× | €0,07 |
 Technic Beam 1 x 7 Thin 32065 | 4× | €0,28 |
 Technic Axle 5 32073 | 2× | Check price → View |
 Technic Bush 1/2 Smooth with Axle Hole Reduced 32123a | 3× | Check price → View |
 Technic Modular Connector 32137 | 4× | Check price → View |
 Technic Pin Double with Axle Hole 32138 | 2× | Check price → View |
Repairability
Can you fix Robotics Invention System Upgrade Kit (1.5) if a piece goes missing?
1 of the 25 part+color combinations in this set appear in 3 or fewer sets ever made. Lose one of those and a replacement is very hard to find.
Theme average
8.4%
All sets
6.7%
Hardest to replace
More Mindstorms sets
Browse more LEGO Mindstorms sets related to Robotics Invention System Upgrade Kit (1.5), including models from 1999 and other sets in the same theme.
Build 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: 193 pieces across 144 other sets.
Color profile
Dominant color
Light Gray
Unique parts
1.6 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.
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