Robotics Invention System Upgrade Kit (1.5)
3803-1 Mindstorms 1999 70 parts 4% catalog rarity Beginner
Robotics Invention System Upgrade Kit (1.5) (3803-1) is a LEGO set with a listed count of 70 parts. Available inventory data is shown below.
Parts Inventory
Showing the first 12 rows of the parts list (70 pieces in total). The full list loads automatically.
| Part | Qty | LEGO price each |
|---|---|---|
| 8× | Check price → View | |
| 2× | Check price → View | |
| 2× | Check price → View | |
| 2× | €0,11 | |
| 4× | Check price → View | |
| 4× | Check price → View | |
| 2× | €0,07 | |
| 4× | €0,28 | |
| 2× | Check price → View | |
| 3× | Check price → View | |
| 4× | Check price → View | |
| 2× | Check price → View |
Catalog rarity
How common are the parts in Robotics Invention System Upgrade Kit (1.5)?
1 of 25 recorded part+color combinations appear in 3 or fewer sets in our catalog. This does not measure replacement availability or price.
Theme average
8.4%
All sets
6.7%
Least common in our catalog
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
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.
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