Robot Inventor
51515-1 Mindstorms 2020 949 parts 9.7% repair risk Intermediate
The LEGO Mindstorms Robot Inventor 51515-1 set introduces programmable robotics, built from 949 pieces. Builders construct five distinct robots and vehicles, each motorized for diverse actions. At its core, an intelligent Hub features a 5x5 LED screen, a 6-axis gyro, and a speaker, providing dynamic feedback. These creations are programmed using a drag-and-drop coding environment, inspired by Scratch, enabling completion of activities and missions. The system employs motors and sensors, encouraging exploration of engineering principles and computation.
Parts Inventory
| Part | Qty | LEGO price each |
|---|---|---|
 Technic Pin Connector Hub with 2 Perpendicular Axles 10197 | 2× | €0,18 |
![Technic Gear 8 Tooth [Reinforced]](https://cdn.rebrickable.com/media/parts/elements/6012451.jpg) Technic Gear 8 Tooth [Reinforced] 10928 | 2× | €0,15 |
 Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214 | 14× | €0,29 |
 Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478 | 4× | €0,25 |
 Technic Panel Fairing #21 5L Small Smooth, Side B 11946 | 2× | €0,38 |
 Technic Panel Fairing #22 5L Small Smooth, Side A 11947 | 2× | €0,38 |
![Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes]](https://cdn.rebrickable.com/media/parts/elements/6055519.jpg) Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] 14720 | 2× | €0,36 |
 Technic Panel 3 x 11 x 1 15458 | 2× | €1,13 |
 Technic Axle 5 with Stop 15462 | 2× | €0,11 |
![Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]](https://cdn.rebrickable.com/media/parts/elements/6346517.jpg) Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] 18575 | 4× | €0,36 |
![Technic Pin Connector Round 1L [Beam]](https://cdn.rebrickable.com/media/parts/elements/6177114.jpg) Technic Pin Connector Round 1L [Beam] 18654 | 10× | €0,05 |
![Technic Pin Connector Round 1L [Beam]](https://cdn.rebrickable.com/media/parts/elements/6121485.jpg) Technic Pin Connector Round 1L [Beam] 18654 | 6× | €0,05 |
Repairability
Can you fix Robot Inventor if a piece goes missing?
14 of the 145 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 Robot Inventor, including models from 2020 and other sets in the same theme.
Build DNA
Parts inventory insights for Robot Inventor
949 pieces puts this build +109% against the average Mindstorms set and +112% against the average 2020 release.
Vs average Mindstorms set
Average Mindstorms set: 454 pieces across 33 other sets.
Vs average 2020 set
Average 2020 set: 447 pieces across 450 other sets.
Color profile
Dominant color
Dark Bluish Gray
Unique parts
0.4 pieces per unique type
Repeat factor
Average pieces per unique type.
Most used part
Technic Pin with Friction Ridges Lengthwise and Center Slots
175xResults are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.
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