# LEGO 51515-1 — Robot Inventor (2020)

Source: https://www.brickmissing.com/sets/51515-1-robot-inventor
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

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.

## Set facts

- Set number: 51515-1
- Name: Robot Inventor
- Theme: Mindstorms › Robot Inventor
- Released: 2020
- Pieces: 949
- Distinct part + colour lots: 145
- Build difficulty: intermediate
- Repairability: 9.7% of this set's lots are hard to replace (14 of 145 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (145 lots, 949 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 2 | Technic Pin Connector Hub with 2 Perpendicular Axles | Black | 10197 | 6099801 | €0,18 |
| 2 | Technic Gear 8 Tooth [Reinforced] | Dark Bluish Gray | 10928 | 6012451 | €0,15 |
| 14 | Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle | Dark Bluish Gray | 11214 | 6015356 | €0,29 |
| 4 | Technic Beam 1 x 5 Thin with Axle Holes on Ends | Black | 11478 | 6327028 | €0,25 |
| 2 | Technic Panel Fairing #21 5L Small Smooth, Side B | White | 11946 | 6330084 | €0,38 |
| 2 | Technic Panel Fairing #22 5L Small Smooth, Side A | White | 11947 | 6343987 | €0,38 |
| 2 | Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] | Light Bluish Gray | 14720 | 6055519 | €0,36 |
| 2 | Technic Panel 3 x 11 x 1 | White | 15458 | 6055627 | €1,13 |
| 2 | Technic Axle 5 with Stop | Reddish Brown | 15462 | 6159763 | €0,11 |
| 4 | Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] | Tan | 18575 | 6346517 | €0,36 |
| 10 | Technic Pin Connector Round 1L [Beam] | White | 18654 | 6177114 | €0,05 |
| 6 | Technic Pin Connector Round 1L [Beam] | Black | 18654 | 6121485 | €0,05 |
| 10 | Technic Pin Connector Round 1L [Beam] | Red | 18654 | 6295149 | €0,05 |
| 1 | Technic Turntable Large Type 3 Base | Light Bluish Gray | 18939 | 6109285 | €1,04 |
| 1 | Technic Driving Ring Connector | White | 18948 | 6276052 | €0,23 |
| 4 | Technic Pin Connector Hub with 1 Axle | Black | 22961 | 6253260 | €0,13 |
| 2 | Technic Panel Curved and Bent 6 x 3 | White | 24116 | 6133244 | — |
| 2 | Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface | White | 24119 | 6246996 | €0,63 |
| 12 | Technic Axle 3 with Stop | Reddish Brown | 24316 | 6135494 | €0,07 |
| 2 | Plate Special 2 x 2 with Pin on Bottom | Light Bluish Gray | 2476a | 6276848 | €0,16 |
| 8 | Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end | Black | 25214 | 6179182 | €0,23 |
| 2 | Antenna 8H Whip | Black | 2569 | 6265148 | €0,33 |
| 175 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 2 | Tile 1 x 2 with Groove | Red | 3069b | 6213779 | €0,07 |
| 2 | Tile 1 x 2 with Groove | Black | 3069b | 306926 | €0,07 |
| 8 | Technic Beam 1 x 11.5 Double Bent Thick | Black | 32009 | 6271152 | €0,39 |
| 5 | Technic Axle and Pin Connector Angled #1 | White | 32013 | 6332573 | €0,08 |
| 1 | Technic Axle and Pin Connector Angled #6 - 90° | Black | 32014 | 6268905 | €0,22 |
| 2 | Technic Axle and Pin Connector Angled #5 - 112.5° | White | 32015 | 6271349 | €0,21 |
| 1 | Technic Axle and Pin Connector Angled #2 - 180° | White | 32034 | 6271870 | €0,11 |
| 12 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Light Bluish Gray | 32054 | 4211865 | — |
| 6 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Red | 32054 | 4125198 | — |
| 10 | Technic Axle 2 Notched | Red | 32062 | 4142865 | €0,07 |
| 4 | Technic Axle 5 | Yellow | 32073 | 6130008 | €0,11 |
| 10 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Light Bluish Gray | 32123b | 6271165 | €0,04 |
| 6 | Technic Beam 2 x 4 L-Shape Thick | Red | 32140 | 6509369 | €0,15 |
| 6 | Technic Beam 2 x 4 L-Shape Thick | Black | 32140 | 6271825 | €0,15 |
| 2 | Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole | Black | 32184 | 6276951 | €0,12 |
| 6 | Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole | Light Bluish Gray | 32184 | 6276969 | €0,12 |
| 6 | Technic Axle and Pin Connector Angled #4 - 135° | White | 32192 | 6262904 | €0,19 |
| 4 | Technic Gear 12 Tooth Double Bevel | Black | 32270 | 4177431 | €0,18 |
| 4 | Technic Beam 1 x 9 Bent (7 - 3) Thick | Black | 32271 | 6276835 | €0,33 |
| 5 | Technic Beam 1 x 15 Thick | Black | 32278 | 4542573 | €0,42 |
| 8 | Technic Axle and Pin Connector Perpendicular Double | Black | 32291 | 6280394 | €0,15 |
| 7 | Technic Beam 1 x 5 Thick | Black | 32316 | 4142135 | €0,19 |
| 9 | Technic Beam 1 x 5 Thick | Red | 32316 | 6533555 | €0,19 |
| 9 | Technic Beam 1 x 7 Bent (4 - 4) Thick | Black | 32348 | 6278125 | €0,27 |
| 2 | Technic Ball Joint | Red | 32474 | 6295155 | €0,12 |
| 1 | Technic Gear 36 Tooth Double Bevel | Black | 32498 | 4255563 | €0,90 |
| 8 | Technic Beam 1 x 3 Thick | Red | 32523 | 4144020 | — |
| 2 | Technic Beam 1 x 3 Thick | Yellow | 32523 | 4153707 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Red | 32523 | 4153718 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Black | 32523 | 4509376 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Light Bluish Gray | 32523 | 6007973 | €0,10 |
| 10 | Technic Beam 1 x 3 Thick | Black | 32523 | 4142822 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | White | 32523 | 4208160 | €0,10 |
| 1 | Technic Beam 1 x 7 Thick | White | 32524 | 4495927 | €0,25 |
| 11 | Technic Beam 1 x 7 Thick | Black | 32524 | 4495935 | €0,25 |
| 7 | Technic Beam 1 x 11 Thick | Black | 32525 | 6029578 | €0,33 |
| 6 | Technic Beam 3 x 5 L-Shape Thick | Red | 32526 | 6295146 | — |
| 12 | Technic Beam 3 x 5 L-Shape Thick | Black | 32526 | 4142823 | €0,24 |
| 6 | Technic Pin Long without Friction Ridges | Tan | 32556 | — | — |
| 4 | Technic Pin Connector Perpendicular Long | Black | 32557 | 4143466 | €0,22 |
| 2 | Technic Gear 24 Tooth [New Style with Single Axle Hole] | Dark Bluish Gray | 3648b | 6133119 | €0,33 |
| 18 | Technic Pin without Friction Ridges Lengthwise | Light Bluish Gray | 3673 | 4211807 | €0,05 |
| 4 | Technic Axle 4 | Black | 3705 | 370526 | €0,08 |
| 2 | Technic Axle 6 | Red | 3706 | 6130002 | €0,12 |
| 2 | Technic Axle 8 | Black | 3707 | 370726 | €0,22 |
| 2 | Technic Axle 12 | Black | 3708 | 370826 | €0,27 |
| 10 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 1 | Sensor, Color, SPIKE | White | 37308 | 6217705 | — |
| 1 | Sensor, Distance, SPIKE | White | 37316 | 6217717 | — |
| 6 | Technic Axle Pin without Friction Ridges Lengthwise | Tan | 3749 | 4666579 | €0,06 |
| 6 | Wheel 57 x 14 with 4 Spokes with 2 Holes and Black Integral Tire | Black | 39367pat0002 | 6287602 | — |
| 1 | Technic Base Frame 11 x 19 | Red | 39369 | 6252639 | — |
| 1 | Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside | Vibrant Yellow | 3961 | 6544546 | €1,03 |
| 2 | Technic Beam Frame 11 x 15 | Black | 39790 | 6295161 | — |
| 9 | Technic Connector Beam 3 x 3 | Red | 39793 | 6252655 | — |
| 2 | Technic Beam Frame 7 x 11 | Black | 39794 | 6265643 | €1,59 |
| 1 | Cable, USB, SPIKE / Mindstorms Robot Inventor | White | 39881 | 6277572 | — |
| 14 | Technic Beam 1 x 9 Thick | Red | 40490 | 6314820 | — |
| 5 | Technic Beam 1 x 13 Thick | White | 41239 | 4620671 | €0,39 |
| 1 | Ball, Hard Plastic, 51mm (approx. 6 studs diameter) | Red | 41250 | 4156530 | — |
| 2 | Tile 1 x 8 with Groove | Black | 4162 | 416226 | €0,15 |
| 4 | Technic Axle and Pin Connector Perpendicular Double Split | Black | 41678 | 4162857 | — |
| 4 | Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Red | 42003 | 6295182 | — |
| 3 | Technic Axle Connector with Axle Hole [Reinforced] | Black | 42135 | 6331716 | €0,27 |
| 10 | Technic Pin 1/2 | Light Bluish Gray | 4274 | 4211483 | €0,05 |
| 60 | Technic Axle Pin with Friction Ridges Lengthwise | Black | 43093 | 4206482 | €0,06 |
| 4 | Technic Axle 7 | Light Bluish Gray | 44294 | 4211805 | €0,16 |
| 1 | Dish 6 x 6 Inverted (Radar) with Solid Studs | White | 44375b | 4514791 | — |
| 4 | Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] | Light Bluish Gray | 44874 | 6321303 | €0,18 |
| 9 | Technic Axle 3 | Light Bluish Gray | 4519 | 4211815 | €0,05 |
| 4 | Technic Axle Connector Double Flexible [Rubber] | Black | 45590 | 4198367 | €0,17 |
| 2 | Projectile, Arrow with Shaft, Hollow Black Rubber End | Light Bluish Gray | 46537 | 6307940 | €2,08 |
| 2 | Technic Panel Car Mudguard 15 x 2 x 7 | White | 46882 | 6295159 | — |
| 4 | Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Along Part) | Light Bluish Gray | 49130 | 6313453 | €0,35 |
| 8 | Wire Clip with Axle Hole | Red | 49283 | 6295401 | — |
| 2 | Launcher, Brick Special 2 x 6 Spring Shooter with Light Bluish Gray Top | Dark Bluish Gray | 49743c01 | 6296378 | €1,83 |
| 4 | Motor, Medium Servo SPIKE | Light Bluish Gray | 54696 | 6299646 | — |
| 1 | Projectile, Large Figure Weapon, Zamor Sphere / Ball | Red | 54821 | 4545430 | — |
| 4 | Technic Axle 8 with Stop | Dark Bluish Gray | 55013 | 4499858 | €0,21 |
| 4 | Wheel 18 x 14 with Pin Hole | Black | 55889 | 6273330 | €0,18 |
| 4 | Wheel 18 x 8 with Fake Bolts and Shallow Spokes and Axle Hole | White | 56903 | 6013484 | €0,33 |
| 2 | Technic Axle 5.5 with Stop [Rounded Short End] | Dark Bluish Gray | 59426 | 4508553 | €0,11 |
| 8 | Technic Axle Connector Smooth [with x Hole + Orientation] | White | 59443 | 6212049 | €0,06 |
| 3 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | White | 60483 | 6265135 | €0,07 |
| 2 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | Black | 60483 | 6265091 | €0,07 |
| 6 | Technic Beam 3 x 3 T-Shape Thick | Red | 60484 | 6295232 | — |
| 2 | Technic Axle 9 | Yellow | 60485 | 6130010 | €0,21 |
| 4 | Tyre Offset Tread with Center Band 23 x 7 | Black | 61254 | 4541455 | €0,24 |
| 8 | Technic Pin Connector Round [Slotted] | Black | 62462 | 6173119 | €0,06 |
| 3 | Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface | White | 62531 | 6004137 | — |
| 7 | Technic Axle and Pin Connector Perpendicular Triple | Light Bluish Gray | 63869 | 6331441 | €0,17 |
| 5 | Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick | Black | 64179 | 6016154 | €0,91 |
| 2 | Technic Panel Fairing # 4 Small Smooth Long, Side B | White | 64391 | 4547582 | €0,58 |
| 3 | Technic Panel Fairing #6 Long Smooth, Side B | White | 64393 | 4558797 | €0,74 |
| 3 | Technic Panel Fairing #5 Long Smooth, Side A | White | 64681 | 4558802 | €0,74 |
| 2 | Technic Panel Fairing # 3 Small Smooth Long, Side A | White | 64683 | 4547581 | €0,58 |
| 4 | Technic Panel 5 x 11 x 1 | White | 64782 | 4580019 | — |
| 4 | Technic Pin Double with Axle Hole - Squared Holes | Light Bluish Gray | 65098 | 6315900 | €0,28 |
| 8 | Technic Axle and Pin Connector Perpendicular | Red | 6536 | 4140348 | — |
| 1 | Differential Gear - 28 Tooth with Round Axle Hole | Red | 65413 | 6285646 | — |
| 1 | Differential Gear House | Light Bluish Gray | 65414 | 6285647 | €0,91 |
| 18 | Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes] | White | 65487 | 6282148 | €0,11 |
| 12 | Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) | Light Bluish Gray | 65489 | 6282158 | €0,22 |
| 82 | Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots | Black | 6558 | 4514553 | — |
| 6 | Technic Gear 12 Tooth Bevel | Tan | 6589 | 4565452 | €0,10 |
| 2 | Tile 1 x 6 with Groove | Black | 6636 | 663626 | €0,13 |
| 4 | Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole | Black | 66906 | 6344752 | €0,11 |
| 1 | Battery Pack, Rechargeable, Mindstorms Robot Inventor | Red | 67704 | 6299315 | — |
| 1 | Hub, Programmable, Mindstorms Robot Inventor | Red | 67718 | 6299573 | — |
| 1 | Sticker Sheet for Set 51515-1 | Unknown | 73229 | 6327015 | — |
| 2 | Hose Rigid 3mm D. 8L / 6.4cm | Light Bluish Gray | 75c08 | 4514192 | — |
| 2 | Rubber Belt Small [15mm ID] [Round Cross Section] | White | 85543 | 4544140 | €2,84 |
| 1 | Tile 2 x 4 with Groove | Red | 87079 | 6223065 | €0,16 |
| 2 | Technic Panel Fairing #1 Small Smooth Short, Side A | White | 87080 | 4558878 | €0,48 |
| 6 | Technic Axle 4 with Stop | Dark Bluish Gray | 87083 | 6083620 | €0,07 |
| 2 | Technic Panel Fairing #2 Small Smooth Short, Side B | White | 87086 | 4558874 | €0,48 |
| 1 | Technic Turntable Large Type 4 Top, 60 Tooth | Black | 88738 | 6413529 | €1,06 |
| 6 | Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes | Black | 98585 | 6186133 | €0,33 |
| 2 | Technic Axle and Pin Connector Perpendicular Double 4L | Light Bluish Gray | 98989 | 6308440 | €0,56 |
| 2 | Technic Axle 4 with Centre Stop | Tan | 99008 | 4666999 | €0,10 |
| 2 | Technic Turntable Small Top | Light Bluish Gray | 99009 | 4652235 | €0,44 |
| 2 | Technic Turntable Small Base, 28 Tooth | Black | 99010 | 6326620 | €0,65 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/51515-1-robot-inventor
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/51515-1-robot-inventor