How many pieces does the LEGO Robot Inventor (51515-1) have?

The LEGO Robot Inventor set (51515-1) contains 949 pieces. It was released in 2020 as part of the LEGO Mindstorms theme.

How can I find missing parts for LEGO set 51515-1?

On BrickMissing you can check which parts from the LEGO Robot Inventor (51515-1) you already own. Add your LEGO collection and we'll show exactly which of the 949 pieces you're missing and which you already have.

Can I build the LEGO Robot Inventor with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 949 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Robot Inventor from?

The LEGO Robot Inventor (51515-1) belongs to the LEGO Mindstorms theme. You can browse all Mindstorms sets on BrickMissing to find more sets from this theme.

Robot Inventor

🏷️ 51515-1•🎨 Mindstorms•📅 2020•🧱 949 parts•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

🧱 949 parts

Part	Color	Qty
Technic Pin Connector Hub with 2 Perpendicular Axles 10197	Black	2×
Technic Gear 8 Tooth [Reinforced] 10928	Dark Bluish Gray	2×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214	Dark Bluish Gray	14×
Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478	Black	4×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	White	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	White	2×
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] 14720	Light Bluish Gray	2×
Technic Panel 3 x 11 x 1 15458	White	2×
Technic Axle 5 with Stop 15462	Reddish Brown	2×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] 18575	Tan	4×

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Technic Panel Fairing #22 5L Small Smooth, Side A	11947	White	2×
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes]	14720	Light Bluish Gray	2×
Technic Panel 3 x 11 x 1	15458	White	2×
Technic Axle 5 with Stop	15462	Reddish Brown	2×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]	18575	Tan	4×
Technic Pin Connector Round 1L [Beam]	18654	White	10×
Technic Pin Connector Round 1L [Beam]	18654	Black	6×
Technic Pin Connector Round 1L [Beam]	18654	Red	10×
Technic Turntable Large Type 3 Base	18939	Light Bluish Gray	1×
Technic Driving Ring Connector	18948	White	1×
Technic Pin Connector Hub with 1 Axle	22961	Black	4×
Technic Panel Curved and Bent 6 x 3	24116	White	2×
Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface	24119	White	2×
Technic Axle 3 with Stop	24316	Reddish Brown	12×
Plate Special 2 x 2 with Pin on Bottom	2476a	Light Bluish Gray	2×
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end	25214	Black	8×
Antenna 8H Whip	2569	Black	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots	2780	Black	175×
Tile 1 x 2 with Groove	3069b	Red	2×
Tile 1 x 2 with Groove	3069b	Black	2×
Technic Beam 1 x 11.5 Double Bent Thick	32009	Black	8×
Technic Axle and Pin Connector Angled #1	32013	White	5×
Technic Axle and Pin Connector Angled #6 - 90°	32014	Black	1×
Technic Axle and Pin Connector Angled #5 - 112.5°	32015	White	2×
Technic Axle and Pin Connector Angled #2 - 180°	32034	White	1×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Light Bluish Gray	12×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Red	6×
Technic Axle 2 Notched	32062	Red	10×
Technic Axle 5	32073	Yellow	4×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Light Bluish Gray	10×
Technic Beam 2 x 4 L-Shape Thick	32140	Red	6×
Technic Beam 2 x 4 L-Shape Thick	32140	Black	6×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Black	2×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Light Bluish Gray	6×
Technic Axle and Pin Connector Angled #4 - 135°	32192	White	6×
Technic Gear 12 Tooth Double Bevel	32270	Black	4×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Black	4×
Technic Beam 1 x 15 Thick	32278	Black	5×
Technic Axle and Pin Connector Perpendicular Double	32291	Black	8×
Technic Beam 1 x 5 Thick	32316	Black	7×
Technic Beam 1 x 5 Thick	32316	Red	9×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Black	9×
Technic Ball Joint	32474	Red	2×
Technic Gear 36 Tooth Double Bevel	32498	Black	1×
Technic Beam 1 x 3 Thick	32523	Red	8×
Technic Beam 1 x 3 Thick	32523	Yellow	2×
Technic Beam 1 x 3 Thick	32523	Red	2×
Technic Beam 1 x 3 Thick	32523	Black	2×
Technic Beam 1 x 3 Thick	32523	Light Bluish Gray	2×
Technic Beam 1 x 3 Thick	32523	Black	10×
Technic Beam 1 x 3 Thick	32523	White	2×
Technic Beam 1 x 7 Thick	32524	White	1×
Technic Beam 1 x 7 Thick	32524	Black	11×
Technic Beam 1 x 11 Thick	32525	Black	7×
Technic Beam 3 x 5 L-Shape Thick	32526	Red	6×
Technic Beam 3 x 5 L-Shape Thick	32526	Black	12×
Technic Pin Long without Friction Ridges	32556	Tan	6×
Technic Pin Connector Perpendicular Long	32557	Black	4×
Technic Gear 24 Tooth [New Style with Single Axle Hole]	3648b	Dark Bluish Gray	2×
Technic Pin without Friction Ridges Lengthwise	3673	Light Bluish Gray	18×
Technic Axle 4	3705	Black	4×
Technic Axle 6	3706	Red	2×
Technic Axle 8	3707	Black	2×
Technic Axle 12	3708	Black	2×
Technic Bush	3713	Light Bluish Gray	10×
Sensor, Color, SPIKE	37308	White	1×
Sensor, Distance, SPIKE	37316	White	1×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Tan	6×
Wheel 57 x 14 with 4 Spokes with 2 Holes and Black Integral Tire	39367pat0002	Black	6×
Technic Base Frame 11 x 19	39369	Red	1×
Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside	3961	Vibrant Yellow	1×
Technic Beam Frame 11 x 15	39790	Black	2×
Technic Connector Beam 3 x 3	39793	Red	9×
Technic Beam Frame 7 x 11	39794	Black	2×
Cable, USB, SPIKE / Mindstorms Robot Inventor	39881	White	1×
Technic Beam 1 x 9 Thick	40490	Red	14×
Technic Beam 1 x 13 Thick	41239	White	5×
Ball, Hard Plastic, 51mm (approx. 6 studs diameter)	41250	Red	1×
Tile 1 x 8 with Groove	4162	Black	2×
Technic Axle and Pin Connector Perpendicular Double Split	41678	Black	4×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Red	4×
Technic Axle Connector with Axle Hole [Reinforced]	42135	Black	3×
Technic Pin 1/2	4274	Light Bluish Gray	10×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	60×
Technic Axle 7	44294	Light Bluish Gray	4×
Dish 6 x 6 Inverted (Radar) with Solid Studs	44375b	White	1×
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes]	44874	Light Bluish Gray	4×
Technic Axle 3	4519	Light Bluish Gray	9×
Technic Axle Connector Double Flexible [Rubber]	45590	Black	4×
Projectile, Arrow with Shaft, Hollow Black Rubber End	46537	Light Bluish Gray	2×
Technic Panel Car Mudguard 15 x 2 x 7	46882	White	2×
Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Along Part)	49130	Light Bluish Gray	4×
Wire Clip with Axle Hole	49283	Red	8×
Launcher, Brick Special 2 x 6 Spring Shooter with Light Bluish Gray Top	49743c01	Dark Bluish Gray	2×
Motor, Medium Servo SPIKE	54696	Light Bluish Gray	4×
Projectile, Large Figure Weapon, Zamor Sphere / Ball	54821	Red	1×
Technic Axle 8 with Stop	55013	Dark Bluish Gray	4×
Wheel 18 x 14 with Pin Hole	55889	Black	4×
Wheel 18 x 8 with Fake Bolts and Shallow Spokes and Axle Hole	56903	White	4×
Technic Axle 5.5 with Stop [Rounded Short End]	59426	Dark Bluish Gray	2×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	White	8×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	White	3×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Black	2×
Technic Beam 3 x 3 T-Shape Thick	60484	Red	6×
Technic Axle 9	60485	Yellow	2×
Tyre Offset Tread with Center Band 23 x 7	61254	Black	4×
Technic Pin Connector Round [Slotted]	62462	Black	8×
Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface	62531	White	3×
Technic Axle and Pin Connector Perpendicular Triple	63869	Light Bluish Gray	7×
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick	64179	Black	5×
Technic Panel Fairing # 4 Small Smooth Long, Side B	64391	White	2×
Technic Panel Fairing #6 Long Smooth, Side B	64393	White	3×
Technic Panel Fairing #5 Long Smooth, Side A	64681	White	3×
Technic Panel Fairing # 3 Small Smooth Long, Side A	64683	White	2×
Technic Panel 5 x 11 x 1	64782	White	4×
Technic Pin Double with Axle Hole - Squared Holes	65098	Light Bluish Gray	4×
Technic Axle and Pin Connector Perpendicular	6536	Red	8×
Differential Gear - 28 Tooth with Round Axle Hole	65413	Red	1×
Differential Gear House	65414	Light Bluish Gray	1×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes]	65487	White	18×
Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes)	65489	Light Bluish Gray	12×
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6558	Black	82×
Technic Gear 12 Tooth Bevel	6589	Tan	6×
Tile 1 x 6 with Groove	6636	Black	2×
Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole	66906	Black	4×
Battery Pack, Rechargeable, Mindstorms Robot Inventor	67704	Red	1×
Hub, Programmable, Mindstorms Robot Inventor	67718	Red	1×
Sticker Sheet for Set 51515-1	73229	Unknown	1×
Hose Rigid 3mm D. 8L / 6.4cm	75c08	Light Bluish Gray	2×
Rubber Belt Small [15mm ID] [Round Cross Section]	85543	White	2×
Tile 2 x 4 with Groove	87079	Red	1×
Technic Panel Fairing #1 Small Smooth Short, Side A	87080	White	2×
Technic Axle 4 with Stop	87083	Dark Bluish Gray	6×
Technic Panel Fairing #2 Small Smooth Short, Side B	87086	White	2×
Technic Turntable Large Type 4 Top, 60 Tooth	88738	Black	1×
Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes	98585	Black	6×
Technic Axle and Pin Connector Perpendicular Double 4L	98989	Light Bluish Gray	2×
Technic Axle 4 with Centre Stop	99008	Tan	2×
Technic Turntable Small Top	99009	Light Bluish Gray	2×
Technic Turntable Small Base, 28 Tooth	99010	Black	2×

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.

LEGOMINDSTORMS

Vs average Mindstorms set

+109%+495 parts

This set949

Average set454

Average Mindstorms set: 454 pieces across 33 other sets.

Vs average 2020 set

+112%+502 parts

This set949

Average set447

Average 2020 set: 447 pieces across 450 other sets.

Color profile

12different colors

Dominant color

Black

Black515x

54%

Light Bluish Gray130x

14%

Red119x

13%

White105x

11%

Unique parts

7.4 pieces per unique type

129

Repeat factor

Average pieces per unique type.

Most used part

Technic Pin with Friction Ridges Lengthwise and Center Slots

175x

Results 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.

Build Insights🧩129unique parts🎨12different colors📊79.1avg. parts per color🏆175×Technic Pin with Friction Ridges Lengthwise and Center Slots

🎨 All Mindstorms sets 📅 All sets from 2020

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