3803-1
Robotics Invention System Upgrade Kit (1.5)
Building instructions
The building instructions are on the official LEGO website. We do not host any instructions ourselves; the link below takes you to the official page.
View building instructions on LEGO.com (opens an external website)This set on Rebrickable (opens an external website)
Parts list – 3803-1 Robotics Invention System Upgrade Kit (1.5)
25 lines, 70 pieces
| Image | Part | Name | Colour | Quantity | Note |
|---|---|---|---|---|---|
 | 2420 | Plate 2 x 2 CornerPlates | Light Gray | 8× | |
 | 2817 | Plate Special 2 x 2 with 2 Pin HolesPlates Special | Light Gray | 2× | |
![Part 72047 Sticker Sheet for Sets 3803-1, 9732-1 in [No Color/Any Color]](https://cdn.rebrickable.com/media/parts/photos/9999/72047-9999-667604d4-7d24-47b1-9c24-298aa1ef025a.jpg) | 72047 | Sticker Sheet for Sets 3803-1, 9732-1Stickers | [No Color/Any Color] | 1× | |
 | 71509 | Rubber Band Small 13mm (Square Cross Section)String, Bands and Reels | Black | 2× | |
![Part 85543 Rubber Belt Small [15mm ID] [Round Cross Section] in White](https://cdn.rebrickable.com/media/parts/elements/4544140.jpg) | 85543 | Rubber Belt Small [15mm ID] [Round Cross Section]String, Bands and Reels | White | 2× | |
![Part 85545 Technic Rubber Belt Medium [26mm ID] [Round Cross Section] in Blue](https://cdn.rebrickable.com/media/parts/elements/4544147.jpg) | 85545 | Technic Rubber Belt Medium [26mm ID] [Round Cross Section]String, Bands and Reels | Blue | 2× | |
 | 32062 | Technic Axle 2 NotchedTechnic Axles | Black | 2× | |
 | 3705 | Technic Axle 4Technic Axles | Black | 4× | |
 | 32073 | Technic Axle 5Technic Axles | Black | 2× | |
 | 3706 | Technic Axle 6Technic Axles | Black | 2× | |
 | 3707 | Technic Axle 8Technic Axles | Black | 1× | |
 | 6632 | Technic Beam 1 x 3 ThinTechnic Beams | Light Gray | 2× | |
 | 32017 | Technic Beam 1 x 5 ThinTechnic Beams | Light Gray | 2× | |
 | 32065 | Technic Beam 1 x 7 ThinTechnic Beams | Black | 4× | |
 | 6629 | Technic Beam 1 x 9 Bent (6 - 4) ThickTechnic Beams | Black | 2× | |
 | 32140 | Technic Beam 2 x 4 L-Shape ThickTechnic Beams | Black | 2× | |
 | 32056 | Technic Beam 3 x 3 L-Shape ThinTechnic Beams | Light Gray | 4× | |
 | 32123a | Technic Bush 1/2 Smooth with Axle Hole ReducedTechnic Bushes | Light Gray | 3× | |
![Part 6538b Technic Axle Connector Ridged [with x Hole x Orientation] in Light Gray](https://cdn.rebrickable.com/media/parts/elements/4113804.jpg) | 6538b | Technic Axle Connector Ridged [with x Hole x Orientation]Technic Connectors | Light Gray | 2× | |
 | 32034 | Technic Axle and Pin Connector Angled #2 - 180°Technic Connectors | Blue | 2× | |
 | 6536 | Technic Axle and Pin Connector PerpendicularTechnic Connectors | Light Gray | 8× | |
 | 32137 | Technic Modular ConnectorTechnic Connectors | Trans-Dark Blue | 4× | |
 | 76019 | Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray CenterTechnic Gears | White | 1× | |
 | 32138 | Technic Pin Double with Axle HoleTechnic Pins | Yellow | 2× | |
![Part 32054 Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] in Blue](https://cdn.rebrickable.com/media/parts/elements/4107741.jpg) | 32054 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]Technic Pins | Blue | 4× |