Robotics Invention System Upgrade Kit (1.5) (3803-1) is a RCX LEGO set released in 1999 with 70 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. This set includes 25 unique part types.
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Parts in this set
25 parts · updating…
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Plate 2 x 2 Corner2420 · ×8 · Light Gray -
Plate Special 2 x 2 with 2 Pin Holes2817 · ×2 · Light Gray -
Rubber Band Small 13mm (Square Cross Section)71509 · ×2 · Black -
![Rubber Belt Small [15mm ID] [Round Cross Section]](https://cdn.rebrickable.com/media/parts/elements/4544140.jpg)
Rubber Belt Small [15mm ID] [Round Cross Section]85543 · ×2 · White -
Sticker Sheet for Sets 3803-1,9732-172047 · ×1 · [No Color/Any Color] -
Technic Axle 2 Notched32062 · ×2 · Black -
Technic Axle 43705 · ×4 · Black -
Technic Axle 532073 · ×2 · Black -
Technic Axle 63706 · ×2 · Black -
Technic Axle 83707 · ×1 · Black -
Technic Axle and Pin Connector Angled #2 - 180°32034 · ×2 · Blue -
Technic Axle and Pin Connector Perpendicular6536 · ×8 · Light Gray -
![Technic Axle Connector Ridged [with x Hole x Orientation]](https://cdn.rebrickable.com/media/parts/elements/4113804.jpg)
Technic Axle Connector Ridged [with x Hole x Orientation]6538b · ×2 · Light Gray -
Technic Beam 1 x 3 Thin6632 · ×2 · Light Gray -
Technic Beam 1 x 5 Thin32017 · ×2 · Light Gray -
Technic Beam 1 x 7 Thin32065 · ×4 · Black -
Technic Beam 1 x 9 Bent (6 - 4) Thick6629 · ×2 · Black -
Technic Beam 2 x 4 L-Shape Thick32140 · ×2 · Black -
Technic Beam 3 x 3 L-Shape Thin32056 · ×4 · Light Gray -
Technic Bush 1/2 Smooth with Axle Hole Reduced32123a · ×3 · Light Gray -
Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray Center76019 · ×1 · White -
Technic Modular Connector32137 · ×4 · Trans-Dark Blue -
Technic Pin Double with Axle Hole32138 · ×2 · Yellow -
![Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]](https://cdn.rebrickable.com/media/parts/elements/4107741.jpg)
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]32054 · ×4 · Blue -
![Technic Rubber Belt Medium [26mm ID] [Round Cross Section]](https://cdn.rebrickable.com/media/parts/elements/4544147.jpg)
Technic Rubber Belt Medium [26mm ID] [Round Cross Section]85545 · ×2 · Blue