LEGO 3803
Robotics Invention System Upgrade Kit (1.5)

LEGO 3803 Robotics Invention System Upgrade Kit (1.5) box image
Set number
3803
Theme
RCX
Pieces
70 pcs
Year
1999
Used & parts
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“Robotics Invention System Upgrade Kit (1.5)” is LEGO® “RCX” theme set number 3803. Released in 1999, it has 70 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.

Part breakdown 25 types

Color split (most first)
Light Gray×31
Black×21
Blue×8
Trans-Dark Blue×4
White×3
Yellow×2
[No Color/Any Color]×1
Main parts (most used first)
2420 Plate 2 x 2 Corner
Light Gray · ×8
6536 Technic Axle and Pin Connector Perpendicular
Light Gray · ×8
32054 Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
Blue · ×4
32056 Technic Beam 3 x 3 L-Shape Thin
Light Gray · ×4
32065 Technic Beam 1 x 7 Thin
Black · ×4
32137 Technic Modular Connector
Trans-Dark Blue · ×4
3705 Technic Axle 4
Black · ×4
32123a Technic Bush 1/2 Smooth with Axle Hole Reduced
Light Gray · ×3
2817 Plate Special 2 x 2 with 2 Pin Holes
Light Gray · ×2
32017 Technic Beam 1 x 5 Thin
Light Gray · ×2
32034 Technic Axle and Pin Connector Angled #2 - 180°
Blue · ×2
32062 Technic Axle 2 Notched
Black · ×2
32073 Technic Axle 5
Black · ×2
32138 Technic Pin Double with Axle Hole
Yellow · ×2
32140 Technic Beam 2 x 4 L-Shape Thick
Black · ×2
3706 Technic Axle 6
Black · ×2
6538b Technic Axle Connector Ridged [with x Hole x Orientation]
Light Gray · ×2
6629 Technic Beam 1 x 9 Bent (6 - 4) Thick
Black · ×2
6632 Technic Beam 1 x 3 Thin
Light Gray · ×2
71509 Rubber Band Small 13mm (Square Cross Section)
Black · ×2
85543 Rubber Belt Small [15mm ID] [Round Cross Section]
White · ×2
85545 Technic Rubber Belt Medium [26mm ID] [Round Cross Section]
Blue · ×2
3707 Technic Axle 8
Black · ×1
72047 Sticker Sheet for Sets 3803-1,9732-1
[No Color/Any Color] · ×1

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