Robobots (4099-1) is a Designer Sets LEGO set released in 2003 with 326 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Designer Sets sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 146 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
2003 (23 years ago — may be retired)
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Catalog scale
326 parts listed · 146 inventory lines tracked
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Minifigures
No minifigs in inventory (brick-only or Technic set)
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Build manual
Digital booklet available on this page — use it to verify bag contents
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~547 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
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Building instructions
Official LEGO instructions — read on BrickID
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Parts in this set
146 parts · page 1 of 4 · updating…
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Antenna 1 x 4 with Rounded Top3957a · ×2 · Chrome Silver -
![Bracket 1 x 2 - 1 x 4 [Square Corners]](https://cdn.rebrickable.com/media/parts/elements/4189120.jpg)
Bracket 1 x 2 - 1 x 4 [Square Corners]2436 · ×4 · Blue -
Brick 1 x 13005 · ×2 · Medium Blue -
Brick 1 x 43010 · ×2 · Medium Blue -
Brick 2 x 23003 · ×2 · Blue -
Brick 2 x 2 Corner2357 · ×2 · Blue -
Brick Curved 1 x 2 x 1 1/3 with Curved Top6091 · ×4 · Blue -
Brick Curved 1 x 2 x 1 1/3 with Curved Top6091 · ×2 · Medium Blue -
Brick Curved 2 x 2 with Lip, No Studs30602 · ×1 · Orange -
Brick Curved 2 x 2 x 2/3 Two Studs and Lip End41855 · ×6 · Medium Blue -
Brick Curved 2 x 36215 · ×2 · Blue -
Brick Round 1 x 1 Open Stud3062b · ×2 · Black -
Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder30367b · ×1 · Light Gray -
Brick Sloped 33° 3 x 14286 · ×4 · Blue -
Brick Sloped 33° 3 x 23298 · ×3 · Medium Blue -
Brick Sloped 45° 2 x 1 Double / Inverted with Hollow Bottom3049c · ×2 · Dark Gray -
Brick Sloped 45° 2 x 1 with Bottom Pin3040b · ×4 · Dark Gray -
Brick Sloped 45° 2 x 23039 · ×4 · Blue -
Brick Sloped 45° 2 x 23039 · ×1 · Trans-Clear -
Brick Sloped 45° 3 x 4 Double / 33°4861 · ×2 · Dark Gray -
Brick Sloped 45° 3 x 4 Double / 33°4861 · ×1 · Blue -
Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube3678a · ×1 · Blue -
![Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]](https://cdn.rebrickable.com/media/parts/elements/366023.jpg)
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]3660 · ×3 · Blue -
Brick Sloped Inverted 45° 2 x 2 Double Convex3676 · ×2 · Dark Gray -
Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed4871 · ×1 · Blue -
Brick Special 1 x 1 with 3 Speakers / Loudspeakers / Space Positioning Rockets3963 · ×2 · Dark Gray -
Brick Special 1 x 1 with Headlight4070 · ×4 · Blue -
Brick Special 1 x 4 with 4 Studs on One Side30414 · ×3 · Dark Gray -
Brick Special 2 x 4, with 2 x 2 Brick with Top Pin and 1 x 2 Side Plates30592 · ×1 · Light Gray -
Brick Wedged, Angled 3 x 2 Left6565 · ×1 · Medium Blue -
Brick Wedged, Angled 3 x 2 Right6564 · ×1 · Medium Blue -
Brick Wedged, Sloped 4 x 2 Triple Left43710 · ×2 · Blue -
Brick Wedged, Sloped 4 x 2 Triple Right43711 · ×2 · Blue -
Brick Wedged, Sloped 4 x 4 Triple, No Stud Notches6069 · ×2 · Dark Gray -
Brick Wedged, Sloped 45° 4 x 2 Left43721 · ×2 · Dark Gray -
Brick Wedged, Sloped 45° 4 x 2 Right43720 · ×2 · Dark Gray -
![Brick Wedged, Sloped Inverted 4 x 4 Triple [2 Connections between Front Studs]](https://cdn.rebrickable.com/media/parts/elements/4187769.jpg)
Brick Wedged, Sloped Inverted 4 x 4 Triple [2 Connections between Front Studs]4855 · ×1 · Dark Gray -
![Cone 1 x 1 [No Top Groove]](https://cdn.rebrickable.com/media/parts/elements/4125260.jpg)
Cone 1 x 1 [No Top Groove]4589 · ×2 · Dark Gray -
![Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°]](https://cdn.rebrickable.com/media/parts/elements/4189129.jpg)
Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°]4285b · ×1 · Black -
![Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]](https://cdn.rebrickable.com/media/parts/elements/347526.jpg)
Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]3475b · ×2 · Black -
![Equipment Camera with Side Sight [aka Space Gun]](https://cdn.rebrickable.com/media/parts/elements/436026.jpg)
Equipment Camera with Side Sight [aka Space Gun]4360 · ×1 · Black -
Hinge Brick 1 x 2 Base3937 · ×2 · Black -
Hinge Brick 1 x 2 Locking with 1 Finger Vertical End and 2 Fingers Vertical End, 9 Teeth30386 · ×4 · Light Gray -
Hinge Brick 1 x 2 Locking with 2 Fingers Horizontal End, 9 Teeth30540 · ×2 · Black -
Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth30365 · ×2 · Dark Gray -
Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth30365 · ×4 · Blue -
Hinge Brick 1 x 2 Top Plate Thin3938 · ×2 · Blue -
Hinge Brick 1 x 4 Locking with 1 Finger Vertical End and 2 Fingers Vertical End, 9 Teeth30387 · ×4 · Light Gray