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LEGO Missing Piece Checker

Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece and leave with the element ID LEGO asks for, or a link to buy the part.

Shadow Crawler

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8104 Shadow Crawler

147 pieces in 65 part and color combinations, plus 2 minifigures.

The piece count includes the 14 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

Before you call it missing

Builders who report a missing piece often find it in one of these places. Tick each one off as you look.

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Piece checklist

Plates 22 pieces

  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 ×1
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 ×9
  • Plate 4 x 4 Dark Bluish Gray Part 3031 Element 4243831 or 4211089 ×1
  • Plate 2 x 6 Green Part 3795 Element 379528 ×2
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×3
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×2

Technic Pins 13 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×5
  • Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Black Part 47455 Element 4272426 or 4213374 ×3
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×1

Bricks Sloped 12 pieces

  • Brick Sloped 2 x 2 No Studs, with 3 Side Pistons Raised Edges Black Part 30603 Element 4163524 ×4
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Dark Bluish Gray Part 3747b Element 4211064 ×4
  • Brick Sloped Inverted 45° 2 x 1 Dark Bluish Gray Part 3665 Element 4211096 ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Lime Part 54200 Element 4504372 or 4298015 ×1

Projectiles / Launchers 11 pieces

  • Projectile, Weapon Disc 2 x 2 with Marbled Yellow Pattern Red Part 53993pat0001 Element 4496199 ×10
  • Launcher 2 x 3 x 4 2/3, Disc Trans-Brown Part 53990 Element 4292137 ×1

Bricks Wedged 10 pieces

  • Brick Wedged, Curved 16 x 4 Triple with Inner Ridges Black Part 45301 Element 4200486 ×3
  • Brick Wedged, Sloped 4 x 2 Triple Left Black Part 43710 Element 6040297 or 4180413 ×1
  • Brick Wedged, Sloped 4 x 2 Triple Right Black Part 43711 Element 6040298 or 4180423 ×1
  • Brick Wedged, Sloped 4 x 4 Pyramid Center Black Part 47757 Element 4566845 or 4213241 ×4
  • Brick Wedged, Sloped 45° 2 x 4 Triple Black Part 47759 Element 6301912 or 6188706 ×1

Technic Bricks 10 pieces

  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×1
  • Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Dark Bluish Gray Part 32064b ×8

Technic Special 10 pieces

  • Technic Brick Special 2 x 2 with Ball Socket and Axle Hole Dark Bluish Gray Part 57910 ×2
  • Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side] Dark Bluish Gray Part 48171 Element 6492115 or 6343337 ×3
  • Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket Dark Bluish Gray Part 48169 Element 6278974 or 4225973 ×3
  • Technic Brick Special 2 x 2 with Solid Ball and Axle Hole Dark Bluish Gray Part 57909a ×2

Technic Axles 9 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×2
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×5

Technic Connectors 8 pieces

  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×3
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×1
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Black Part 32530 Element 4144024 ×2
  • Technic Axle and Pin Connector Angled #4 - 135° Lime Part 32192 Element 6262901 or 6097773 ×2

Bricks 5 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×3
  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×2

Tiles Special 5 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Neon Green Part 2412b Element 4272661 or 4109766 ×5

Bricks Special 4 pieces

  • Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side Dark Bluish Gray Part 30414 Element 4210725 ×2

Plates Round Curved and Dishes 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

Plates Special 4 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Bluish Gray Part 2540 Element 4210660 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Dark Bluish Gray Part 4623 Element 4260885 or 4256447 ×1

Animal / Creature Body Parts 2 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Lime Part 53451 Element 6337299 or 4579250 1 spare in the box ×2

Bars, Ladders and Fences 2 pieces

  • Bar 1 x 12 with 1 x 2 Plate End with Solid Studs and 1 x 1 Round Plate End Trans-Clear Part 42445 Element 6276993 or 4169199 ×2

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Neon Green Part 4589 Element 618849 or 458949 ×2

Hinges, Arms and Turntables 2 pieces

  • Hinge Tile 1 x 4 Locking Dual 1 Fingers on Top [4 Locking Ridges] Black Part 44822 Element 4193108 ×2

Supports, Girders and Cranes 2 pieces

  • Support 1 x 1 x 5 1/3 Spiral Staircase Axle Black Part 40244 Element 4155558 ×2

Tiles 2 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×1
  • Tile 1 x 2 with Engraved Code for Exo-Force Lime Part 3069bpr0073 Element 4501139 ×1

Windscreens and Fuselage 2 pieces

  • Windscreen 6 x 6 x 3 Canopy Half Sphere with Dual 2 Fingers Trans-Neon Green Part 50747 Element 4500929 ×2

Bricks Curved 1 piece

  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Dark Bluish Gray Part 47457 Element 4218696 ×1

Large Buildable Figures 1 piece

  • Large Figure Weapon, Claw, Climbing Claw / Kodan Ball Half (Toa Nuva) Lime Part 44036 Element 4500377 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8104-1 [No Color/Any Color] Part 58513 Element 4500386 ×1

Technic Beams 1 piece

  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×1

Technic Bushes 1 piece

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×1

Tubes and Hoses 1 piece

  • Hose, Ribbed 7mm D. 15L / 12.0cm Pearl Light Gray Part 78c15 Element 4501125 ×1

Minifigures 2 figures

  • Skeleton, Evil Face, Ball Joint Arms Minifigure, checked as a whole figure ×1
  • Devastator with Trans-Neon Green Torso and Red Eyes Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

Ask LEGO

LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for the set number and each piece's element ID, the number printed beside the piece in the parts list at the back of the instructions. This checker lists both.

Request a replacement from LEGO

Buy the piece

Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from older or second-hand sets.

Keep a record

Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.

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