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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.

Coral Reef Diorama

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40783 Coral Reef Diorama

260 pieces in 75 part and color combinations.

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

Dark Tan 26 pieces

  • Brick Sloped 65° 2 x 2 x 2 with Bottom Tube Dark Tan Part 3678b Element 4616593 ×6
  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud Dark Tan Part 4460b Element 4653509 ×9
  • Plant, Pumpkin Dark Tan Part 51270 Element 6357809 ×1
  • Plate 2 x 3 Dark Tan Part 3021 Element 6035540 or 6015192 ×1
  • Plate Round 1 x 1 with Open Stud Dark Tan Part 85861 Element 6300322 1 spare in the box ×9

Light Bluish Gray 23 pieces

  • Brick 1 x 2 x 3 with Bottom Stud Holder Light Bluish Gray Part 22886 Element 6170387 ×1
  • Brick 2 x 4 Light Bluish Gray Part 3001 Element 4211385 ×1
  • Brick Arch 1 x 3 x 2 Light Bluish Gray Part 88292 Element 6230234 or 6058938 ×2
  • Brick Wedged, Sloped 45° 2 x 2 Corner Light Bluish Gray Part 13548 Element 6034676 ×11
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×3
  • Plate 6 x 6 Light Bluish Gray Part 3958 Element 4211474 ×1
  • Plate Special 1 x 1 x 2/3 Half Round with Side Stud Light Bluish Gray Part 3386 Element 6448793 ×1
  • Plate Special 1 x 2 Rounded with 2 Open Studs Light Bluish Gray Part 35480 Element 6248890 ×3

Olive Green 20 pieces

  • Plant, with Bar and Off-shoot with Stud Olive Green Part 1566 Element 6426470 ×6
  • Plate 1 x 2 Olive Green Part 3023 Element 6016483 ×10
  • Wedge Plate 2 x 2 Cut Corner Olive Green Part 26601 Element 6278087 ×4

Green 16 pieces

  • Headwear Accessory Antlers Green Part 1613 Element 6440443 1 spare in the box ×2
  • Plate Round 1 x 1 with Open Stud Green Part 85861 Element 6338221 1 spare in the box ×9
  • Weapon Spike Flexible 3.5L Green Part 64727 Element 6270084 or 4616845 ×5

Dark Bluish Gray 15 pieces

  • Brick Arch 1 x 3 x 2 Dark Bluish Gray Part 88292 Element 6186635 or 4568954 ×1
  • Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] Dark Bluish Gray Part 15254 Element 6106191 or 6052786 ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box ×4
  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud Dark Bluish Gray Part 4460b Element 4221745 ×3
  • Tile Special Round 1 x 1 with Hollow Bar Dark Bluish Gray Part 20482 Element 6271752 1 spare in the box ×6

Orange 15 pieces

  • Brick Wedged, Curved 2 x 1 with Stud Notch Right Orange Part 29119 Element 6177490 ×2
  • Food Cupcake with Stud Orange Part 79743 Element 6510513 ×5
  • Plant, Flower, Peony Rose with 2 Layers Orange Part 5904 Element 6550815 or 6515227 ×6
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Orange Part 60897 Element 6352223 or 6055326 ×2

Coral 13 pieces

  • Animal / Plant, Coral / Sea Weed Coral Part 49577 Element 6292823 ×1
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Coral Part 24866 Element 6295242 1 spare in the box ×12

Tan 13 pieces

  • Brick 2 x 2 Tan Part 3003 Element 4114306 or 300305 ×1
  • Plate 2 x 2 Tan Part 3022 Element 4114084 or 302205 ×1
  • Plate 2 x 6 Tan Part 3795 Element 4113993 or 379505 ×4
  • Plate Round Corner 6 x 6 Tan Part 6003 Element 6056484 or 4288370 ×4
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Tan Part 32828 Element 6286492 1 spare in the box ×3

Yellow 11 pieces

  • Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×3
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Yellow Part 24866 Element 6299813 1 spare in the box ×7
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Yellow Part 60897 Element 6348065 or 4613258 ×1

Bright Green 10 pieces

  • Plant, Flower, Minifig Accessory with 7 Thick Petals and Pin, Center Ring Bright Green Part 4367 Element 6488792 1 spare in the box ×4
  • Plant, Sea Grass Bright Green Part 30093 Element 6269992 or 6210746 ×3
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Bright Green Part 18674 Element 6380676 ×1
  • Tile Special Round 1 x 1 with Hollow Bar Bright Green Part 20482 Element 6400649 1 spare in the box ×2

Dark Orange 10 pieces

  • Brick 2 x 2 Corner Dark Orange Part 2357 Element 6253417 or 4164442 ×6
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Orange Part 3040b Element 6069259 or 4224730 ×4

Magenta 10 pieces

  • Animal / Plant, Coral / Sea Weed Magenta Part 49577 Element 6390725 ×1
  • Cone 1 x 1 [Top Groove] Magenta Part 59900 Element 6003007 ×7
  • Plant, Grass Stem with Bar Hole [3.2mm] Magenta Part 15279 Element 6432361 ×2

Bright Light Orange 9 pieces

  • Plant, Flower, Minifig Accessory with 7 Thick Petals and Pin, Center Ring Bright Light Orange Part 4367 Element 6452531 1 spare in the box ×6
  • Tile Special Round 1 x 1 with Hollow Bar Bright Light Orange Part 20482 Element 6223719 1 spare in the box ×2
  • Tile, Star with Stud Holder, Pin Hole Bright Light Orange Part 11609 Element 6432033 or 6167776 2 spares in the box ×1

Black 8 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate Round Corner 5 x 5 with 4 x 4 Round Cutout Black Part 80015 Element 6372045 ×4

Medium Nougat 8 pieces

  • Plate 1 x 1 x 2/3 with Open Stud Medium Nougat Part 86996 Element 6383946 ×3
  • Plate 2 x 2 Corner Medium Nougat Part 2420 Element 6177535 ×5

Dark Turquoise 6 pieces

  • Animal / Plant, Coral / Sea Weed Dark Turquoise Part 49577 Element 6262134 ×1
  • Hair Small Tuft Dark Turquoise Part 68212 Element 6434882 1 spare in the box ×5

Lime 6 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Lime Part 24866 Element 6209692 1 spare in the box ×4
  • Plant, Grass Stem with Bar Hole [3.2mm] Lime Part 15279 Element 6188696 or 6055510 ×2

Yellowish Green 6 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Yellowish Green Part 53451 Element 6275487 or 6109556 1 spare in the box ×3
  • Plate Round 1 x 1 with Open Stud Yellowish Green Part 85861 Element 6256092 1 spare in the box ×3

Dark Green 5 pieces

  • Plate Round 1 x 1 with Open Stud Dark Green Part 85861 Element 6230571 1 spare in the box ×5

Dark Purple 4 pieces

  • Animal Body Part, Horn (Cattle) / Tentacle / Vine / Branch / Tongue - Long Dark Purple Part 13564 Element 6430673 1 spare in the box ×4

Light Aqua 4 pieces

  • Bar 1L / Stem with 3 Sprouts/Prongs Light Aqua Part 68211 Element 6446787 1 spare in the box ×2
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Light Aqua Part 24866 Element 6251854 1 spare in the box ×2

Bright Light Yellow 3 pieces

  • Plant, Flower with 5 Pointed Petals and Pin Bright Light Yellow Part 18853 Element 6451205 2 spares in the box ×3

Dark Azure 3 pieces

  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Dark Azure Part 60897 Element 6352226 or 6237230 ×3

Medium Azure 3 pieces

  • Brick Wedged, Curved 2 x 1 with Stud Notch Right Medium Azure Part 29119 Element 6296901 ×3

Medium Lavender 3 pieces

  • Plant, Carrot Medium Lavender Part 33172 Element 6398503 ×3

Trans-Clear 3 pieces

  • Brick Round 2 x 2 Dome Top, Hollow Stud Trans-Clear Part 30367c Element 6507967 or 6264987 ×1
  • Plate Round 1 x 1 with Open Stud Trans-Clear Part 85861 Element 6510164 or 6449836 1 spare in the box ×2

White 3 pieces

  • Plate Round 1 x 1 Swirled Top / Poo White Part 53119 Element 6438901 or 6292800 1 spare in the box ×2
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L White Part 32828 Element 6550170 or 6449593 1 spare in the box ×1

Opal Trans-Dark Pink 2 pieces

  • Plant, Fern 2 x 3 x 2 Opal Trans-Dark Pink Part 2682 Element 6581714 or 6442196 ×2

Blue 1 piece

  • Brick Wedged, Curved 2 x 1 with Stud Notch Right Blue Part 29119 Element 6172411 ×1

Glow in Dark White 1 piece

  • Headwear Accessory Crown Long with Bar Glow in Dark White Part 25516 Element 6364986 1 spare in the box ×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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