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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.

Atlantis Treasure

Checking

3851 Atlantis Treasure

280 pieces in 66 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 77 pieces

  • Plate 1 x 10 Blue Part 4477 Element 447723 ×20
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×4
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×16
  • Plate 2 x 12 Blue Part 2445 Element 244523 ×4
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2
  • Plate 2 x 16 Dark Blue Part 4282 Element 6120642 or 4595189 ×16
  • Plate 6 x 14 Dark Blue Part 3456 Element 6310975 or 4595163 ×2
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×4
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 ×2
  • Plate 4 x 4 Corner Dark Bluish Gray Part 2639 Element 4539429 ×4
  • Plate 4 x 8 Dark Bluish Gray Part 3035 Element 4211061 ×1
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×1

Tiles 46 pieces

  • Tile 2 x 2 with Groove Green Part 3068b Element 4107762 or 306828 ×1
  • Tile 1 x 1 with Groove Orange Part 3070b Element 4558595 or 4277770 1 spare in the box ×2
  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 1 spare in the box ×2
  • Tile 1 x 2 with Groove Trans-Dark Blue Part 3069b Element 6514219 or 6251289 ×12
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile 2 x 2 with Compass East 'E' in Lime Pointer Print White Part 3068bpr0175 Element 4594220 ×6
  • Tile 2 x 2 with Compass North 'N' in Light Blue Pointer Print White Part 3068bpr0176 Element 4594221 ×6
  • Tile 2 x 2 with Compass South 'S' in Dark Red Pointer Print White Part 3068bpr0177 Element 4594223 ×6
  • Tile 2 x 2 with Compass West 'W' in Tan Pointer Print White Part 3068bpr0178 Element 4594308 ×6
  • Tile 2 x 2 with Torpedo and Bubbles in Porthole Print White Part 3068bpr0183 Element 4595224 ×1
  • Tile 1 x 1 with Groove Yellow Part 3070b Element 307024 1 spare in the box ×2

Plates Special 39 pieces

  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Blue Part 87580 Element 6126049 or 4565319 ×8
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Dark Bluish Gray Part 60897 Element 6489464 or 6296892 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Dark Bluish Gray Part 3794a ×8
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 ×13
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Orange Part 61252 Element 6347295 or 4593773 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Red Part 61252 Element 6335377 or 4524644 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] White Part 61252 Element 6347293 or 4538353 ×2
  • Plate Special 1 x 1 with Tooth White Part 49668 Element 6601935 or 4224792 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Yellow Part 61252 Element 6347294 or 4540040 ×2

Bricks 20 pieces

  • Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×4
  • Brick 2 x 2 Dark Red Part 3003 Element 4539104 or 4249850 ×4
  • Brick 2 x 2 Lime Part 3003 Element 4220632 or 4122451 ×4
  • Brick 2 x 2 Medium Blue Part 3003 Element 4205047 or 4201235 ×4
  • Brick 2 x 2 Tan Part 3003 Element 4114306 or 300305 ×4

Bricks Special 17 pieces

  • Die - 6 Sided Rubber Frame with Red Centre Studs (Board Games) Black Part 64776pat0001 Element 4539364 ×1
  • Brick Special 1 x 1 Studs on 4 Sides Dark Bluish Gray Part 4733 Element 4210700 ×4
  • Brick Special 1 x 2 Palisade [aka Log] Dark Bluish Gray Part 30136 Element 4211095 ×4
  • Brick Special 1 x 1 with Clip Vertical [Thick U Clip, Solid Stud] Light Bluish Gray Part 60475a Element 4515357 ×8

Bricks Sloped 14 pieces

  • 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 Also in Trans-Brown ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×4
  • Brick Sloped 45° 2 x 2 Double Convex Dark Bluish Gray Part 3045 Element 4210646 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Brown Part 54200 Element 6245263 or 4244368 1 spare in the box Also in Dark Bluish Gray ×4

Plates Round Curved and Dishes 13 pieces

  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Orange Part 6141 Element 4157103 1 spare in the box ×1
  • Dish 2 x 2 Inverted [Radar] Red Part 4740 Element 4585146 or 4279383 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×8
  • Plate Round 1 x 1 with Open Stud White Part 85861 Element 6168642 or 4547649 1 spare in the box ×1
  • Dish 2 x 2 Inverted [Radar] Yellow Part 4740 Element 4169960 or 4107622 ×1

Bricks Round and Cones 12 pieces

  • Cone 1 x 1 [Top Groove] Blue Part 59900 Element 4529235 ×4
  • Brick Round 1 x 1 Open Stud Trans-Green Part 3062b Element 6514234 or 6238046 ×8

Minifig Shields, Weapons, & Tools 10 pieces

  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1
  • Weapon Lightsaber Hilt with Bottom Ring Light Bluish Gray Part 64567 Element 4581155 or 4539481 ×8
  • Weapon Trident Pearl Gold Part 92290 Element 6270116 or 4595077 ×1

Plants & Trees 8 pieces

  • Plant, Sea Grass Green Part 30093 Element 4568215 or 4163425 ×8

Rock 8 pieces

  • Rock 1 x 1 Crystal 5 Point Trans-Neon Green Part 30385 Element 6170290 or 4540417 ×8

Bars, Ladders and Fences 4 pieces

  • Antenna 1 x 4 with Rounded Top Blue Part 3957a Element 395723 ×4

Technic Connectors 4 pieces

  • Technic Pin Connector Round [Slotted] Blue Part 62462 Element 6210497 or 4595160 ×4

Minifig Accessories 3 pieces

  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×3

Transportation - Land 2 pieces

  • Steering Wheel Small, 2 x 2 Light Bluish Gray Part 30663 Element 30663194 or 4211701 ×2

Minifigs 1 piece

  • Microfig Dark Red Treasure King Trident Print Pearl Gold Part 85863pr0042 Element 4594202 ×1

Technic Special 1 piece

  • Technic Ball Joint Black Part 32474 Element 4290713 or 4143539 ×1

Tiles Special 1 piece

  • Tile Special 1 x 2 Grille with Bottom Groove Yellow Part 2412b Element 241224 ×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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