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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.

Caverns of Nathuz

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3859 Caverns of Nathuz

223 pieces in 67 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 Special 54 pieces

  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 ×22
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Tan Part 87580 Element 6126075 or 4578032 Also in Tan ×22
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Light Bluish Gray Part 60897 Element 6296894 or 4613956 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Reddish Brown Part 87580 Element 4565394 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Tan Part 87580 Element 4565387 Also in Dark Tan ×4

Plates 38 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×3
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 Also in Dark Bluish Gray ×4
  • Plate 6 x 6 Black Part 3958 Element 395826 ×5
  • Plate 8 x 8 Black Part 41539 Element 4166619 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×5
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×1
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 Also in Black ×1
  • Plate 1 x 4 Red Part 3710 Element 371021 ×1
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×2
  • Plate 2 x 3 Reddish Brown Part 3021 Element 4211189 ×6
  • Plate 2 x 8 Reddish Brown Part 3034 Element 4211211 ×1
  • Plate 6 x 6 Tan Part 3958 Element 4125217 ×2
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1

Bricks Round and Cones 33 pieces

  • Cone 1 x 1 [Top Groove] Pearl Gold Part 59900 Element 4529247 ×10
  • Cone 1 x 1 [Top Groove] Red Part 59900 Element 4529234 Also in Trans-Red ×12
  • Cone 1 x 1 [Top Groove] Reddish Brown Part 59900 Element 4529242 ×4
  • Brick Round 1 x 1 Open Stud Trans-Clear Part 3062b Element 6514232 or 6223655 ×4
  • Cone 1 x 1 [Top Groove] Trans-Red Part 59900 Element 6514021 or 6337596 Also in Red ×3

Bricks Sloped 28 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×7
  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud Dark Bluish Gray Part 4460b Element 4221745 ×6
  • Brick Sloped Inverted 45° 2 x 1 Dark Bluish Gray Part 3665 Element 4211096 ×2
  • Brick Sloped Inverted 75° 2 x 1 x 3 Dark Bluish Gray Part 2449 Element 4500975 or 4226442 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Green Part 54200 Element 6618111 or 4504375 1 spare in the box ×7
  • Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Light Bluish Gray Part 3048c Element 4211411 ×2
  • Brick Sloped 65° 2 x 2 x 2 with Bottom Tube Light Bluish Gray Part 3678b Element 4234535 or 4215353 ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Light Bluish Gray Part 3660 Element 4211436 ×1

Plates Round Curved and Dishes 15 pieces

  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Dark Bluish Gray Part 6141 Element 4210633 1 spare in the box ×9
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×4
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1

Bricks Special 8 pieces

  • Die - 6 Sided Rubber Frame with Red Centre Studs (Board Games) Black Part 64776pat0001 Element 4539364 ×1
  • Brick Special 1 x 1 with Stud on 1 Side Dark Bluish Gray Part 87087 Element 4558955 ×2
  • Brick Special 1 x 4 with Groove Light Bluish Gray Part 2653 Element 4211613 ×5

Minifig Shields, Weapons, & Tools 8 pieces

  • Weapon Axe with Twin-Blade Dark Bluish Gray Part 95052 ×1
  • Weapon Bow and Arrow Small Dark Bluish Gray Part 95051 ×1
  • Weapon Dagger / Knife [Flat Hilt End] Dark Bluish Gray Part 95054 ×2
  • Weapon Staff with Hooked End (King) Dark Bluish Gray Part 95050 ×1
  • Weapon Staff with Spherical End (King) Dark Bluish Gray Part 95049 ×1
  • Weapon Sword Small [Angular Hilt] Dark Bluish Gray Part 95053 ×1
  • Tool Crowbar Red Part 92585 Element 4599453 ×1

Tiles 8 pieces

  • Tile 2 x 2 with Heroica Shield Print Black Part 3068bpr0334 Element 6023720 or 4625437 ×1
  • Tile 1 x 1 with Groove Reddish Brown Part 3070b Element 4211288 1 spare in the box ×2
  • Tile 2 x 2 with 1 Black Dot, Skull and Sword Print Tan Part 3068bpr0321 Element 6023719 or 4625436 ×1
  • Tile 2 x 2 with 2 Black Dots and Skull Print Tan Part 3068bpr0324 Element 4625428 ×2
  • Tile 2 x 2 with 3 Black Dots and Sword Print Tan Part 3068bpr0325 Element 6023716 or 4625429 ×2

Minifigs 7 pieces

  • Microfig Heroica Rogue Black Part 85863pr0052 Element 6023710 ×1
  • Microfig Heroica Golem Lord Dark Bluish Gray Part 85863pr0075 Element 6024395 or 4621885 ×1
  • Microfig Heroica Golem Guardian Light Bluish Gray Part 85863pr0074 Element 4621882 ×3
  • Microfig Heroica Wizard Red Part 85863pr0055 Element 6023707 or 4613071 ×1
  • Microfig Heroica Barbarian Yellow Part 85863pr0053 Element 6023701 or 4613069 ×1

Bricks 6 pieces

  • Brick 2 x 2 Corner Dark Bluish Gray Part 2357 Element 4211109 ×2
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×1
  • Brick 1 x 1 Reddish Brown Part 3005 Element 4211242 ×2
  • Brick 1 x 1 Trans-Dark Blue Part 3005 Element 6514215 or 6494117 ×1

Minifig Accessories 6 pieces

  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Dark Brown Part 64644 Element 4538950 ×5
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Pearl Gold Part 64644 Element 4538126 ×1

Energy Effects 5 pieces

  • Flame / Headwear Accessory Plume / Feather, Triple Point Trans-Neon Orange Part 64647 Element 6289248 or 6100033 1 spare in the box ×5

Animals / Creatures 4 pieces

  • Animal, Bat Black Part 30103 Element 4587312 or 4106513 ×4

Animal / Creature Body Parts 2 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Flat Silver Part 53451 Element 6270108 or 4612901 1 spare in the box ×2

Rock 1 piece

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Green Part 30153 Element 6513970 or 6247788 ×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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