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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.

The Training Grounds

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21183 The Training Grounds

522 pieces in 161 part and color combinations, plus 3 minifigures.

The official piece count includes the 12 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.

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

Bricks 156 pieces

  • Brick 2 x 4 Bright Pink Part 3001 Element 4520632 or 4497168 ×3
  • Brick 2 x 6 Bright Pink Part 2456 Element 6228963 or 6054860 ×2
  • Brick 1 x 2 with Pixelated Forge Print Dark Bluish Gray Part 3004pr0021 Element 6216860 ×1
  • Brick 1 x 2 with Pixelated Lit Forge Print Dark Bluish Gray Part 3004pr0020 Element 6216862 ×1
  • Brick 1 x 4 Dark Bluish Gray Part 3010 Element 4211103 ×1
  • Brick 2 x 2 Dark Bluish Gray Part 3003 Element 4211060 ×3
  • Brick 2 x 4 Dark Bluish Gray Part 3001 Element 4211085 ×2
  • Brick 2 x 6 Dark Bluish Gray Part 2456 Element 4282819 or 4210875 ×1
  • Brick 2 x 8 Dark Bluish Gray Part 3007 Element 6187438 or 6037406 ×2
  • Brick 1 x 1 Dark Brown Part 3005 Element 6226437 or 6089841 ×10
  • Brick 1 x 1 x 5 with Solid Stud Dark Brown Part 2453b Element 6381675 ×6
  • Brick 2 x 2 Dark Green Part 3003 Element 6214611 or 4271436 ×2
  • Brick 2 x 4 Dark Green Part 3001 Element 4260493 ×3
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×5
  • Brick 1 x 16 Light Bluish Gray Part 2465 Element 4211366 ×2
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×4
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×9
  • Brick 2 x 4 Light Bluish Gray Part 3001 Element 4211385 ×18
  • Brick 2 x 6 Light Bluish Gray Part 2456 Element 4274668 or 4211795 ×1
  • Brick 2 x 8 Light Bluish Gray Part 3007 Element 6037399 or 4211391 ×1
  • Brick 1 x 1 Magenta Part 3005 Element 6022035 ×4
  • Brick 1 x 2 Magenta Part 3004 Element 4519195 or 4206360 ×4
  • Brick 1 x 6 Magenta Part 3009 Element 6056382 or 6014495 ×6
  • Brick 1 x 1 Medium Nougat Part 3005 Element 6057986 or 4569624 ×1
  • Brick 1 x 2 with Reddish Brown and Dark Brown Lines Print Medium Nougat Part 3004pr0014 Element 6097024 ×2
  • Brick 1 x 3 Red Part 3622 Element 362221 ×1
  • Brick 1 x 16 Reddish Brown Part 2465 Element 6258989 ×2
  • Brick 1 x 2 Reddish Brown Part 3004 Element 4613963 or 4211149 ×7
  • Brick 1 x 4 Reddish Brown Part 3010 Element 4211225 ×6
  • Brick 2 x 2 Reddish Brown Part 3003 Element 4211210 ×16
  • Brick 2 x 4 Reddish Brown Part 3001 Element 4211201 ×6
  • Brick 2 x 6 Reddish Brown Part 2456 Element 4286200 or 4216615 ×1
  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×8
  • Brick 1 x 4 Tan Part 3010 Element 4113916 or 301005 ×2
  • Brick 1 x 8 Tan Part 3008 Element 4159774 or 4124002 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×3
  • Brick 2 x 10 White Part 3006 Element 4617855 or 300601 ×1
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×8

Plates 144 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×5
  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×1
  • Plate 6 x 6 Blue Part 3958 Element 4199519 or 395823 ×1
  • Plate 6 x 8 Blue Part 3036 Element 303673 or 303623 ×1
  • Plate 6 x 6 Bright Green Part 3958 Element 6004650 or 4184006 ×4
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×2
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×3
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×3
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×3
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 ×1
  • Plate 4 x 4 Dark Bluish Gray Part 3031 Element 4243831 or 4211089 ×1
  • Plate 6 x 6 Dark Bluish Gray Part 3958 Element 4211134 ×1
  • Plate 6 x 8 Dark Bluish Gray Part 3036 Element 4210794 ×3
  • Plate 2 x 4 Dark Brown Part 3020 Element 6226792 ×2
  • Plate 2 x 6 Dark Brown Part 3795 Element 4518687 Also in Reddish Brown ×4
  • Plate 2 x 12 Dark Green Part 2445 Element 6186824 ×1
  • Plate 2 x 4 Dark Green Part 3020 Element 6618075 or 4586057 ×7
  • Plate 1 x 1 Green Part 3024 Element 302428 1 spare in the box ×2
  • Plate 1 x 2 Green Part 3023 Element 302328 ×3
  • Plate 2 x 2 Corner Green Part 2420 Element 4157120 or 242028 ×8
  • Plate 2 x 3 Green Part 3021 Element 302128 ×1
  • Plate 6 x 8 Green Part 3036 Element 4507311 or 303678 ×3
  • Plate 1 x 1 Light Bluish Gray Part 3024 Element 4211399 1 spare in the box ×8
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 6 x 6 Light Bluish Gray Part 3958 Element 4211474 ×3
  • Plate 1 x 3 Magenta Part 3623 Element 6054864 or 6022048 ×6
  • Plate 1 x 8 Magenta Part 3460 Element 6109929 or 6014477 ×6
  • Plate 2 x 16 Magenta Part 4282 Element 6173062 ×5
  • Plate 2 x 2 Magenta Part 3022 Element 6109930 or 6091599 ×4
  • Plate 2 x 2 Corner Magenta Part 2420 Element 6179916 or 6101075 ×4
  • Plate 2 x 4 Magenta Part 3020 Element 6091608 or 6037658 ×4
  • Plate 2 x 6 Magenta Part 3795 Element 6186656 or 6015126 ×8
  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×2
  • Plate 1 x 1 Reddish Brown Part 3024 Element 4221744 1 spare in the box ×1
  • Plate 1 x 1 with White and Black Squares/Eyes Reddish Brown Part 3024pr0012 Element 6195336 1 spare in the box ×1
  • Plate 1 x 2 Reddish Brown Part 3023 Element 4211150 ×2
  • Plate 1 x 8 Reddish Brown Part 3460 Element 4216945 ×1
  • Plate 2 x 10 Reddish Brown Part 3832 Element 4211214 ×2
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×2
  • Plate 2 x 2 Corner Reddish Brown Part 2420 Element 4211257 ×2
  • Plate 2 x 6 Reddish Brown Part 3795 Element 4211247 Also in Dark Brown ×4
  • Plate 4 x 6 Reddish Brown Part 3032 Element 4271874 or 4211213 ×2
  • Plate 6 x 8 Reddish Brown Part 3036 Element 4223729 ×1
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 1 spare in the box ×1
  • Plate 1 x 10 Tan Part 4477 Element 4143409 or 447705 ×1
  • Plate 1 x 4 Tan Part 3710 Element 4113233 or 371005 ×4
  • Plate 2 x 8 Tan Part 3034 Element 4113988 or 303405 ×2
  • Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 1 spare in the box ×2
  • Plate 1 x 1 Trans-Light Blue Part 3024 Element 6513964 or 6252043 1 spare in the box ×2
  • Plate 1 x 1 x 2/3 with Open Stud White Part 86996 Element 6383985 ×1
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×1

Plates Special 70 pieces

  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Black Part 87580 Element 6663108 or 4565323 Also in Dark Bluish Gray ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Bright Green Part 87580 Element 6389695 or 4565388 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 Also in Black ×18
  • Plate Special 2 x 2 with Only 2 studs Dark Brown Part 33909 Element 6347604 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Green Part 87580 Element 6186827 ×7
  • Bracket 1 x 2 - 2 x 2 Green Part 44728 Element 6117971 or 6048853 ×4
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Green Part 60470b Element 6347288 or 4556159 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Green Part 87580 Element 6389692 or 4565321 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×3
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Magenta Part 87580 Element 6250075 or 6126069 ×8
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Medium Nougat Part 87580 Element 6102994 ×4
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Reddish Brown Part 60478 Element 6102975 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Reddish Brown Part 87580 Element 4565394 ×2
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Reddish Brown Part 32828 Element 6306775 or 6233909 1 spare in the box ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Tan Part 15573 Element 6092587 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Trans-Dark Blue Part 87580 Element 6499253 or 6382531 ×2

Plates Round Curved and Dishes 48 pieces

  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×25
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×6
  • Plate Round 1 x 1 with Open Stud Reddish Brown Part 85861 Element 6215659 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Tan Part 6141 Element 4161734 or 614105 1 spare in the box ×4
  • Plate Round 1 x 1 with Open Stud White Part 85861 Element 6168642 or 4547649 1 spare in the box ×12

Tiles 30 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1
  • Tile 2 x 2 with Groove Bright Pink Part 3068b Element 4615728 ×2
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 ×1
  • Tile 2 x 4 with Groove Dark Bluish Gray Part 87079 Element 4560184 ×8
  • Tile 1 x 6 with Groove Dark Brown Part 6636 Element 6295366 ×4
  • Tile 2 x 4 with Groove Dark Brown Part 87079 Element 6566046 or 6381678 ×3
  • Tile 2 x 2 with Dark Brown Minecraft Grid Print (Crafting Table) Medium Nougat Part 3068bpr0236 Element 6097003 ×1
  • Tile 1 x 1 with Groove Reddish Brown Part 3070b Element 4211288 1 spare in the box ×6
  • Tile 1 x 1 with Groove Tan Part 3070b Element 4125253 1 spare in the box ×1
  • Tile 1 x 3 Tan Part 63864 Element 6131896 ×1
  • Tile 1 x 8 with Groove Tan Part 4162 Element 4544139 or 4519964 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1

Plants & Trees 21 pieces

  • Plant, Flower 2 x 2 Leaves - Angular Bright Green Part 4727 Element 4143562 ×5
  • Plant, Leaves, Round 2 x 2 x 2/3 with + Axle Hole and 4 Leaf Extensions Dark Pink Part 15469 Element 6050927 ×1
  • Plant, Flower Stem with Bottom Bar Green Part 24855 Element 6269971 or 6135278 1 spare in the box ×3
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Medium Lavender Part 24866 Element 6209684 1 spare in the box ×9
  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Orange Part 24866 Element 6214234 1 spare in the box ×3

Bricks Special 10 pieces

  • Brick Special 1 x 1 with Studs on 2 Sides Black Part 47905 Element 4214559 ×1
  • Brick Special 1 x 2 with Masonry Brick Profile Dark Bluish Gray Part 98283 Element 6000311 ×2
  • Brick Special 1 x 1 Studs on 4 Sides Reddish Brown Part 4733 Element 6133765 or 4528447 ×1
  • Brick Special 1 x 1 with Studs on 2 Sides Sand Green Part 47905 Element 6125672 ×4
  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder White Part 86876 Element 6548293 or 6383982 ×2

Tiles Round and Curved 9 pieces

  • Tile Round 1 x 1 Bright Light Orange Part 98138 Element 6322822 1 spare in the box ×8
  • Tile Round 1 x 1 with Cookie Print Medium Nougat Part 98138pr0018 Element 6287854 or 6055384 1 spare in the box ×1

Windows and Doors 9 pieces

  • Window 1 x 2 x 2 Flat Front Tan Part 60592 Element 6387150 or 6378142 ×5
  • Glass for Window 1 x 2 x 2 Flat White Part 60601 Element 6550173 or 6256077 ×4

Minifig Shields, Weapons, & Tools 5 pieces

  • Tool Pickaxe Blocky, Double Medium Azure Part 18789 Element 6093629 ×1
  • Weapon Bow and Arrow, Blocky Medium Lavender Part 18792 Element 6167567 ×1
  • Weapon Sword Blocky Pearl Gold Part 18787 Element 6093621 ×1
  • Weapon Sword Blocky Pearl Titanium Part 18787 Element 6350506 ×1
  • Weapon Bow and Arrow, Blocky Reddish Brown Part 18792 Element 6089103 ×1

Minifig Neckwear 3 pieces

  • Minifig Neckwear Bracket [One Stud] - Reinforced Dark Brown Part 28974 Element 6277183 ×2
  • Minifig Neckwear Armour Breastplate Rectangular (Minecraft) Medium Azure Part 19723 Element 6581886 or 6503113 ×1

Tiles Special 3 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×1
  • Tile Special 2 x 2 Inverted Dark Bluish Gray Part 11203 Element 6013082 ×1
  • Tile Special Round 1 x 1 with Hollow Bar Trans-Clear Part 20482 Element 6507895 or 6186867 1 spare in the box ×1

Hinges, Arms and Turntables 2 pieces

  • Plate Special 4 x 6 with Trap Door Hinge [Long Pins] Dark Bluish Gray Part 92099 Element 4595710 ×1
  • Plate Special 6 x 8 Trap Door Frame Horizontal [Long Pin Holders] Dark Bluish Gray Part 92107 Element 4595708 ×1

Minifig Heads 2 pieces

  • Minifig Head Special, Cube [Plain] Tan Part 19729 Element 6265236 ×1
  • Minifig Head [Plain] [Vented Stud - 2 Holes] Trans-Light Blue Part 28621 Element 6513993 or 6168667 ×1

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Light Bluish Gray Part 32064a Element 6206249 or 4233493 ×2

Bars, Ladders and Fences 1 piece

  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Medium Nougat Part 6020 Element 6381680 ×1

Bricks Round and Cones 1 piece

  • Brick Round 1 x 1 Open Stud Tan Part 3062b Element 4117070 or 306205 ×1

Bricks Sloped 1 piece

  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Medium Azure Part 3660 Element 6070756 ×1

Containers 1 piece

  • Container Box 2 x 2 x 2 - Top Opening Reddish Brown Part 61780 Element 4520638 ×1

Energy Effects 1 piece

  • Wave / Flame Small with Pin Trans-Orange Part 37775 Element 6514274 or 6357747 1 spare in the box ×1

Minifig Headwear 1 piece

  • Helmet Rectangular Medium Azure Part 19730 Element 6192828 or 6101987 ×1

Technic Axles 1 piece

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1

Tools 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Minifigures 3 figures

  • Skeleton, Square Skull (60115 Torso) Minifigure, checked as a whole figure ×1
  • Ninja Minifigure, checked as a whole figure ×1
  • Rogue 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.

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