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.
2,155 pieces in 560 part and color combinations, plus 4 minifigures.
The official piece count includes the 23 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.
Brick Round 1 x 1 Open StudWhite ×3Trans-Clear ×4Trans-Clear is see-through: hold the piece up to a light.
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallTan ×4Dark Tan ×3Tan is lighter than Dark Tan.
Plate 2 x 3Tan ×3Dark Tan ×6Tan is lighter than Dark Tan.
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Tan ×5Dark Tan ×2Tan is lighter than Dark Tan.
Plate Special 1 x 2 with Three Teeth [Tri-Tooth]Tan ×2Dark Tan ×10Tan is lighter than Dark Tan.
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
8 more look-alike pairs
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Black ×4Dark Bluish Gray ×7Black is darker than Dark Bluish Gray.
Hinge Plate 1 x 2 Locking with 1 Finger on Side, without GrooveBlack ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 2 x 8Black ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 Rounded with 2 Open StudsBlack ×4Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Tile 1 x 4 with GrooveBlack ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Weapon Hilt SymmetricBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Wedge Plate 3 x 2 LeftBlack ×2Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Wedge Plate 3 x 2 RightBlack ×2Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
LEGO's request form asks for the set number (71872) and each piece's element ID, both listed above.
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Clear every mark for this set?
Piece checklist
Black
468 pieces
Animal Body Part, Horn Stacked 45 deg. with Axle ConnectorsBlackPart 2142Element 6422988×1
Arm Mechanical with Clip [Thick Support]BlackPart 98313Element 6276867 or 6006739×6
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]BlackPart 3484Element 6439039Also in Dark Bluish Gray×2
Bar Holder with Hole and Bar HandleBlackPart 23443Element 6321194 or 6143318×2
Bracket 1 x 1 - 1 x 1BlackPart 36841Element 6299338×4
Bracket 1 x 1 - 1 x 2BlackPart 79389Element 6380236×22
Bracket 1 x 2 - 1 x 2 InvertedBlackPart 99780Element 6020193×10
Bracket 1 x 2 - 1 x 4 [Rounded Corners at Bottom, Square Corners at Top]BlackPart 28802Element 6168620×2
Bracket 1 x 2 - 2 x 2BlackPart 44728Element 6117973 or 6048855×2
Bracket 1 x 2 - 2 x 2 InvertedBlackPart 99207Element 6000650×33
Bracket 1 x 2 - 2 x 4BlackPart 93274Element 6118829 or 4616245×2
Bracket 5 x 2 x 1 1/3 with Bottom Stud HolderBlackPart 79180Element 6533639×1
Brick 1 x 1BlackPart 3005Element 300526×2
Brick 1 x 2BlackPart 3004Element 300426×1
Brick 1 x 3BlackPart 3622Element 362226×4
Brick 1 x 4BlackPart 3010Element 301026×2
Brick 2 x 2BlackPart 3003Element 4103587 or 300326×1
Brick 2 x 3BlackPart 3002Element 300226×1
Brick 2 x 4BlackPart 3001Element 300126×2
Brick 2 x 8BlackPart 3007Element 6037390 or 300726×1
Brick Curved 2 x 1 No Studs [1/2 Bow]BlackPart 11477Element 6047276×4
Brick Curved 2 x 2 x 2/3BlackPart 15068Element 6053077×3
Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope EndBlackPart 47457Element 6394979 or 4218575×3
Brick Curved 2 x 4 x 2/3 No Studs, with Bottom TubesBlackPart 88930Element 4587844×2
Brick Curved 3 x 1 No StudsBlackPart 50950Element 4251161×4
Brick Curved 3 x 1 x 2/3BlackPart 7302Element 6566851×2
Brick Curved 4 x 1 Double, No StudsBlackPart 93273Element 4613153×1
Brick Curved 4 x 2 No StudsBlackPart 93606Element 4647286×1
Brick Curved 4 x 3 with 3 Layers, 1 x 3 Cutout on UndersideBlackPart 66955Element 6301371×1
Brick Curved Inverted 2 x 1BlackPart 24201Element 6147050×2
Brick Curved Inverted 2 x 2 x 2/3BlackPart 32803Element 6211476×10
Brick Curved Inverted 4 x 1BlackPart 13547Element 6039869×16
Brick Curved, 3 x 1 with 1/3 Inverted CutoutBlackPart 70681Element 6328095×4
Brick Round Corner 10 x 10 with Slope 33° Edge, Axle Hole, Facet CutoutBlackPart 58846Element 6454174 or 6015466×4
Brick Round Curved 1 x 1 x 1 Quarter DomeBlackPart 5848Element 6586474×2
Brick Sloped 18° 4 x 1BlackPart 60477Element 4515362×4
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)BlackPart 54200Element 4504382 or 42871591 spare in the boxAlso in Dark Bluish Gray×4
Brick Sloped 30° 1 x 1 x 2/3 Double CornerBlackPart 7826Element 65736841 spare in the box×6
Brick Sloped 30° 1 x 2 x 2/3BlackPart 85984Element 4548180×1
Brick Sloped 33° 3 x 4BlackPart 3297Element 6435854 or 329726×8
Brick Sloped 45° 2 x 1 Triple with Inside Stud HolderBlackPart 15571Element 6051508×12
Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version]BlackPart 15672Element 6069000 or 4653087×6
Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud HolderBlackPart 86876Element 6475339×2
Brick Wedged, Curved 4 x 3 No Studs [Plain]BlackPart 64225Element 6009018 or 4539743×1
Oni GeneralMinifigure, checked as a whole figure×1
NateMinifigure, 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.
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.