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.
487 pieces in 185 part and color combinations, plus 3 minifigures.
The official piece count includes the 19 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.
Bracket 1 x 2 - 1 x 2 InvertedBlack ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Round 4 x 4 with Pin HoleBlackPart 60474Element 4515350×1
Plate Special 1 x 2 [Side Handle Closed Ends]BlackPart 48336Element 4225201×2
Plate Special 1 x 2 with Clips Horizontal [Open O Clips]BlackPart 60470bElement 6310268 or 4556158×1
Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L AxleBlackPart 18651Element 6089119×2
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×2
Technic Brick 1 x 2 [1 Pin Hole]BlackPart 3700Element 370026×1
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle HoleBlackPart 92013Element 4619763×2
Technic Brick Special 2 x 2 with Pin Hole, with 2 Rotation Joint SocketsBlackPart 48172Element 6296186 or 4275826×1
Technic Pin with Friction Ridges Lengthwise and Center SlotsBlackPart 2780Element 4121715 or 278026×1
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with FrictionBlackPart 47455Element 4272426 or 4213374×4
Tile 1 x 6 with GrooveBlackPart 6636Element 663626×4
Tile Special Round 2 x 2 with HoleBlackPart 15535Element 6143850×1
Weapon Scythe / Crescent Blade Serrated with BarBlackPart 98141Element 6270143 or 6039203×1
Trans-Neon Orange
27 pieces
Dish 2 x 2 Inverted [Radar]Trans-Neon OrangePart 4740Element 6245295 or 3006347×1
Flag 5 x 6 Hexagonal with U ClipsTrans-Neon OrangePart 17979Element 6291015 or 6124860×2
Flag 7 x 3 with Rod - Merlok and Crook Hologram PrintTrans-Neon OrangePart 30292pr0002Element 6210529×1
Large Figure Weapon, Sword 1 x 13 with 1x2 Plate, Angled Side Extensions, Textured Panel Inset with HexagonsTrans-Neon OrangePart 27934Element 6166860×2
Plate Round 1 x 1 with Solid StudTrans-Neon OrangePart 6141Element 6240218 or 3005747×12
Technic Wedge Belt Wheel [aka Pulley]Trans-Neon OrangePart 4185Element 6124680 or 4172601×1
Tile Special 2 x 3 with 2 Clips [Thick Open O Clips]Trans-Neon OrangePart 30350bElement 6133781×2
Weapon Sword Long with Angular Crossguard Pearl Gold PatternTrans-Neon OrangePart 24108pat0003×1
Windscreen 5 x 2 x 1 2/3Trans-Neon OrangePart 6070Element 6252517 or 6120916×4
Windscreen 6 x 4 x 1 Hexagonal with HandleTrans-Neon OrangePart 27262Element 6210498×1
Trans-Bright Green
13 pieces
Dish 2 x 2 Inverted [Radar]Trans-Bright GreenPart 4740Element 6589436 or 6518820×1
Flag 7 x 3 with Rod - Monstrox Hologram PrintTrans-Bright GreenPart 30292pr0003Element 6210538×1
Headwear Accessory Helmet Wing with PinTrans-Bright GreenPart 35042Element 6205442×3
Plate Round 1 x 1 with Solid StudTrans-Bright GreenPart 6141Element 6514053 or 6240206×7
Tile Special 2 x 3 Pentagonal with Nexo Power Shield Print - Jungle DragonTrans-Bright GreenPart 22385pr0017Element 6245472 or 6133304×1
Orange
9 pieces
Hinge Plate 1 x 2 Locking with 2 Fingers on Side, 9 TeethOrangePart 60471Element 6167289×3
Hinge Plate 2 x 2 Locking with 1 Finger on TopOrangePart 92582Element 6167290×2
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)OrangePart 4032aElement 6030521 or 4164243×2
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]OrangePart 32054Element 6143033 or 4229603×2
Flat Silver
7 pieces
Insect Accessory, Spider Head and LegsFlat SilverPart 35039Element 6208782×3
Large Figure Weapon Claw, with ClipFlat SilverPart 92220Element 6214125 or 4659335×4
Blue
6 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×6
Pearl Titanium
6 pieces
Arm Mechanical with Clip [Thick Support]Pearl TitaniumPart 98313Element 6276869 or 6008484×2
Bar 1L with Top Stud and Two Side StudsPearl TitaniumPart 92690Element 6158415×1
Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round StudsPearl TitaniumPart 75937Element 6197967×1
Shield Pentagonal with SpikesPearl TitaniumPart 35035Element 6208780×1
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L AxleRedPart 11214Element 6209519×1
Tan
2 pieces
Technic Axle 4 with Centre StopTanPart 99008Element 4666999×2
Dark Tan
1 piece
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×1
Lime
1 piece
Tile Special Round 2 x 2 with HoleLimePart 15535Element 6167483×1
Metallic Gold
1 piece
Tile Special 2 x 3 Pentagonal with Nexo Power Shield Print - Merlok Power SwordMetallic GoldPart 22385pr1004Element 6247824 or 6210510×1
Reddish Brown
1 piece
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×1
Trans-Dark Blue
1 piece
Tile Special 2 x 3 Pentagonal with Nexo Power Shield Print - Whirl WindTrans-Dark BluePart 22385pr0018Element 6247413 or 6133662×1
White
1 piece
Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 TeethWhitePart 30553Element 6194850×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 72004-1[No Color/Any Color]Part 36773Element 6213667×1
Minifigures
3 figures
CyberByterMinifigure, checked as a whole figure×1
Clay Moorington with Tran-Orange VisorMinifigure, checked as a whole figure×1
InfectoByter / MechaByterMinifigure, 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.