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.
326 pieces in 113 part and color combinations, plus 1 minifigure.
LEGO counts 321 pieces. This inventory comes from a separate parts catalog and lists 331, including the 5 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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.
Plate 1 x 3Light Bluish GrayPart 3623Element 4211429 or 3623194×4
Plate 1 x 4Light Bluish GrayPart 3710Element 4211445×2
Plate 2 x 2Light Bluish GrayPart 3022Element 4211397×3
Plate 2 x 6Light Bluish GrayPart 3795Element 4211452 or 3795194×2
Plate 4 x 6Light Bluish GrayPart 3032Element 4211404×1
Plate Special 1 x 2 with Handle on End [Closed Ends]Light Bluish GrayPart 60478Element 4515369×4
Plate Special 1 x 2, Top Clip [Split]Light Bluish GrayPart 92280Element 4598526×4
Technic Axle 5Light Bluish GrayPart 32073Element 32073194 or 4211639×2
Technic Brick 4 x 6 with 2 x 4 OpeningLight Bluish GrayPart 32531Element 4211716×2
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedLight Bluish GrayPart 32123bElement 6271165 or 42115731 spare in the box×4
Technic Gear 40 ToothLight Bluish GrayPart 3649Element 6195314 or 4285634×4
Trans-Red
13 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-RedPart 54200Element 6245252 or 4244363×2
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×10
Windscreen 6 x 6 x 2 CanopyTrans-RedPart 87606Element 6240583 or 6199560×1
Pearl Titanium
11 pieces
Shield with Stud (Batman)Pearl TitaniumPart 37720a×2
Weapon Batman Batarang SmallPearl TitaniumPart 37720b×2
Weapon Batman Batarang with Bar Handle on BottomPearl TitaniumPart 37720d×2
Weapon Batman Batarang with BarsPearl TitaniumPart 37720c×3
Weapon Batman with Stud on FrontPearl TitaniumPart 37720e×2
Red
11 pieces
Brick 1 x 4RedPart 3010Element 301021×1
Brick Round 1 x 1 Open StudRedPart 3062bElement 306221×2
Plate 2 x 2 CornerRedPart 2420Element 242071 or 242021×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]RedPart 2654Element 4617080 or 4278275×2
Plate Special 1 x 4 with 2 Studs, 3 Bottom TubesRedPart 92593Element 4631877×4
Blue
9 pieces
Panel 1 x 2 x 2 [Side Supports / Hollow Studs]BluePart 87552Element 4586548×4
Plate 1 x 2BluePart 3023Element 302323×5
Trans-Clear
8 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-ClearPart 54200Element 6245250 or 4244362×2
Plate 1 x 2Trans-ClearPart 3023Element 6514001 or 6240204×4
Tile 1 x 1 with GrooveTrans-ClearPart 3070bElement 6581822 or 62542541 spare in the box×2
Yellow
8 pieces
Brick 2 x 2YellowPart 3003Element 4103588 or 300374×2
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedYellowPart 32123bElement 6271167 or 32123241 spare in the box×4
Tile 1 x 2 with GrooveYellowPart 3069bElement 306924×2
Orange
7 pieces
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Plate 1 x 4OrangePart 3710Element 4118782×6
Tan
5 pieces
Brick 2 x 4TanPart 3001Element 4114319 or 300105×1
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)TanPart 54200Element 4516055 or 42780691 spare in the box×2
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×2
White
5 pieces
Brick Sloped Inverted 34° 3 x 1 with Internal StopperWhitePart 4287b×2
Motor, Medium, We-Do 2.0WhitePart 21980Element 6456177 or 6290182×2
Plate 4 x 4WhitePart 3031Element 6552127 or 4243812×1
Flat Silver
4 pieces
Wheel 30.4 x 20 without Pinholes, with Reinforced RimFlat SilverPart 56145Element 6106303×4
Lime
2 pieces
Brick 1 x 4LimePart 3010Element 4234716 or 4122449×1
Plate 2 x 2LimePart 3022Element 4613977 or 4537937×1
Reddish Brown
2 pieces
Brick 2 x 2 CornerReddish BrownPart 2357Element 4211200×2
Trans-Orange
2 pieces
Cone 1 x 1 [Top Groove]Trans-OrangePart 59900Element 6514017 or 6172233×2
Dark Turquoise
1 piece
Plate 1 x 2Dark TurquoisePart 3023Element 6213777 or 4218493×1
Sand Green
1 piece
Hinge Brick 1 x 2 BaseSand GreenPart 3937Element 6223234 or 4286649×1
Minifigures
1 figure
Batman, Black Suit, Black Cape, Pearl Titanium Cowl (Armor)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.
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.