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.
2,879 pieces in 577 part and color combinations, plus 17 minifigures.
The official piece count includes the 74 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.
Plate Round 1 x 1 with Open StudWhite ×13Trans-Clear ×8Trans-Clear is see-through: hold the piece up to a light.
Brick Round 1 x 1 Open StudYellow ×1Trans-Yellow ×3Trans-Yellow is see-through: hold the piece up to a light.
Bracket 1 x 2 - 2 x 2 InvertedBlack ×3Dark Blue ×3Black is yellower and darker than Dark Blue.
Plate Special 2 x 2 with Only 2 studsBlack ×1Dark Blue ×3Black is yellower and darker than Dark Blue.
Tile 1 x 2 with GrooveBlack ×4Dark Blue ×4Black is yellower and darker than Dark Blue.
Tile 1 x 6 with GrooveBlack ×3Dark Blue ×2Black is yellower and darker than Dark Blue.
17 more look-alike pairs
Brick 1 x 4Black ×5Dark Bluish Gray ×31Black is darker than Dark Bluish Gray.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Black ×3Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Door Frame 1 x 4 x 6 Type 2Black ×4Dark Bluish Gray ×12Black is darker than Dark Bluish Gray.
Plate 1 x 3Black ×6Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate 2 x 3Black ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 with Door RailBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 1 x 4 with 2 Studs with Groove [New Underside]Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Black ×1Dark Bluish Gray ×10Black is darker than Dark Bluish Gray.
Tile 1 x 2 with GrooveBlack ×4Dark Bluish Gray ×11Black is darker than Dark Bluish Gray.
Tile 1 x 2 with Stud Notch LeftBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Tile 1 x 2 with Stud Notch RightBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Tile 1 x 6 with GrooveBlack ×3Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Tile 2 x 2 CornerBlack ×2Dark Bluish Gray ×15Black is darker than Dark Bluish Gray.
Tile 2 x 2 with GrooveBlack ×15Dark Bluish Gray ×35Black is darker than Dark Bluish Gray.
Tile Special 1 x 1 with Clip with Rounded EdgesBlack ×6Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Window 1 x 2 x 2 Flat FrontBlack ×25Dark Bluish Gray ×11Black is darker than Dark Bluish Gray.
Window 1 x 4 x 3 without Shutter TabsBlack ×3Dark Bluish Gray ×7Black is darker than Dark Bluish Gray.
Baseplate 32 x 32Dark Bluish GrayPart 3811Element 6139364 or 4560729×1
Containers
1 piece
Box / Crate with Handholds 3 x 4 x 1 2/3YellowPart 30150Element 4599378×1
Minifig Headwear
1 piece
Hat, Conical Asian StyleBlackPart 93059Element 6524932×1
Rock
1 piece
Rock 1 x 1 Crystal 5 PointTrans-Light BluePart 30385Element 6507865 or 6296003×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
17 figures
Batwoman, Black/Red CapeMinifigure, checked as a whole figure×1
Bane, Prison Clothes, Neck BracketMinifigure, checked as a whole figure×1
Batman, Black Suit, Black Cowl, Cloth CapeMinifigure, checked as a whole figure×1
The Joker, Prison ClothesMinifigure, checked as a whole figure×1
Security Guard, Black Vest, Dark Blue LegsMinifigure, checked as a whole figure×1
Killer Croc, Prison ClothesMinifigure, checked as a whole figure×1
Robin, Dark Bluish Grey Torso, Medium Legs, CapeMinifigure, checked as a whole figure×1
Harley Quinn, Prison ClothesMinifigure, checked as a whole figure×1
The Riddler, Bright Green SuitMinifigure, checked as a whole figure×1
Mr. Freeze, Sand Blue Suit, Bright Light Blue TanksMinifigure, checked as a whole figure×1
The Scarecrow, Prison ClothesMinifigure, checked as a whole figure×1
Poison Ivy, Lime SuitMinifigure, checked as a whole figure×1
Security Guard, Black Vest, Dark Blue LegsMinifigure, checked as a whole figure×1
BatwingMinifigure, checked as a whole figure×1
Catwoman, Red GogglesMinifigure, checked as a whole figure×1
The Penguin, Prison ClothsMinifigure, checked as a whole figure×1
Arkham Asylum StatueMinifigure, 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.