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.
840 pieces in 226 part and color combinations, plus 7 minifigures.
LEGO counts 860 pieces. This inventory comes from a separate parts catalog and lists 869, including the 29 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.
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 1 x 2Black ×33Dark Bluish Gray ×9Black is darker than Dark Bluish Gray.
Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric RidgesBlack ×6Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Brick 2 x 2 CornerBlack ×5Dark Bluish Gray ×7Black is darker than Dark Bluish Gray.
Brick Curved 3 x 1 No StudsBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Tile 1 x 4 with GrooveBlack ×7Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Tile 1 x 8 with GrooveBlack ×12Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Brick Special 1 x 2 Palisade [aka Log]TanPart 30136Element 4218749 or 4114053×4
Tile 1 x 1 with Padlock PrintTanPart 3070bpr0003Element 4225289×2
Trans-Light Blue
5 pieces
Bar 4L (Lightsaber Blade / Wand)Trans-Light BluePart 30374Element 6507882 or 6170187×2
Glass for Window 1 x 2 x 2 PlaneTrans-Light BluePart 4862Element 486242×2
Windscreen 2 x 6 x 2, Wide TopTrans-Light BluePart 4176Element 4287016 or 417642×1
Trans-Dark Blue
4 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-Dark BluePart 54200Element 6245256 or 4244366×2
Tile 1 x 2 with GrooveTrans-Dark BluePart 3069bElement 6514219 or 6251289×2
Trans-Neon Green
4 pieces
Cone 1 x 1 [No Top Groove]Trans-Neon GreenPart 4589Element 618849 or 458949×4
Trans-Brown
2 pieces
Panel 4 x 4 x 6 Quarter CylinderTrans-BrownPart 30562Element 6289504 or 4195908×2
Trans-Neon Orange
2 pieces
Wave / Flame Rounded with Base PegsTrans-Neon OrangePart 6126a×2
Pearl Gold
1 piece
Tile Special 1 x 2 Grille with Bottom GroovePearl GoldPart 2412bElement 4490599×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 7785-1[No Color/Any Color]Part 57325Element 4492330×1
Minifigures
7 figures
Poison Ivy with Light Nougat Shoulders and Arms and Dark Red Straight HairMinifigure, checked as a whole figure×1
Batman, Black Suit, Black Cape and Cowl, Gold Batman Logo (56630 Cape)Minifigure, checked as a whole figure×1
The Riddler with Black HairMinifigure, checked as a whole figure×1
Scarecrow with Glow in the Dark Head and Black HatMinifigure, checked as a whole figure×1
Nightwing with Black Eyemask and Blue Chest Logo and Spiky HairMinifigure, checked as a whole figure×1
Arkham Asylum Guard, Black Cap, Medium Brown HeadMinifigure, checked as a whole figure×1
Arkham Asylum Guard, Black Cap, Light Nougat HeadMinifigure, 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.