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.
266 pieces in 125 part and color combinations, plus 4 minifigures.
LEGO counts 278 pieces. This inventory comes from a separate parts catalog and lists 284, including the 18 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 Curved 4 x 1 Double, No StudsBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Brick Sloped 30° 1 x 2 x 2/3Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Brick Sloped 18° 4 x 2YellowPart 30363Element 4124463×1
Lever Small Base with Black LeverYellowPart 298c02Element 741561 spare in the box×2
Plate 1 x 2YellowPart 3023Element 302324×10
Plate 2 x 4YellowPart 3020Element 302024×3
Plate Round 1 x 1 with Solid StudYellowPart 6141Element 6141242 spares in the box×6
Tile 2 x 2 with GrooveYellowPart 3068bElement 6388487 or 306824×1
Green
17 pieces
Brick 1 x 1GreenPart 3005Element 300528×2
Brick 1 x 4GreenPart 3010Element 4112838 or 301028×1
Brick 2 x 2 CornerGreenPart 2357Element 4125281 or 4112544×2
Brick Sloped 33° 3 x 1GreenPart 4286Element 4107637 or 428628×4
Plate 1 x 4GreenPart 3710Element 371028×1
Plate 2 x 6GreenPart 3795Element 379528×2
Plate Special 1 x 2 with Clips Horizontal [Open O Clips]GreenPart 60470bElement 6347288 or 4556159×1
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]GreenPart 32064b×2
Wedge Plate 3 x 2 LeftGreenPart 43723Element 4621946 or 4180538×1
Wedge Plate 3 x 2 RightGreenPart 43722Element 4621947 or 4180510×1
Red
12 pieces
Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' OrientationRedPart 30361cElement 6251169 or 6173050×1
Brick Special 1 x 1 with Stud on 1 SideRedPart 87087Element 4558886×6
Flag 4 x 1 Wavy [First Wave Right]RedPart 4495bElement 6268946 or 449521×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]RedPart 2654Element 4617080 or 4278275×3
Technic Axle and Pin Connector Angled #2 - 180°RedPart 32034Element 6351572 or 4234429×1
Dark Purple
9 pieces
Brick Curved 2 x 2 with Lip, No StudsDark PurplePart 30602Element 4566523×1
Brick Sloped 30° 1 x 2 x 2/3Dark PurplePart 85984Element 4566607×2
Plate Round 1 x 1 with Solid StudDark PurplePart 6141Element 45665221 spare in the box×4
Windscreen 5 x 2 x 1 2/3Dark PurplePart 6070Element 4650619×2
White
7 pieces
Arm Mechanical with 2 Clips [Battle Droid]WhitePart 30377Element 6321345 or 42606491 spare in the box×4
Brick Round 2 x 2 Dome Top with Angry Eyes and Grin Print (Joker Bomb)WhitePart 30367cpr0020Element 4655683×1
String with End Studs and Minifig Grips 21LWhitePart 14210Element 6096959 or 60374481 spare in the box×1
Tail ShuttleWhitePart 6239Element 623901×1
Trans-Orange
4 pieces
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-OrangePart 58176Element 6507868 or 6171764×4
Dark Green
2 pieces
Panel 1 x 2 x 1 [Square Corners]Dark GreenPart 4865aElement 4528713×2
Dark Tan
2 pieces
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×2
Tan
2 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×2
Trans-Dark Blue
2 pieces
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-Dark BluePart 58176Element 6328198 or 6171763×2
Trans-Red
2 pieces
Cone 1 x 1 [Top Groove]Trans-RedPart 59900Element 6514021 or 6337596×1
Wave / Flame Rounded Large with Marbled Trans-Orange PatternTrans-RedPart 85959pat0001Element 4548009×1
Trans-Yellow
2 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-YellowPart 54200Element 6245272 or 42609421 spare in the box×2
[No Color/Any Color]
2 pieces
Comic Book, Super Heroes, DC Universe, Issue 4 (6004468 / 6005847)[No Color/Any Color]Part 6004468×1
Sticker Sheet for Set 6863-1[No Color/Any Color]Part 75011Element 4659239×1
Orange
1 piece
Plate Round 1 x 1 with Solid StudOrangePart 6141Element 41571031 spare in the box×1
Trans-Brown
1 piece
Windscreen 7 x 4 x 2 Round with HandleTrans-BrownPart 92279Element 6337336 or 6245235×1
Trans-Clear
1 piece
Windscreen 8 x 4 x 2 with 4 Studs and HandleTrans-ClearPart 92579Element 4597715×1
Minifigures
4 figures
Batman, Black Suit, Black Cape and Cowl, Yellow Batman Logo (56630 Cape) (3626b Head)Minifigure, checked as a whole figure×1
The JokerMinifigure, checked as a whole figure×1
The Joker's HenchmanMinifigure, checked as a whole figure×1
Batman, Black Suit, Black Cape and Cowl, Yellow Batman Logo (56630 Cape) (3626b Head), 55704 CowlMinifigure, 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.