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.
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 No Studs [Stud Holder with Symmetric Ridges]Dark Turquoise ×6Medium Azure ×8Dark Turquoise is darker than Medium Azure.
Wedge Plate 3 x 2 LeftBlackPart 43723Element 4180536×1
Wedge Plate 3 x 2 RightBlackPart 43722Element 4180508×1
Tiles
2 pieces
Tile 1 x 6 with GrooveDark TurquoisePart 6636Element 6264986×2
Pneumatics
1 piece
Pneumatic Hose Connector with Axle ConnectorDark BrownPart 99021Element 6265670 or 6167942×1
Technic Beams
1 piece
Technic Beam 1 x 3 ThickWhitePart 32523Element 6632140 or 4208160×1
Tiles Special
1 piece
Tile Special Round 2 x 2 with HoleGreenPart 15535Element 6074954×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
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.