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.
Large Figure Skeletal, Limb with 2 Ball Joints, and Ball SocketBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Axle 2 NotchedRedPart 32062Element 41428651 spare in the box×1
Projectiles / Launchers
2 pieces
Projectile, Large Figure Weapon, Zamor Sphere / BallBluePart 54821Element 4570137×1
Launcher, Large Figure Weapon, Zamor Sphere Launcher, Bottom with Axle HoleFlat SilverPart 98564Element 6021669 or 4649271×1
Technic Beams
2 pieces
Technic Beam 1 x 2 ThinBlackPart 41677Element 6338428 or 4167726×2
Bars, Ladders and Fences
1 piece
Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip]BlackPart 48729bElement 6278152 or 60373471 spare in the box×1
Technic Connectors
1 piece
Technic Axle Connector 2 x 3 with Ball Socket, Open Lower Axle HolesBlackPart 93571Element 4610948×1
Technic Special
1 piece
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×1
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.