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.
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedLight Bluish GrayPart 32123bElement 6271165 or 42115731 spare in the box×2
Orange
2 pieces
Large Figure Shoulder Cover, Armor, Round, Smooth [Plain]OrangePart 21560Element 6121443×2
Dark Tan
1 piece
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×1
Flat Silver
1 piece
Weapon Sword / Foil / ÉpéeFlat SilverPart 93550Element 6222063 or 46182701 spare in the box×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.