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.
Duplo Plate 2 x 4Reddish BrownPart 40666Element 4251777×2
Bright Light Orange
1 piece
Duplo Car SeatBright Light OrangePart 5927Element 6523041×1
Dark Orange
1 piece
Duplo Food French Bread Loaves with Short Side ExtensionsDark OrangePart 13247Element 6464792 or 6045935×1
Light Aqua
1 piece
Duplo Kettle with Ribbed Handles 2 x 2 x 1.5Light AquaPart 5729Element 6523008×1
Light Bluish Gray
1 piece
Duplo Shower FaucetLight Bluish GrayPart 15327Element 6464406 or 6432328×1
Lime
1 piece
Duplo Drawer 2 x 2 with Pull HandleLimePart 4891Element 6588963×1
Orange
1 piece
Duplo Figure with Thick Hair Combed Forward and Beard Dark Orange, Orange Shirt, Dark Bluish Grey LegsOrangePart 35516c01pr0204Element 6590834×1
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.