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.
LEGO counts 146 pieces. This inventory comes from a separate parts catalog and lists 152; 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.
Duplo Figure Bob / Pageboy Hair Reddish Brown, with Dark Purple Legs, Wrap Top with Necklace, Nougat HandsLight LilacPart 75121pr0001×1
Duplo Figure Child with Pigtails Reddish Brown, with Red Top Under Blue Overalls with Yellow Flower in Pocket, Blue LegsRedPart 47510pr0004Element 4651113×1
Duplo Figure with Parted Wavy Hair Reddish Brown, with Dark Blue Legs, Sand Green Top with 4 Buttons, and Blue EyesSand GreenPart 75115pr0025×1
Duplo Figure Child with Cap Lime, with White Shirt under Blue Coveralls with worms in Pocket - Blue LegsWhitePart 47511pr0001Element 6233829 or 4651115×1
Gear Parts
2 pieces
Storage Bin, Dacta, Large (new style)BluePart 54189×1
Storage Bin Lid, Dacta [For New Style Trays]Trans-ClearPart 54190×1
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.