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.
827 pieces in 242 part and color combinations, plus 5 minifigures.
LEGO counts 844 pieces. This inventory comes from a separate parts catalog and lists 851, including the 24 parts inside the minifigures; 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.
Brick 1 x 2Medium AzurePart 3004Element 6603336 or 6092674×1
Metallic Gold
1 piece
Dish 3 x 3 Inverted [Radar]Metallic GoldPart 43898Element 6189071 or 6010442×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 80043-1[No Color/Any Color]Part 10101437Element 6420197×1
Minifigures
5 figures
Mei Power UpMinifigure, checked as a whole figure×1
Yellow Tusk ElephantMinifigure, checked as a whole figure×1
Ink DemonMinifigure, checked as a whole figure×1
Ink GeneralMinifigure, checked as a whole figure×1
Pigsy, Blue OutfitMinifigure, checked as a whole figure×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.