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.
303 pieces in 143 part and color combinations, plus 2 minifigures.
The official piece count includes the 7 parts inside the set's minifigures, which this inventory lists separately. 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.
Sticker Sheet for Set 43251-1[No Color/Any Color]Part 10109272Element 6491292×1
String, Bands and Reels
1 piece
Chain 6L [5 Links]BlackPart 92338Element 6328408 or 6062698×1
Minifigures
2 figures
MirabelMinifigure, checked as a whole figure×1
Antonio - Microdoll (Medium Brown)Minifigure, 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.