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.
124 pieces in 60 part and color combinations, plus 2 minifigures.
The official piece count includes the 8 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.
Wheel Wagon Large (33mm D.), hole notched for wheels holder pinPearl TitaniumPart 4489bElement 6394738 or 6233803×2
Trans-Yellow
4 pieces
Cone 1 x 1 [Top Groove]Trans-YellowPart 59900Element 6514022 or 6337597×4
Tan
2 pieces
Plate 1 x 4TanPart 3710Element 4113233 or 371005×2
Trans-Light Blue
2 pieces
Wave / Power Blast Rounded Energy with Bar HandleTrans-Light BluePart 27393Element 6581317 or 6353237×2
Dark Purple
1 piece
Equipment Wand [Individual]Dark PurplePart 36752a1 spare in the box×1
Trans-Clear
1 piece
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-ClearPart 2654Element 6581772 or 6163901×1
Minifigures
2 figures
Seraphina PicqueryMinifigure, checked as a whole figure×1
Gellert GrindelwaldMinifigure, 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.