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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.
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7 pieces in 7 part and color combinations, plus 4 minifigures.
The official piece count includes the 18 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.
Equipment Wand [Individual]
Reddish Brown ×1
Dark Brown ×1
Reddish Brown is redder and lighter than Dark Brown.
LEGO's request form asks for the set number (5005254) and each piece's element ID, both listed above.
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Equipment Brush / Broom
×1
Equipment Wand [Individual]
Also in Dark Brown
×1
Equipment Wand [Individual]
Also in Reddish Brown
×1
Bag / Handbag / Purse Angular with Zipper [Plain]
×1
Equipment Wand [Individual]
×1
Equipment Bottle / Erlenmeyer Flask with Trans-Bright Green Fluid Pattern
×1
Equipment Cup / Teacup
×1
Horace Slughorn
×1
Madame Hooch, Light Nougat Hands
×1
Professor Dolores Umbridge, Dark Pink Outfit with Bright Pink Cardigan
×1
Professor Snape Boggart, Black Hat
×1
Tick each piece as you find it, or mark it missing.
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.
Request a replacement from LEGOMark 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.
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.
