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.
1,237 pieces in 260 part and color combinations, plus 11 minifigures.
LEGO counts 1,290 pieces. This inventory comes from a separate parts catalog and lists 1,291, including the 54 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.
Look-alike colors in this set
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.
Brick Round 1 x 1 Open StudRed ×1Trans-Red ×1Trans-Red is see-through: hold the piece up to a light.
Plate Round 1 x 1 with Solid StudWhite ×2Trans-Clear ×4Trans-Clear is see-through: hold the piece up to a light.
Brick 1 x 2Tan ×72Dark Tan ×30Tan is lighter than Dark Tan.
Brick 1 x 6Tan ×4Dark Tan ×5Tan is lighter than Dark Tan.
Brick Arch 1 x 4Tan ×15Dark Tan ×10Tan is lighter than Dark Tan.
Brick Special 1 x 2 Palisade [aka Log]Tan ×42Dark Tan ×15Tan is lighter than Dark Tan.
7 more look-alike pairs
Brick 1 x 4Black ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Brick 2 x 3Black ×7Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 3Black ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudBlack ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)Black ×1Dark Bluish Gray ×9Black is darker than Dark Bluish Gray.
Tile Special 1 x 1 with Clip with Rounded TipsBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Animal, Cat, Kitten Crouching with Black Eyes, Dark Brown Stripes on Head, and White Muzzle PrintMedium NougatPart 6251pr0003Element 4603517×1
Metallic Gold
1 piece
Equipment Dish / Plate / Bowl 3 x 3 [Plain]Metallic GoldPart 6256Element 6051528 or 4287800×1
Trans-Neon Green
1 piece
Cone 1 x 1 [Top Groove]Trans-Neon GreenPart 59900Element 6301321 or 6172230×1
Trans-Yellow
1 piece
Brick Round 1 x 1 Open StudTrans-YellowPart 3062bElement 6514236 or 6238674×1
Yellow
1 piece
Plate Round 4 x 4 with Pin HoleYellowPart 60474Element 4515349×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 4842-1[No Color/Any Color]Part 92951Element 4598405×1
Minifigures
11 figures
Professor Filius Flitwick, Black Suit with Printed Bow TieMinifigure, checked as a whole figure×1
Harry Potter, Gryffindor Sweater with CrestMinifigure, checked as a whole figure×1
Hermione Granger, Gryffindor Sweater with CrestMinifigure, checked as a whole figure×1
Albus Dumbledore, Sand Blue OutfitMinifigure, checked as a whole figure×1
Argus FilchMinifigure, checked as a whole figure×1
Hogwarts Knight StatueMinifigure, checked as a whole figure×1
Dementor, Dark Bluish GrayMinifigure, checked as a whole figure×2
Voldemort, Black Cape (3626b Head)Minifigure, checked as a whole figure×1
Professor Minerva McGonagall, Dark Green Robes, Hat, and CapeMinifigure, checked as a whole figure×1
Professor Severus Snape, Black Vest, CapeMinifigure, 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.