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.
730 pieces in 246 part and color combinations, plus 8 minifigures.
LEGO counts 744 pieces. This inventory comes from a separate parts catalog and lists 766, including the 36 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.
Equipment Wand [Individual]Reddish Brown ×1Dark Brown ×2Reddish Brown is redder and lighter than Dark Brown.
Brick 1 x 2Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Brick 1 x 4Black ×2Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Plate 1 x 3Black ×2Dark Bluish Gray ×10Black is darker than Dark Bluish Gray.
Plate 2 x 2Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudBlack ×4Dark Bluish Gray ×12Black is darker than Dark Bluish Gray.
3 more look-alike pairs
Plate Special 1 x 2 Rounded with 2 Open StudsBlack ×3Dark Bluish Gray ×10Black is darker than Dark Bluish Gray.
Plate Special 1 x 4 with 2 Studs with Groove [New Underside]Black ×8Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Pin without Friction Ridges LengthwiseLight Bluish GrayPart 3673Element 4211807 or 36731941 spare in the box×2
Technic Pin 1/2 without Friction RidgesWhitePart 4274Element 6552190 or 63880181 spare in the box×4
Wheels and Tyres
5 pieces
Wheel Skateboard / TrolleyBlackPart 2496Element 6223673 or 4569104×1
Wheel Wagon Large (33mm D.), hole notched for wheels holder pinReddish BrownPart 4489bElement 4211279×2
Wheel Wheelchair with Pin Hole, Fixed Black Hard Rubber Tire PatternTrans-ClearPart 80441pat0001Element 6503251 or 64007731 spare in the box×2
Containers
2 pieces
Box / Crate 1 x 3Dark BrownPart 69066Element 6310366×1
Box / Crate with Handholds 3 x 4 x 1 2/3Medium NougatPart 30150Element 6035734×1
Flags, Banners and Signs
2 pieces
Road Sign Round on PoleBlackPart 13459Element 6314886 or 6070733×1
Road Sign Clip-on 2 x 2 RoundWhitePart 30261Element 6317571 or 4116816×1
Minifig Heads
2 pieces
Minifig Head [Plain] [Vented Stud - 2 Holes]WhitePart 28621Element 6550193 or 6454713×2
Minifig Headwear
2 pieces
Top HatBlackPart 3878Element 4569092 or 4105175×1
Hat / Flat Cap, Old StyleDark GreenPart 2514Element 6454462×1
Minifig Neckwear
2 pieces
Neckwear Cape, Straight Bottom, One Top Hole [Spongy Stretchable Fabric]GreenPart 37046Element 6422327 or 6305112×1
Neckwear Cape, Straight Bottom, One Top Hole [Spongy Stretchable Fabric]RedPart 37046Element 6305110×1
Bricks Wedged
1 piece
Brick Wedged, Curved 2 x 1 with Stud Notch LeftBright Light OrangePart 29120Element 6289747×1
Stickers
1 piece
Sticker Sheet for Set 76439-1-1[No Color/Any Color]Part 10108496Element 6485887×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
8 figures
Harry Potter, Sand Blue Shirt, Short Dark Tan Legs, ExcitedMinifigure, checked as a whole figure×1
Madam MalkinMinifigure, checked as a whole figure×1
WitchMinifigure, checked as a whole figure×1
WizardMinifigure, checked as a whole figure×1
Mannequin with ScarfMinifigure, checked as a whole figure×1
MannequinMinifigure, checked as a whole figure×1
Garrick Ollivander, Dark Brown JacketMinifigure, checked as a whole figure×1
Padma Patil, Dark Green JacketMinifigure, 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.