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.
746 pieces in 148 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.
Technic Pin 1/2 with FrictionDark Bluish GrayPart 89678Element 63956351 spare in the box×6
Bright Pink
5 pieces
Plant, Flower with 5 Pointed Petals and PinBright PinkPart 18853Element 60969901 spare in the box×5
Dark Blue
5 pieces
Plate Round 1 x 1 with Solid StudDark BluePart 6141Element 6021623 or 41841121 spare in the box×4
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Dark BluePart 18674Element 6253885×1
Red
5 pieces
Plate 1 x 2RedPart 3023Element 302321×5
Pearl Gold
4 pieces
Tile Special Round 1 x 1 with Hollow BarPearl GoldPart 20482Element 6186672 or 61261131 spare in the box×4
Blue
2 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×2
Lime
1 piece
Brick 2 x 6LimePart 2456Element 6422924 or 4271447×1
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Reddish Brown
1 piece
Equipment Wand [Individual]Reddish BrownPart 36752a1 spare in the box×1
Yellow
1 piece
Technic Axle 9YellowPart 60485Element 6130010×1
Minifigures
2 figures
Harry Potter, Dark Blue Jacket Dirty, Medium Legs, Printed ArmsMinifigure, checked as a whole figure×1
Remus Lupin, Dark Bluish Gray Jacket ButtonedMinifigure, 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.