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.
Plate Round 1 x 1 with Solid StudTrans-OrangePart 6141Element 6514059 or 6240227×2
Bright Light Yellow
2 pieces
Plant, Flower, Plate Round 1 x 1 with 5 PetalsBright Light YellowPart 24866Element 6426463×2
Dark Purple
2 pieces
Brick Wedged, Sloped 4 x 4 with Diamond Spikes with White Underside PatternDark PurplePart 67931pat0001Element 6509076×1
Tile 2 x 2 with Rot and Barcode Print (Sticker)Dark PurplePart 3068bpr9375Element 6503652×1
Medium Azure
2 pieces
Plate 1 x 2Medium AzurePart 3023Element 6603337 or 6097419×2
Dark Orange
1 piece
Tile 2 x 2 with Coin and Barcode Print (Sticker)Dark OrangePart 3068bpr9469Element 6407673×1
Trans-Clear
1 piece
Tile Special Round 1 x 1 with Hollow BarTrans-ClearPart 20482Element 6507895 or 6186867×1
Yellowish Green
1 piece
Brick 1 x 1 x 5 with Solid StudYellowish GreenPart 2453bElement 6478829 or 6253340×1
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.