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.
Bracket 1 x 2 - 1 x 2 InvertedDark TanPart 99780Element 6250168×4
Brick Curved 1 x 2 x 1 1/3 with Curved TopDark TanPart 6091Element 6360295 or 6100644×2
Tan
6 pieces
Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 SideTanPart 22885Element 6214334×4
Plate 2 x 2 CornerTanPart 2420Element 4114077 or 242005×2
Pearl Gold
5 pieces
Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment]Pearl GoldPart 3839bElement 6337403×2
Tile Round 2 x 2 with Dark Orange Belt Buckle PrintPearl GoldPart 14769pr1270Element 6444158×1
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]Pearl GoldPart 99563Element 6207933 or 4651407×2
Yellow
3 pieces
Plate 1 x 2YellowPart 3023Element 302324×2
Technic Axle 3YellowPart 4519Element 6130007×1
Coral
1 piece
Brick 2 x 2CoralPart 3003Element 6422920×1
Light Nougat
1 piece
Brick Round 2 x 2 with Axle HoleLight NougatPart 3941Element 6357786×1
Red
1 piece
Plate 1 x 4RedPart 3710Element 371021×1
White
1 piece
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm HolesWhitePart 67696Element 6360826×1
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.