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.
Technic Beam 1 x 2 with Axle on SideBlackPart 7244Element 6542617×12
Transportation - Land
7 pieces
Steering Wheel with 4 Studs on CenterDark GreenPart 67811Element 6329283×7
Tiles Special
6 pieces
Tile Special Round 2 x 2 with HoleOrangePart 15535Element 6147052×6
Minifig Headwear Accessories
5 pieces
Headwear Accessory Crown Long with BarWhitePart 25516Element 65948482 spares in the box×5
Bricks Round and Cones
4 pieces
Cone 1 x 1 Inverted with Bar at Bottom (Ice Cream Cone)Bright GreenPart 11610Element 6538447 or 6331087×3
Cone 1 x 1 [Top Groove]TanPart 59900Element 4529237×1
Animal / Creature Body Parts
2 pieces
Animal Body Part, Horn (Cattle) / Tentacle / Vine / Branch / Tongue - LongBright GreenPart 13564Element 64988021 spare in the box×2
Bricks Special
2 pieces
Brick Special 1 x 1 Studs on 4 SidesLimePart 4733Element 6174006 or 4212458×2
Technic Beams
2 pieces
Technic Beam 1 x 7 ThickReddish BrownPart 32524Element 6179614 or 4211277×2
Technic Panels
2 pieces
Technic Panel 3 x 5 with Wall Mount HoleBlackPart 67139Element 6302094×2
Windscreens and Fuselage
2 pieces
Windscreen 8 x 6 x 2 CurvedDark GreenPart 41751Element 6392976 or 4612732×2
Minifig Accessories
1 piece
Food Egg with 1.5mm Hole [Plain]Yellowish GreenPart 24946Element 6398468×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
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.