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.
Tile Special Round 1 x 1 with Hollow BarBright GreenPart 20482Element 64006491 spare in the box×3
Dark Azure
6 pieces
Plate 2 x 2Dark AzurePart 3022Element 6206809 or 6088656×4
Plate Round Corner 4 x 4Dark AzurePart 30565Element 6227474×2
Dark Purple
6 pieces
Plate Round 1 x 1 with Solid StudDark PurplePart 6141Element 45665221 spare in the box×4
Tile Round 1 x 1 Half CircleDark PurplePart 24246Element 63135581 spare in the box×2
Medium Azure
6 pieces
Plate 2 x 3Medium AzurePart 3021Element 6604733 or 6013828×2
Plate 4 x 4Medium AzurePart 3031Element 6141594×2
Plate Round Corner 3 x 3Medium AzurePart 30357Element 6264993×2
Trans-Light Blue
6 pieces
Plate 1 x 2Trans-Light BluePart 3023Element 6514007 or 6240222×6
Blue
5 pieces
Brick Special 1 x 1 with Studs on 2 SidesBluePart 47905Element 6531923 or 4213570×2
Technic Brick Special 1 x 2 with Pin Hole and 1 x 2 PlateBluePart 73109Element 6488776×1
Technic Pin Long with Friction Ridges Lengthwise, 1 Center SlotBluePart 42924Element 6299413×2
Dark Brown
5 pieces
Brick Wedged, Curved 2 x 1 with Stud Notch LeftDark BrownPart 29120Element 6258952×2
Brick Wedged, Curved 2 x 1 with Stud Notch RightDark BrownPart 29119Element 6258950×2
Plate Round 4 x 4 with Pin HoleDark BrownPart 60474Element 6005030×1
Lime
5 pieces
Bar 4L (Lightsaber Blade / Wand)LimePart 30374Element 6327442×1
Plant, Grass Stem with Bar Hole [3.2mm]LimePart 15279Element 6188696 or 6055510×2
Technic Pin Connector Round 1L [Beam]LimePart 18654Element 63027411 spare in the box×2
Dark Orange
4 pieces
Bracket 1 x 1 - 1 x 2 InvertedDark OrangePart 73825Element 6522737×4
Dark Turquoise
4 pieces
Brick Wedged, Curved 2 x 1 with Stud Notch LeftDark TurquoisePart 29120Element 6291018×2
Brick Wedged, Curved 2 x 1 with Stud Notch RightDark TurquoisePart 29119Element 6291017×2
Bright Pink
3 pieces
Tile 2 x 3Bright PinkPart 26603Element 6290982×1
Tile Round 1 x 1 QuarterBright PinkPart 25269Element 62404631 spare in the box×2
Magenta
3 pieces
Brick Round 1 x 1 Open StudMagentaPart 3062bElement 6172869×2
Plate Special 2 x 2 with Groove and Center Stud (Jumper)MagentaPart 87580Element 6250075 or 6126069×1
Dark Green
2 pieces
Plant, Plate 1 x 1 Round with 3 LeavesDark GreenPart 32607Element 6400754×2
Green
2 pieces
Plant, Leaves 6 x 5 Swordleaf with Clip [Thick Open O Clip]GreenPart 10884Element 6313099 or 6097473×2
Yellow
2 pieces
Plant, Flower, TulipYellowPart 5903Element 65003941 spare in the box×2
Orange
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.