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 Thick with Pin Hole and Axle HoleBlackPart 60483Element 6265091 or 6006140×6
Technic Beam 1 x 3 ThinRedPart 6632Element 6364451 or 4107824×1
Bricks Curved
4 pieces
Brick Curved 2 x 2 x 2/3 with 2 Purple Squares PrintBlackPart 15068pr0022Element 6195345×1
Brick Curved 2 x 2 x 2/3 with Red and White Circles PrintBlackPart 15068pr0021Element 6195344×1
Brick Curved 4 x 1 Double, No StudsBlackPart 93273Element 4613153×2
Plates Special
4 pieces
Plate Special 1 x 2 with Handle on End [Closed Ends]BlackPart 60478Element 4515368×1
Plate Special 1 x 2 with Pin Hole UnderneathBlackPart 18677Element 6192309 or 6167497×2
Plate Special 2 x 4 with 2 Pin HolesBlackPart 26599Element 6194233×1
Plates
3 pieces
Plate 1 x 1BlackPart 3024Element 3024261 spare in the box×2
Plate 2 x 2BlackPart 3022Element 302226×1
Projectiles / Launchers
3 pieces
Launcher, Brick Special 1 x 4 Spring Shooter with Light Bluish Gray TopDark Bluish GrayPart 15400Element 6324200 or 6048898×1
Projectile, Spring Shooter Ammunition 8L BarTrans-RedPart 15303Element 6287550 or 6054526×2
Bricks Sloped
1 piece
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateBlackPart 61409Element 4541191×1
Technic Beams Special
1 piece
Technic Beam 1 x 3 with Ball Joint in MiddleDark Bluish GrayPart 98577Element 6001085×1
Technic Bushes
1 piece
Technic BushRedPart 3713Element 6271820 or 42271551 spare in the box×1
Technic Special
1 piece
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]BlackPart 41669Element 4540065 or 4177441×1
Tiles
1 piece
Tile 1 x 3RedPart 63864Element 4533742×1
Tiles Special
1 piece
Tile Special 1 x 1 with Clip with Rounded EdgesRedPart 15712Element 6348058 or 6072998×1
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.