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.
LEGO counts 23 pieces. This inventory comes from a separate parts catalog and lists 24; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
Before you call it missing
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
Animal / Creature Body Part, Neck / Tail, S Curve with PinSand BluePart 40396Element 4153769×1
Animal / Creature Body Part, Tail / Neck, Base Section with Black PinSand BluePart 40395Element 4152998×1
Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End SectionSand BluePart 40379Element 4174997 or 4152978×2
Animal Body Part / Plant, Tail / Neck / Branch / Trunk, Middle Section with Pin, Round Pin HoleSand BluePart 40378Element 4152976×1
Animal Body Part, Dinosaur, Head, SmallSand BluePart 40384Element 4175028 or 4152981×1
Animal Body Part, Dinosaur, Legs Long, Dark Gray and Red PrintSand BluePart 40382c01pr0002Element 4155791×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex / Spinosaurus Lower Jaw, with PinSand BluePart 40390Element 4152989×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Head with Dark Gray and Red PrintSand BluePart 30459pr0002Element 4153916×1
Light Gray
4 pieces
Animal Body Part, Dinosaur Body Quarter with Pin Holes, Dark Gray Streaked/Sand Blue/Black Streaked/Red Spotted PrintLight GrayPart 40373pr0002Element 4155795×2
Animal Body Part, Dinosaur Body Quarter with Pin Holes, Dark Gray Streaked/Sand Blue/Black Streaked/Red Spotted PrintLight GrayPart 40374pr0002Element 4155797×2
Dark Gray
3 pieces
Animal Body Part, Dinosaur, Back Sail 8 x 2 x 5Dark GrayPart 40385Element 4153771×1
Brick Sloped 45° 2 x 2Dark GrayPart 3039Element 4109984×2
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.