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.
691 pieces in 237 part and color combinations, plus 3 minifigures.
The official piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. 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.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Plate 1 x 2Black ×13Dark Bluish Gray ×11Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×1Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Plate 1 x 8Black ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 Rounded with 2 Open StudsBlack ×16Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Tile 1 x 4 with GrooveBlack ×4Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 Side Handle [Free Ends]WhitePart 2540Element 4140583 or 254051×1
Plate Special 1 x 4 Rounded with 2 Open StudsWhitePart 77845Element 6548295 or 6501816×1
Tan
9 pieces
Brick 2 x 2TanPart 3003Element 4114306 or 300305×1
Brick Special 1 x 4 with 4 Studs on One SideTanPart 30414Element 4201062 or 4177990×8
Sand Blue
6 pieces
Animal Body Part, Dinosaur, Fin with Black PinSand BluePart 116314c01Element 6593193×4
Animal Body Part, Dinosaur, Mosasaurus Body with Dark Blue Markings, Light Aqua Belly PrintSand BluePart 116313pr0001Element 6600574×1
Animal Body Part, Dinosaur, Mosasaurus Tail with Dark Blue Markings PrintSand BluePart 119083pr0001Element 6600576×1
Trans-Orange
5 pieces
Cone 1 x 1 [Top Groove]Trans-OrangePart 59900Element 6514017 or 6172233×2
Plate Round 1 x 1 with Solid StudTrans-OrangePart 6141Element 6514059 or 6240227×3
Blue
4 pieces
Technic Pin Long with Friction Ridges Lengthwise, 1 Center SlotBluePart 42924Element 6299413×4
Trans-Bright Green
4 pieces
Cone 1 x 1 [Top Groove]Trans-Bright GreenPart 59900Element 6514024 or 6337628×1
Plate Round 1 x 1 with Solid StudTrans-Bright GreenPart 6141Element 6514053 or 6240206×3
Trans-Red
4 pieces
Cone 1 x 1 [Top Groove]Trans-RedPart 59900Element 6514021 or 6337596×1
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 6208450×3
Flat Silver
2 pieces
Tile Round 1 x 1 with Black Dot, Circle of Small Black Dots PrintFlat SilverPart 98138pr0443Element 6551965×2
Light Aqua
1 piece
Animal Body Part, Dinosaur, Mosasaurus Lower Jaw, Tan Teeth PrintLight AquaPart 7988pr0001Element 6600575×1
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Reddish Brown
1 piece
Seat / Chair 2 x 2Reddish BrownPart 4079Element 4211206×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 77983-1[No Color/Any Color]Part 10117038Element 6600581×1
Minifigures
3 figures
Zora Bennett, HatMinifigure, checked as a whole figure×1
Duncan Kincaid, Dark Geren BeretMinifigure, checked as a whole figure×1
Dr. Henry LoomisMinifigure, checked as a whole figure×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.