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.
251 pieces in 110 part and color combinations, plus 2 minifigures.
The official piece count includes the 8 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.
Equipment Medical SyringeLimePart 87989Element 6086765 or 46545831 spare in the box×2
Equipment Tranquilizer Gun with Top ClipPearl TitaniumPart 99809Element 4654423×1
Technic Bushes
8 pieces
Technic BushRedPart 3713Element 6271820 or 42271551 spare in the box×4
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedYellowPart 32123bElement 6271167 or 32123241 spare in the box×4
Technic Pins
8 pieces
Technic Pin with Friction Ridges Lengthwise and Center SlotsBlackPart 2780Element 4121715 or 278026×1
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×3
Technic Pin Long with Friction Ridges Lengthwise, 2 Center SlotsBluePart 6558Element 4514553×1
Technic Axle TowballLight Bluish GrayPart 2736Element 6443149 or 4211375×1
Technic Pin 1/2 with 2L Bar ExtensionLight Bluish GrayPart 61184Element 6347715 or 4520320×2
Wheels and Tyres
8 pieces
Tyre 43.2 x 26 Balloon SmallBlackPart 61481Element 4518826×4
Wheel 30.4 x 20 without Pinholes, with Reinforced RimLight Bluish GrayPart 56145Element 4297210×4
Animal / Creature Body Parts
7 pieces
Animal Body Part, Dinosaur, Raptor / Dilophosaurus Lower Jaw with Tan Teeth PrintOlive GreenPart 37407pr0001Element 6112514 or 6018263×1
Animal Body Part, Dinosaur, Raptor Arm / Leg, Left, Tan Claws PrintOlive GreenPart 98068pr0001Element 6044774 or 6018266×1
Animal Body Part, Dinosaur, Raptor Arm / Leg, Right, Tan Claws PrintOlive GreenPart 98069pr0001Element 6044777 or 6018271×1
Animal Body Part, Dinosaur, Raptor Body with Dark Green Top with Lime Stripes PrintOlive GreenPart 98165pr0001Element 6018257 or 4656237×1
Animal Body Part, Dinosaur, Raptor Head with Tan Teeth and Dark Green and Lime Stripes PrintOlive GreenPart 98065pr0001Element 6018260 or 4656243×1
Animal Body Part, Dinosaur, Raptor Leg, Left, with Pin, Tan Claws and Lime Stripes over Dark Green PrintOlive GreenPart 98071pr0001Element 6018274 or 4656265×1
Animal Body Part, Dinosaur, Raptor Leg, Right, with Pin, Tan Claws and Lime Stripes over Dark Green PrintOlive GreenPart 98072pr0001Element 6018286 or 4656269×1
Technic Bricks
7 pieces
Technic Brick 1 x 2 [1 Pin Hole]BluePart 3700Element 370023×4
Technic Brick 1 x 1 with Pin HoleDark Bluish GrayPart 6541Element 4210639×1
Technic Axle and Pin Connector Angled #5 - 112.5°YellowPart 32015Element 4521998 or 4107068×1
Tiles Round and Curved
2 pieces
Tile Round 1 x 1Trans-RedPart 98138Element 6514189 or 62586071 spare in the box×2
Bricks Wedged
1 piece
Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 StudsYellowPart 52031Element 4263142×1
Containers
1 piece
Container Box 2 x 2 x 2 - Top OpeningReddish BrownPart 61780Element 4520638×1
Stickers
1 piece
Sticker Sheet for Set 5884-1[No Color/Any Color]Part 74415Element 4656728×1
String, Bands and Reels
1 piece
String with End Studs 11L OverallBlackPart 14226c11Element 6096955 or 60375581 spare in the box×1
Supports, Girders and Cranes
1 piece
Support 1 x 1 x 5 1/3 Spiral Staircase AxleBlackPart 40244Element 4155558×1
Technic Beams Special
1 piece
Technic Pin Connector Double with Bar [2 Holes]BlackPart 85940Element 6173124 or 4562148×1
Windscreens and Fuselage
1 piece
Windscreen 2 x 6 x 2, Wide TopTrans-ClearPart 4176Element 4502193 or 4179426×1
Minifigures
2 figures
Hero with Ammo BeltMinifigure, checked as a whole figure×1
Hero with FedoraMinifigure, 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.