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 Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]RedPart 32054Element 4140806 or 4125198×1
Black
13 pieces
Large Figure Limb Cover, Size 5, Armor with Ball Joint Socket with Fire and Silver Double Lightning Bolt Print (Nitroblast)BlackPart 90639pr0008Element 4632652×1
Large Figure Skeletal, Limb with 2 Ball Joints, Ball Socket and Four HolesBlackPart 90613Element 4593558×1
Large Figure Skeletal, Limb with Ball Joint and Ball Socket, ShortBlackPart 90612Element 4593557×1
Large Figure Skeletal, Limb with Ball Joint on Axle and Ball SocketBlackPart 90607Element 4593553×2
Large Figure Skeletal, Limb, 5L with Ball Joint on Axle and Ball SocketBlackPart 90609Element 4593555×2
Large Figure Torso Cover, Armour with 2 Chest Holes and Ball Joint SocketBlackPart 90652Element 4632595×1
Technic Axle Connector 2 x 3 with Ball Socket, Open Lower Axle HolesBlackPart 93571Element 4610948×3
Technic Axle Connector Smooth [with x Hole + Orientation]BlackPart 59443Element 6084612 or 4512363×1
Technic Pin Double with Axle HoleBlackPart 32138Element 4130597 or 4119589×1
Pearl Titanium
11 pieces
Large Figure Armor / Shield CapPearl TitaniumPart 92216Element 4609763×1
Large Figure Limb Cover, Size 3, Armor with Ball Joint SocketPearl TitaniumPart 90641Element 6171062 or 4632613×1
Large Figure Limb Cover, Size 5, Armor with Ball Joint SocketPearl TitaniumPart 90639Element 4632641 or 4609760×4
Large Figure Torso Cover, Armour with 2 Chest Holes and Ball Joint SocketPearl TitaniumPart 90652Element 4632593×1
Large Figure Skeletal, Limb with 2 Ball Joints, and Ball SocketLight Bluish GrayPart 90617Element 4616176×1
Technic Axle Connector Hub with 3 Axles at 120°Light Bluish GrayPart 57585Element 4502595×1
Blue
1 piece
Technic Pin 1/2 without Friction RidgesBluePart 4274Element 41430051 spare in the box×1
Dark Bluish Gray
1 piece
Technic Axle 4 with StopDark Bluish GrayPart 87083Element 6083620 or 4560177×1
Trans-Bright Green
1 piece
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-Bright GreenPart 58176Element 6507869 or 6171864×1
Trans-Neon Orange
1 piece
Large Figure Accessory, Container / BucketTrans-Neon OrangePart 87826×1
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.