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.
Large Figure Head Connector Block (Toa Metru)Dark Bluish GrayPart 47312Element 4278473 or 4217832×1
Large Figure Skeletal, Connector Block 1 x 3 x 2 with 2 Pins and Axle Hole (Rhotuka)Dark Bluish GrayPart 50901Element 4247658×1
Large Figure Limb Cover, Upper Leg Section (Piraka)Dark GreenPart 53566Element 4284565×4
Large Figure Skeletal, Limb, Plated with 2 Ball Joints (Piraka)Dark GreenPart 53574Element 4284580×2
Large Figure Skeletal, Limb, with 2 Ball Joints, and 3 Holes (Vahki)Dark GreenPart 47328Element 4289382 or 4227816×2
Large Figure Skeletal, Torso, Lower, with 2 Ball Joints, 2 Axle Holes, and 4 Holes (Vahki)Dark GreenPart 47330Element 4289934×1
Large Figure Chest Cover (Toa Metru)Pearl Light GrayPart 49423Element 4294799 or 4247224×3
Large Figure Limb Cover / Torso Cover (Toa Inika)Pearl Light GrayPart 53544Element 4494482 or 4292942×2
Large Figure Skeletal, Torso with 2 Ball Joints (Piraka)Pearl Light GrayPart 53564Element 4494484 or 4287936×1
Large Figure Weapon Axe, Inika Light-up Laser AxePearl Light GrayPart 55827Element 4493118 or 4294879×1
Large Figure Weapon Sword, Inika Light-up Energized Ice SwordPearl Light GrayPart 55828Element 4493119 or 4294860×1
Large Figure Weapon, Claw, Climbing Claw / Kodan Ball Half (Toa Nuva)Pearl Light GrayPart 44036Element 4535261 or 4298444×2
Large Figure Head Connector Block Eye/Brain Stalk (Piraka) - Light-UpTrans-Neon OrangePart 53500Element 4288205×1
Technic Special
13 pieces
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×2
Technic Link 1 x 16Light Bluish GrayPart 2637Element 4211556×1
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Pearl Light GrayPart 41669Element 4284480 or 4177440×10
Technic Beams
12 pieces
Technic Beam 1 x 3 ThickBlackPart 32523Element 4142822 or 3252326×6
Technic Beam 1 x 7 ThickBlackPart 32524Element 4495935 or 4155458×3
Technic Beam 1 x 9 Bent (7 - 3) ThickBlackPart 32271Element 6276835 or 4140327×2
Technic Beam 2 x 4 L-Shape ThickLight Bluish GrayPart 32140Element 6271831 or 4211610×1
Wheels and Tyres
8 pieces
Tyre 24 x 14 Shallow Tread (Tread Small Hub)BlackPart 30648Element 4524358 or 4153005×4
Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow SpokesLight Bluish GrayPart 55981Element 6109684 or 4299119×4
Animal / Creature Body Parts
4 pieces
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallPearl Light GrayPart 53451Element 4568390 or 44940861 spare in the box×4
Projectiles / Launchers
3 pieces
Large Figure Spinner / Propeller with Code, Marbled Pearl Light Gray Pattern (Rhotuka)Dark GreenPart 50899pat0001pr0001×2
Large Figure Spinner Rod 2.5L with Gear 8 Tooth (Rhotuka)YellowPart 50903Element 4263698×1
Technic Bushes
2 pieces
Technic BushLight Bluish GrayPart 3713Element 6275844 or 62718171 spare in the box×2
Tubes and Hoses
2 pieces
Hose, Ribbed 7mm D. 11L / 8.8cmPearl Light GrayPart 78c11Element 4495208 or 4141672×2
Tools
1 piece
Rip Cord, Rhotuka, 12L with Connector Block 1 x 3 x 5BlackPart 50900Element 4252442×1
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.