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, Limb, with Ball Joint, and Gear with Axle Hole (Toa Hordika)Dark Bluish GrayPart 50921Element 4520589×2
Large Figure Limb Cover (Toa Inika)Pearl GoldPart 53543Element 4292607×3
Large Figure Mask Ignika (Toa Ignika)Pearl GoldPart 60936Element 4556178×1
Large Figure Weapon Spiked Ball, Thornax Fruit with Black BandPearl GoldPart 64277c01Element 4546585×1
Large Figure Armor Panel / ShieldPearl Light GrayPart 61805Element 4526633×1
Large Figure Shield 5 x 5 with 7 FinsPearl Light GrayPart 45274Element 4299157 or 4187591×1
Large Figure Weapon Claw, Mistika BitilPearl Light GrayPart 61799Element 4525710×2
Large Figure Weapon Sword, Power Sword (Jaller Mahri)Pearl Light GrayPart 57572Element 4497147×1
Large Figure Head Connector Block Eye/Brain Stalk - ShortTrans-Neon GreenPart 57536Element 4505191×1
Large Figure Armor Panel / ShieldYellowPart 61805Element 4537405×4
Large Figure Weapon Claw, Barraki Mantax PincerYellowPart 57565Element 4522705×2
Hinges, Arms and Turntables
16 pieces
Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On EndsBlackPart 30552Element 4158848×8
Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 TeethBlackPart 30553Element 4143372×2
Hinge Cylinder 1 x 3 Locking with 1 Finger and 2 Fingers On Ends, without Hole, 9 TeethBlackPart 30554a×6
Technic Special
16 pieces
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×10
Technic CamBlackPart 6575Element 4143187×2
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Pearl Light GrayPart 41669Element 4284480 or 4177440×4
Technic Bushes
12 pieces
Technic BushLight Bluish GrayPart 3713Element 6275844 or 6271817×2
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedLight Bluish GrayPart 32123bElement 6271165 or 4211573×10
Technic Beams Special
10 pieces
Technic Beam 1 x 2 with Ball Joint Straight, Smooth BallBlackPart 64276Element 4560108 or 4537514×2
Technic Beam 1 x 2 with Ball Joint AngledDark Bluish GrayPart 50923Element 4503381 or 4289258×2
Technic Beam 1 x 7 with FanDark Bluish GrayPart 32177Element 4545238 or 4211136×6
Projectiles / Launchers
2 pieces
Launcher, Large Figure Weapon, Zamor Sphere Launcher, with Hole and Axle HolePearl Light GrayPart 64275Element 4546416×2
Technic Gears
2 pieces
Technic Tread Sprocket Wheel Small with Glatorian Game PrintPearl Light GrayPart 57520pr0001Element 4646781 or 4544529×2
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.