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.
200 pieces in 86 part and color combinations, plus 4 minifigures.
The official piece count includes the 28 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.
Plant / Creature Body Part, Vine / Tail / Tentacle / Bionicle Spine, SpikyDark RedPart 55236Element 4541488 or 4294145×4
Glow In Dark Trans
4 pieces
Plant / Creature Body Part, Vine / Tail / Tentacle / Bionicle Spine, SpikyGlow In Dark TransPart 55236Element 4578512 or 4500078×4
Trans-Orange
4 pieces
Projectile, Large Figure Weapon, Zamor Sphere / BallTrans-OrangePart 54821Element 4297030×4
Blue
3 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×3
Trans-Yellow
3 pieces
Projectile, Large Figure Weapon, Ammo, SquidTrans-YellowPart 57555×3
Trans-Brown
2 pieces
Windscreen 12 x 6 x 6 CurvedTrans-BrownPart 41881Element 4288366 or 4163184×1
Windscreen 8 x 6 x 2 CurvedTrans-BrownPart 41751Element 4161245×1
Trans-Dark Blue
2 pieces
Technic Panel Dome 7 x 7 x 5 with Pin HolesTrans-Dark BluePart 57587Element 4502597×2
Trans-Red
2 pieces
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-RedPart 58176Element 6507867 or 61717621 spare in the box×2
Trans-Light Blue
1 piece
Dish 6 x 6 Inverted (Radar) with Hollow StudsTrans-Light BluePart 44375a×1
Trans-Neon Orange
1 piece
Dish 4 x 4 Inverted [Radar]Trans-Neon OrangePart 3960Element 6133841 or 4506604×1
Minifigures
4 figures
Barraki KalmahMinifigure, checked as a whole figure×1
Toa Mahri HewkiiMinifigure, checked as a whole figure×1
Barraki TakadoxMinifigure, checked as a whole figure×1
Barraki Mantax with Pearl Dark Gray TorsoMinifigure, 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.