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.
357 pieces in 126 part and color combinations, plus 6 minifigures.
LEGO counts 401 pieces. This inventory comes from a separate parts catalog and lists 399, including the 42 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Plate 2 x 4Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThickBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Tile 1 x 4 with GrooveBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm]BlackPart 4623Element 4597267 or 462326×2
Plate Special 1 x 2 Side Handle [Free Ends]Light Bluish GrayPart 2540Element 4211632×2
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)Light Bluish GrayPart 3794a×4
Technic Panels
8 pieces
Technic Panel Fairing #20 Large Long, Small Hole, Side ABlackPart 44350Element 4296202×1
Technic Panel Fairing #21 Large Long, Small Hole, Side BBlackPart 44351Element 4296203×1
Technic Panel Fairing #22 Large Short, Small Hole, Side ABlackPart 44352Element 4296204×1
Technic Panel Fairing #23 Large Short, Small Hole, Side BBlackPart 44353Element 4296205×1
Technic Panel Fairing # 5 Small Short, Large Hole, Side ARedPart 32527Element 4143152×2
Technic Panel Fairing # 6 Small Short, Large Hole, Side BRedPart 32528Element 4143150×2
Bars, Ladders and Fences
7 pieces
Lever Small Base with Black LeverLight Bluish GrayPart 298c02Element 42217751 spare in the box×1
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-RedPart 58176Element 6507867 or 61717622 spares in the box×6
Technic Beams
7 pieces
Technic Beam 1 x 5 ThickBlackPart 32316Element 4142135 or 4140429Also in Dark Bluish Gray×2
Technic Beam 1 x 7 ThickBlackPart 32524Element 4495935 or 4155458×4
Technic Beam 1 x 5 ThickDark Bluish GrayPart 32316Element 32316199 or 4210686Also in Black×1
Bricks Special
6 pieces
Brick Special 1 x 2 with 2 Pins, Round Pin HolesDark Bluish GrayPart 30526Element 4210697×5
Brick Special 1 x 2 with PinLight Bluish GrayPart 2458Element 4211364×1
Tiles
5 pieces
Tile 1 x 4 with GrooveBlackPart 2431Element 243126Also in Dark Bluish Gray×2
Tile 1 x 2 with GrooveDark Bluish GrayPart 3069bElement 4211052×2
Tile 1 x 4 with GrooveDark Bluish GrayPart 2431Element 4211053Also in Black×1
Minifig Upper Body
4 pieces
Arm Mechanical with Clip [Thin Support]BlackPart 53989Element 4623154 or 4294996×2
Arm Mechanical with Clip [Thin Support]Dark RedPart 53989Element 4626928 or 4541552×2
Bricks Wedged
3 pieces
Brick Wedged, Curved 8 x 3 x 2 Open LeftBlackPart 41750Element 6271277 or 6185621×1
Brick Wedged, Curved 8 x 3 x 2 Open RightBlackPart 41749Element 6271278 or 6185619×1
Brick Wedged, Curved Inverted 10 x 6 x 2 CockpitBlackPart 47406Element 4209683×1
Tiles Special
2 pieces
Tile Special 2 x 2 with Top PinDark Bluish GrayPart 2460Element 4211129×2
Tubes and Hoses
2 pieces
Hose, Ribbed 7mm D. 6L / 4.8cmPearl Light GrayPart 78c06Element 4495202 or 4143468×1
Flexible Ribbed Hose 8mm Ends 19LRedPart 57539Element 6055410 or 4609780×1
Windscreens and Fuselage
2 pieces
Windscreen 8 x 6 x 2 CurvedBlackPart 41751Element 6115083 or 4506636×1
Windscreen 8 x 4 x 2 Curved [2 Dual-Fingered Click Hinges]Trans-RedPart 46413Element 6435790 or 4508599×1
Plates Wedged
1 piece
Wedge Plate 4 x 6 Cut CornersBlackPart 32059Element 4129572×1
Minifigures
6 figures
Toa Mahri JallerMinifigure, checked as a whole figure×1
Toa Mahri NuparuMinifigure, checked as a whole figure×1
Barraki EhlekMinifigure, checked as a whole figure×1
Barraki Pridak with Pearl Dark Gray TorsoMinifigure, checked as a whole figure×1
Barraki TakadoxMinifigure, checked as a whole figure×1
Toa MahriMinifigure, 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.