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.
852 pieces in 262 part and color combinations, plus 8 minifigures.
The official piece count includes the 77 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.
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 12Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate 2 x 2Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 2 x 6Black ×3Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Technic Pin 1/2 with Anti-StudBright GreenPart 65826Element 63012841 spare in the box×2
Dark Blue
2 pieces
Panel 1 x 3 x 1Dark BluePart 23950Element 6489004×2
Dark Tan
2 pieces
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×2
Trans-Light Blue
2 pieces
Plate Round 1 x 1 with Open StudTrans-Light BluePart 85861Element 6510163 or 62835901 spare in the box×2
Trans-Orange
2 pieces
Tile Round 1 x 1 Half CircleTrans-OrangePart 24246Element 6507959 or 62491161 spare in the box×2
Trans-Red
2 pieces
Tile Round 1 x 1 Half CircleTrans-RedPart 24246Element 6507960 or 62640331 spare in the box×2
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 71499-1[No Color/Any Color]Part 10112130Element 6535444×1
Minifigures
8 figures
Cooper, Red CapMinifigure, checked as a whole figure×1
D-ShockMinifigure, checked as a whole figure×1
Mateo, Trans-Bright Green CapeMinifigure, checked as a whole figure×1
OneMinifigure, checked as a whole figure×1
Mr. Oz, White Torso, Pearl Titanium LegsMinifigure, checked as a whole figure×1
Albert, Dark Blue Spacesuit with AirtanksMinifigure, checked as a whole figure×1
Cyber Brain Spider, Magenta AppendagesMinifigure, checked as a whole figure×1
Cyber Brain Spider, Medium Azure Appendages. 4 LegsMinifigure, 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.