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.
1,358 pieces in 266 part and color combinations, plus 1 minifigure.
The official piece count includes the 5 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 1 x 1Trans-Brown ×1Dark Bluish Gray ×3Trans-Brown is see-through: hold the piece up to a light.
Bracket 1 x 2 - 1 x 2 InvertedBlack ×1Dark Bluish Gray ×17Black is darker than Dark Bluish Gray.
Arm Mechanical with Clip [Thick Support]Pearl TitaniumPart 98313Element 6276869 or 6008484×2
Tile Special 1 x 2 with HandlePearl TitaniumPart 2432Element 6158368×3
Metallic Silver
3 pieces
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateMetallic SilverPart 61409Element 6546109 or 6092115×3
Bright Pink
2 pieces
Plate 2 x 2Bright PinkPart 3022Element 6096589 or 4245314×2
Reddish Brown
2 pieces
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×2
Trans-Yellow
2 pieces
Plate 1 x 1Trans-YellowPart 3024Element 6513966 or 62520451 spare in the box×2
White
2 pieces
Brick Round 2 x 2 with Axle HoleWhitePart 3941Element 6601920 or 614351×1
Rubber Belt Small [15mm ID] [Round Cross Section]WhitePart 85543Element 6699001 or 4580665×1
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Trans-Brown
1 piece
Plate 1 x 1Trans-BrownPart 3024Element 6513960 or 62520391 spare in the boxAlso in Dark Bluish Gray×1
Trans-Clear
1 piece
Light Brick 2 x 3 x 1 1/3 with Dark Bluish Gray Base [Yellow LED]Trans-ClearPart 62930Element 6555880 or 6429472×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 76105-1[No Color/Any Color]Part 38385Element 6224451×1
Minifigures
1 figure
Iron Man Mark 43 Armor, Plain Trans-Clear HeadMinifigure, 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.