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.
1,292 pieces in 292 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.
Hinge Brick 1 x 2 BaseBlack ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 10Black ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 2 x 3Black ×2Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Plate 2 x 6Black ×4Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Tile Special Round 1 x 1 with Hollow BarBlack ×6Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Axle 4RedPart 3705Element 6129995 or 4265797×2
Technic Axle 3YellowPart 4519Element 6130007×2
Bars, Ladders and Fences
8 pieces
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]BlackPart 3484Element 6439039×2
Bar 3LBlackPart 87994Element 6185316 or 60935251 spare in the box×2
Bar, Curved U-Shape 2 x 3BlackPart 7052Element 6535446×2
Bar Holder with Hole and Bar HandleDark RedPart 23443Element 6337283 or 6253169×2
Minifig Upper Body
4 pieces
Arm Mechanical with 2 Clips [Battle Droid]Dark Bluish GrayPart 30377Element 6319332 or 42109001 spare in the box×4
Technic Beams Special
4 pieces
Technic Beam 1 x 2 with Ball Joint Holes in BallBlackPart 67697Element 6338171×4
Windscreens and Fuselage
4 pieces
Windscreen 2 x 4 Half DomeDark RedPart 81911Element 6595737×2
Windscreen 3 x 6 x 1 Curved with Rectangular Stud Holder in BottomDark RedPart 35299Element 6598892 or 6423978×2
Technic Connectors
2 pieces
Technic Axle and Pin Connector Angled #3 - 157.5°BlackPart 32016Element 6261386 or 4107082×1
Technic Axle and Pin Connector Angled #5 - 112.5°BlackPart 32015Element 6271346 or 4107084×1
Panels
1 piece
Panel 1 x 2 x 2 [Side Supports / Hollow Studs]BlackPart 87552Element 4593678×1
Technic Gears
1 piece
Technic Driving Ring Extension, 8 RidgesLight Bluish GrayPart 35186Element 6307931×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
1 figure
Iron Man Mark 3 Armor, SunglassesMinifigure, 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.