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.
447 pieces in 154 part and color combinations, plus 2 minifigures.
The official piece count includes the 8 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.
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle HoleBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side]Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Tile Special 2 x 2 Corner with Cut Corner - FacetBlackPart 27263Element 6166859×2
Tile Special 2 x 2 InvertedWhitePart 11203Element 6564913 or 6013866×1
Flags, Banners and Signs
2 pieces
Flag 2 x 2 Trapezoid with Flat Area between ClipsWhitePart 44676Element 6023099 or 4507191×2
Large Buildable Figures
2 pieces
Large Figure Brick 2 x 4 with Heavily Curved Ends, Shoulder Pad Design with Two Studs on the OutsideLight Bluish GrayPart 49523Element 6254171×2
Technic Bricks
2 pieces
Technic Brick 1 x 2 [1 Pin Hole]BlackPart 3700Element 370026×1
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom PinLight Bluish GrayPart 32064aElement 6206249 or 4233493×1
Minifig Headwear
1 piece
Helmet with 5 SpikesFlat SilverPart 49484Element 6254168×1
Panels
1 piece
Panel 1 x 2 x 1 [Rounded Corners]Trans-GreenPart 4865bElement 6254879×1
Stickers
1 piece
Sticker Sheet for Set 75973-1[No Color/Any Color]Part 49108Element 6252106×1
Technic Bushes
1 piece
Technic BushRedPart 3713Element 6271820 or 42271551 spare in the box×1
Technic Gears
1 piece
Technic Tread Sprocket Wheel Small 6 ToothBlackPart 57520Element 4662228 or 4544527×1
Wheels and Tyres
1 piece
Wheel Hard Plastic, Treaded with 7 Pin Holes (37mm D. x 22mm)Pearl TitaniumPart 22410Element 6122170×1
Windscreens and Fuselage
1 piece
Windscreen 6 x 2 x 2 with HandleTrans-GreenPart 92474Element 6254880×1
Minifigures
2 figures
ReinhardtMinifigure, checked as a whole figure×1
D.VaMinifigure, 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.