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.
563 pieces in 200 part and color combinations, plus 10 minifigures.
The official piece count includes the 58 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.
Brick Curved 2 x 2 x 2/3Black ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Brick Wedged, Curved 2 x 1 with Stud Notch LeftBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Brick Wedged, Curved 2 x 1 with Stud Notch RightBlack ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Black ×6Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Round Corner 4 x 4Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Weapon Sword (Uruk-hai)Pearl TitaniumPart 10050Element 6264145 or 6002758×2
Trans-Dark Pink
2 pieces
Flame / Headwear Accessory Plume / Feather, Triple PointTrans-Dark PinkPart 64647Element 63032231 spare in the box×2
Light Nougat
1 piece
Minifig Head, Dark Brown Eyebrows, Open Mouth Smile / Raised Eyebrows, Open Mouth PrintLight NougatPart 3626cpr2264Element 6192037×1
Opal Trans-Light Blue
1 piece
Weapon Sword, Blade with Bar, Double EdgeOpal Trans-Light BluePart 23860Element 6530803×1
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Tan
1 piece
Plate 2 x 6TanPart 3795Element 4113993 or 379505×1
Trans-Purple
1 piece
Cone 1 x 1 [Top Groove]Trans-PurplePart 59900Element 6514023 or 6337603×1
Trans-Red
1 piece
Tile Round 1 x 1Trans-RedPart 98138Element 6514189 or 62586071 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 76323-1[No Color/Any Color]Part 10112841Element 6541373×1
Minifigures
10 figures
ChitauriMinifigure, checked as a whole figure×1
Captain AmericaMinifigure, checked as a whole figure×1
Doctor Strange, Plastic Cape, High MedallionMinifigure, checked as a whole figure×1
Thanos, Big Fig Head, Angry (Big Fig)Minifigure, checked as a whole figure×1
Falcon, Neck Bracket, Printed LegsMinifigure, checked as a whole figure×1
Black PantherMinifigure, checked as a whole figure×1
Scarlet WitchMinifigure, checked as a whole figure×1
Iron Spider-Man, Plain Legs, 53451 ClawsMinifigure, checked as a whole figure×1
Iron Man Mark 85 Armor, Pearl Gold Arms, Angular HelmetMinifigure, checked as a whole figure×1
Ant-ManMinifigure, 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.