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.
371 pieces in 156 part and color combinations, plus 1 minifigure.
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.
Plate 3 x 3 CornerBlack ×2Dark Blue ×2Black is yellower and darker than Dark Blue.
Plate 1 x 5Black ×1Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Wedge Plate 2 x 4Dark Bluish GrayPart 51739Element 4527082×2
Wedge Plate 2 x 2 Cut CornerDark TanPart 26601Element 6228921×2
Wedge Plate 3 x 2 LeftDark TanPart 43723Element 6002843×1
Wedge Plate 3 x 2 RightDark TanPart 43722Element 6002847×1
Wedge Plate 2 x 4RedPart 51739Element 6023770×1
Wedge Plate 3 x 2 LeftRedPart 43723Element 4372321 or 4180533×1
Wedge Plate 3 x 2 RightRedPart 43722Element 4372221 or 4180504×1
Bricks Wedged
15 pieces
Brick Wedged, Curved 1 x 4 with Stud Notch LeftDark BluePart 5415Element 6558908 or 6536143×1
Brick Wedged, Curved 1 x 4 with Stud Notch RightDark BluePart 5414Element 6558853 or 6536142×1
Brick Wedged, Curved 3 x 2 with Stud Notch LeftDark BluePart 80177Element 6470066×1
Brick Wedged, Curved 3 x 2 with Stud Notch RightDark BluePart 80178Element 6470085×1
Brick Wedged, Curved 1 x 2 x 2/3 No Studs, Wing EndPearl GoldPart 47458Element 6375715 or 6114676×2
Brick Wedged, Curved 2 x 1 with Stud Notch LeftRedPart 29120Element 6177505×1
Brick Wedged, Curved 2 x 1 with Stud Notch RightRedPart 29119Element 6177507×1
Brick Wedged, Curved 2 x 2 with Stud Notch LeftRedPart 5095Element 6507845 or 6477762×1
Brick Wedged, Curved 2 x 2 with Stud Notch Left with Dark Red Webs PrintRedPart 5095pr0004Element 6559211×1
Brick Wedged, Curved 2 x 2 with Stud Notch RightRedPart 5093Element 6513907 or 6477758×1
Brick Wedged, Curved 2 x 2 with Stud Notch Right with Dark Red Webs PrintRedPart 5093pr0004Element 6559210×1
Brick Wedged, Curved 2 x 2 with Stud NotchesRedPart 66956Element 6305047×2
Brick Wedged, Curved 4 x 3 No Studs [Plain]RedPart 64225Element 6215396 or 4651527×1
Technic Pins
12 pieces
Technic Pin with Friction Ridges Lengthwise with No Center SlotsBlackPart 61332Element 62798751 spare in the box×4
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×4
Technic Pin 1/2 with FrictionDark Bluish GrayPart 89678Element 63956351 spare in the box×4
Bars, Ladders and Fences
8 pieces
Bar, Angled with 1 x 1 Round Plate / Stud on EndBlackPart 65578Element 6510193 or 64434161 spare in the box×2
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]Dark Bluish GrayPart 3484Element 6439040×2
Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip]Pearl GoldPart 3484Element 6453281×4
Technic Connectors
8 pieces
Technic Pin Connector Round [Slotted]Pearl GoldPart 62462Element 6390147 or 6245500×8
Tiles
5 pieces
Tile 2 x 6 with 'LEGO MARVEL', 'IRON SPIDER-MAN' PrintBlackPart 69729pr0055Element 6545013×1
Tile 1 x 1 with GrooveRedPart 3070bElement 3070211 spare in the box×4
Technic Bricks
4 pieces
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom PinDark RedPart 32064aElement 6206250 or 4539059×2
Technic Brick 1 x 2 [1 Pin Hole]RedPart 3700Element 370021×2
Large Buildable Figures
2 pieces
Large Figure Limb Cover / Claw / Spike Large with AxlePearl GoldPart 15362Element 6542432 or 6300599×2
Panels
2 pieces
Panel 1 x 2 x 1 [Rounded Corners]BlackPart 4865bElement 6146220×2
Technic Special
2 pieces
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×1
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm HolesRedPart 67696Element 6406930×1
Technic Axles
1 piece
Technic Axle 3 with StopReddish BrownPart 24316Element 6135494×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
1 figure
Iron Spider-Man, Plain Legs, 3171 ClawsMinifigure, 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.