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LEGO Missing Piece Checker

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.

Iron Man vs. Loki

Checking

10721 Iron Man vs. Loki

56 pieces in 33 part and color combinations, plus 2 minifigures.

The official piece count includes the 10 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.

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Piece checklist

Bars, Ladders and Fences 9 pieces

  • Bar 1 x 6 [Closed Studs] Light Bluish Gray Part 6140 Element 6415608 or 4211524 ×1
  • Bar 4L (Lightsaber Blade / Wand) Trans-Light Blue Part 30374 Element 6507882 or 6170187 ×2
  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Light Blue Part 58176 Element 6507870 or 6171877 ×2
  • Bar 4L (Lightsaber Blade / Wand) Trans-Red Part 30374 Element 6507880 or 6167284 ×4

Plates Special 8 pieces

  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Pearl Gold Part 48336 Element 4585493 ×2
  • Plate Special 1 x 2 with Clip Horizontal on Side White Part 11476 Element 6313115 or 6070712 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) White Part 87580 Element 6550157 or 6126046 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Yellow Part 87580 Element 6126050 or 4565386 ×1

Wheels and Tyres 8 pieces

  • Tyre 21 x 12 with Offset Tread Small Wide and Center Band Black Part 87697 Element 6575727 or 4568644 ×4
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin White Part 6014b Element 4170457 ×4

Tiles Special 7 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Dark Red Part 2412b Element 4541506 or 4528969 ×3
  • Tile Special 1 x 2 Grille with Bottom Groove Flat Silver Part 2412b Element 4619636 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Pearl Gold Part 2412b Element 4490599 ×2

Bricks 5 pieces

  • Brick 2 x 4 Black Part 3001 Element 300126 ×2
  • Brick 2 x 2 Dark Bluish Gray Part 3003 Element 4211060 ×2
  • Brick 1 x 1 Trans-Dark Blue Part 3005 Element 6514215 or 6494117 ×1

Bricks Sloped 5 pieces

  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Dark Bluish Gray Part 4871 Element 4211076 ×1
  • Brick Sloped 45° 2 x 2 Dark Red Part 3039 Element 4609925 or 4162216 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×2

Bricks Curved 4 pieces

  • Brick Curved 3 x 1 No Studs Pearl Gold Part 50950 Element 6501318 or 4585621 ×2
  • Brick Curved 4 x 1 Double, No Studs Red Part 93273 Element 4633914 ×1
  • Brick Curved 2 x 2 with Lip, No Studs Trans-Light Blue Part 30602 Element 6171718 or 6064345 ×1

Transportation - Land 3 pieces

  • Vehicle Base 4 x 10 x 2 1/2 with Mudguards, Wheel Pins and 6 x 2 Centre Recess with 3 Holes, Red Wheel Holders Red Part 12622c01 Element 6441349 or 6411943 ×1
  • Seat / Chair 2 x 2 with Center Sprue Mark White Part 4079b Element 407901 ×1
  • Steering Stand 1 x 2 with Black Steering Wheel White Part 3829c01 Element 4208543 or 9551 ×1

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 with Axle Hole Trans-Light Blue Part 3941 Element 6514282 or 6273153 ×1

Bricks Wedged 1 piece

  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs with Iron Man Armor and Round Arc Reactor Print Dark Red Part 45677pr0003 Element 6135213 ×1

Minifig Shields, Weapons, & Tools 1 piece

  • Weapon Staff with Forked End (Pharaoh) Pearl Gold Part 93252 Element 4610762 ×1

Plates 1 piece

  • Plate 4 x 6 Black Part 3032 Element 303226 ×1

Plates Wedged 1 piece

  • Wedge Plate 2 x 4 Red Part 51739 Element 6023770 ×1

Rock 1 piece

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Dark Blue Part 30153 Element 6513973 or 6247793 ×1

Tiles 1 piece

  • Tile 1 x 4 with Iron Man Mask and Gold 'STARK' Print Dark Red Part 2431pr0079 Element 6135223 ×1

Minifigures 2 figures

  • Loki, Dark Bluish Gray Outfit Minifigure, checked as a whole figure ×1
  • Iron Man Mark 7 Armor, No Red Panels Minifigure, 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.

Request a replacement from LEGO

Buy the piece

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.

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