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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 Mech

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76140 Iron Man Mech

144 pieces in 58 part and color combinations, plus 1 minifigure.

The official piece count includes the 4 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

Red 42 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Red Part 99780 Element 6089698 ×4
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Red Part 47457 Element 4220515 ×2
  • Brick Curved Inverted 2 x 1 Red Part 24201 Element 6186398 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 with Iron Man Chest with Blue Reactor Print Red Part 85984pr0016 Element 6288573 ×1
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Red Part 4871 Element 487121 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 2 spares in the box ×4
  • Plate Special 1 x 2 Rounded with 2 Open Studs Red Part 35480 Element 6210269 ×6
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Red Part 60470b Element 6360036 or 4556153 ×1
  • Plate Special 2 x 2 with 2 Pin Holes Red Part 2817 Element 281721 ×1
  • Plate Special, 2 x 2 Studs and Handle, Closed Ends (Mech Chest Plate / Armor) Red Part 27167 Element 6525960 or 6288458 ×1
  • Technic Axle and Pin Connector Angled #1 Red Part 32013 Element 6332580 or 4254606 ×1
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×3
  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 1 spare in the box ×2
  • Tile Round 1 x 1 Quarter Red Part 25269 Element 6170390 1 spare in the box ×2
  • Tile Special 2 x 2 Corner with Cut Corner - Facet Red Part 27263 Element 6217194 ×4
  • Tile Special 2 x 2 Inverted Red Part 11203 Element 6013868 ×3
  • Wedge Plate 2 x 2 Left Red Part 24299 Element 6141552 ×1
  • Wedge Plate 2 x 2 Right Red Part 24307 Element 6141553 ×1

Dark Red 30 pieces

  • Arm Mechanical with Clip [Thick Support] Dark Red Part 98313 Element 6276866 or 6006738 ×8
  • Bracket 1 x 2 - 2 x 2 Dark Red Part 44728 Element 6267486 ×2
  • Brick Curved 2 x 2 x 2/3 Dark Red Part 15068 Element 6107758 ×4
  • Brick Curved 4 x 1 Double, No Studs Dark Red Part 93273 Element 6000752 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Red Part 85984 Element 6083977 ×3
  • Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no stud Dark Red Part 28192 Element 6267498 ×2
  • Plate 1 x 1 Dark Red Part 3024 Element 4539114 or 4183901 1 spare in the box ×2
  • Plate 1 x 2 Dark Red Part 3023 Element 4539097 or 4162582 ×5
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Dark Red Part 2654 Element 6192839 ×2

Dark Bluish Gray 27 pieces

  • Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×2
  • Bracket 1 x 1 - 1 x 1 Inverted Dark Bluish Gray Part 36840 Element 6225494 ×2
  • Bracket 1 x 2 - 1 x 2 Dark Bluish Gray Part 99781 Element 6214341 ×4
  • Bracket 2 x 2 with 1 x 2 Vertical Studs Dark Bluish Gray Part 41682 Element 6250018 ×2
  • Launcher 4 x 2 x 1 with Bottom Axle Dark Bluish Gray Part 41812 Element 6266747 ×1
  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Bluish Gray Part 2540 Element 4210660 ×2
  • Plate Special 1 x 2 with 5.9mm Centre Side Towball Dark Bluish Gray Part 14417 Element 6414560 or 6338160 ×4
  • Plate Special 1 x 2 with 5.9mm Towball Socket and Towball Dark Bluish Gray Part 14419 Element 6414554 or 6338166 ×4
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Dark Bluish Gray Part 18674 Element 6115080 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×1
  • Technic Steering Gear with 3 Towball Joints, Compact Dark Bluish Gray Part 15460 Element 6359227 or 6055629 ×1

Light Bluish Gray 12 pieces

  • Bracket 1 x 1 - 1 x 1 Light Bluish Gray Part 36841 Element 6248078 or 6227012 ×2
  • Plate Special 1 x 2 5.9mm Centre Side Towball Socket Light Bluish Gray Part 14704 Element 6414561 or 6338165 ×2
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×6
  • Plate Special 2 x 2 with Wheel Holders Light Bluish Gray Part 4600 Element 4211504 ×2

Trans-Light Blue 12 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Light Blue Part 4740 Element 6580378 or 6245307 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Light Blue Part 2654 Element 6581775 or 6171733 ×2
  • Tile Round 1 x 1 Trans-Light Blue Part 98138 Element 6514192 or 6274739 1 spare in the box ×6
  • Wave / Power Blast Rounded Energy with Bar Handle Trans-Light Blue Part 27393 Element 6581317 or 6353237 ×2

Pearl Gold 11 pieces

  • Cone 1 x 1 [Top Groove] Pearl Gold Part 59900 Element 4529247 ×2
  • Tile Round 2 x 2 with Bottom Stud Holder Pearl Gold Part 14769 Element 6066345 ×2
  • Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] Pearl Gold Part 99563 Element 6207933 or 4651407 ×7

Black 4 pieces

  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, without Groove Black Part 44567b Element 6266244 ×1
  • Panel 1 x 2 x 1 with Rounded Corners and Central Divider Black Part 93095 Element 6640376 or 6115086 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×2

Dark Tan 3 pieces

  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Dark Tan Part 15672 Element 6093064 ×2
  • Plate 2 x 4 Dark Tan Part 3020 Element 4497077 or 4267874 ×1

Blue 2 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 76140-1 [No Color/Any Color] Part 66611 Element 6288577 ×1

Minifigures 1 figure

  • Iron Man Mark 43 Armor, Visor Printed on Helmet 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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