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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.

Alien and Space Dog

Checking

40126 Alien and Space Dog

55 pieces in 25 part and color combinations.

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

Plates 21 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate 1 x 3 Bright Light Orange Part 3623 Element 6073042 or 4645045 ×1
  • Plate 1 x 1 Lime Part 3024 Element 4621557 or 4561480 1 spare in the box ×2
  • Plate 1 x 3 Lime Part 3623 Element 4534664 or 4271564 ×11
  • Plate 2 x 3 Orange Part 3021 Element 4125278 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2

Plates Round Curved and Dishes 10 pieces

  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×3
  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 1 spare in the box ×3

Bricks Sloped 6 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box ×1
  • Brick Sloped Inverted 45° 2 x 1 Lime Part 3665 Element 6030276 or 4164028 ×3

Bricks 5 pieces

  • Brick 2 x 2 Corner Bright Light Orange Part 2357 Element 6034175 or 6020096 ×2
  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×1
  • Brick 1 x 3 Lime Part 3622 Element 4166093 or 4122448 ×2

Bricks Special 5 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Lime Part 87087 Element 6073026 or 4566860 ×5

Bricks Curved 4 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Bright Light Orange Part 6091 Element 6374487 or 6023185 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Lime Part 11477 Element 6069006 ×2

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×2

Tiles 1 piece

  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 1 spare in the box ×1

Tiles Special 1 piece

  • Tile Special 1 x 1 with Clip with Rounded Edges Dark Bluish Gray Part 15712 Element 6344022 or 6071226 ×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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