BlockTalk Find Your Set

Free tool

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.

Monster

Checking

40104 Monster

36 pieces in 20 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.

Show

Piece checklist

Reddish Brown 18 pieces

  • Brick 1 x 1 Reddish Brown Part 3005 Element 4211242 ×2
  • Brick 1 x 3 Reddish Brown Part 3622 Element 4245312 or 4211220 ×1
  • Brick 2 x 3 Reddish Brown Part 3002 Element 4216668 ×3
  • Plate 1 x 1 Reddish Brown Part 3024 Element 4221744 1 spare in the box ×1
  • Plate 1 x 3 Reddish Brown Part 3623 Element 4211152 ×3
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×2
  • Plate 2 x 2 Reddish Brown Part 3022 Element 4613975 or 4216695 ×1
  • Plate 2 x 3 Reddish Brown Part 3021 Element 4211189 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Reddish Brown Part 15573 Element 6092590 ×2
  • Tile 1 x 1 with Groove Reddish Brown Part 3070b Element 4211288 1 spare in the box ×2

Lime 6 pieces

  • Brick 1 x 1 Lime Part 3005 Element 4220634 or 4122446 ×2
  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×2
  • Brick Special 1 x 1 with Stud on 1 Side Lime Part 87087 Element 6073026 or 4566860 ×2

Blue 5 pieces

  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×4
  • Brick 2 x 3 Blue Part 3002 Element 300223 ×1

Black 4 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×1
  • Brick 1 x 3 Black Part 3622 Element 362226 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1

Metallic Silver 2 pieces

  • Plate Round 1 x 1 with Solid Stud Metallic Silver Part 6141 Element 51809301 or 6546105 1 spare in the box ×2

Dark Bluish Gray 1 piece

  • Plate 4 x 4 Dark Bluish Gray Part 3031 Element 4243831 or 4211089 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy