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

41923 Monster

34 pieces in 10 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

Tiles Round and Curved 20 pieces

  • Tile Round 1 x 1 Blue Part 98138 Element 6284575 or 6009460 1 spare in the box ×4
  • Tile Round 1 x 1 Quarter Bright Light Yellow Part 25269 Element 6554798 or 6228969 1 spare in the box ×4
  • Tile Round 1 x 1 Quarter Dark Azure Part 25269 Element 6199887 1 spare in the box ×4
  • Tile Round 1 x 1 Red Part 98138 Element 6284574 or 6063445 1 spare in the box ×4
  • Tile Round 1 x 1 Quarter Yellow Part 25269 Element 6195183 1 spare in the box ×4

Tiles 12 pieces

  • Tile 1 x 1 with Pink Monster, Dark Azure Horns Print Bright Pink Part 3070bpr0253 Element 6345184 1 spare in the box ×3
  • Tile 1 x 1 with Light Aqua/Bright Pink Fur Print Light Aqua Part 3070bpr0254 Element 6345185 1 spare in the box ×6
  • Tile 1 x 1 with Pink Monster, Bright Light Orange Horns Print Light Aqua Part 3070bpr0255 Element 6345186 1 spare in the box ×3

Tools 2 pieces

  • DOTS Bracelet 1 Stud Wide Light Aqua Part 67196 Element 6308510 ×1
  • DOTS Bracelet 1 Stud Wide Medium Azure Part 67196 Element 6330592 ×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.