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.

Stack-a-Mouse

Checking

2096 Stack-a-Mouse

6 pieces in 6 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

Duplo, Quatro and Primo 6 pieces

  • Primo Stacking Base Round Wavy Medium, One Top Stud Blue Part 31137 Element 4157959 or 4142258 ×1
  • Primo Stacking Base Round Wavy Small, One Top Stud Green Part 31136 Element 4155521 or 4142257 ×1
  • Primo Stacking Base Round Wavy Large, One Top Stud, Rattle with Yellow Base Red Part 31011c01 Element 4155546 or 4142261 ×1
  • Primo Stacking Head Mouse Red Part 31134 ×1
  • Primo Brick 1 x 1 with Three Red Dots and Duplo Logo Print Yellow Part 31000pr0002 Element 82405 ×1
  • Primo Stacking Base Round Wavy Smallest, One Top Stud Yellow Part 31135 Element 4155545 or 4142256 ×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.