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.

Supplementary Wagon

Checking

2937 Supplementary Wagon

10 pieces in 9 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

Yellow 4 pieces

  • Duplo Brick 1 x 2 x 2 with Winner Ribbon Print Yellow Part 4066pr9996 Element 4129967 ×1
  • Duplo Brick 2 x 2 Yellow Part 3437 Element 4583546 or 343724 ×1
  • Duplo Train Base 4 x 8 with Red Wheels, and Moveable Hook Yellow Part 31300c01 Element 4129946 ×1
  • Duplo Train Compartment/Container Frame Yellow Part 31301 Element 4129951 ×1

Red 3 pieces

  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×1
  • Duplo Car with Yellow Wheels and '1' Print Red Part 31363c02pr0006 ×1
  • Duplo Figure, Early, Helmet White, Red Legs, Black Zipper and '1' Print Red Part 75729pr0017 ×1

Green 2 pieces

  • Duplo Brick 2 x 2 Green Part 3437 Element 6528078 or 4583552 ×2

Blue 1 piece

  • Duplo Train Freight Container with 'RALLY' Print Blue Part 31304pr0003 Element 4129966 ×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.