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.

Big Bricks Box

Checking

5213 Big Bricks Box

140 pieces in 16 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

Blue 35 pieces

  • Duplo Brick 2 x 2 Blue Part 3437 Element 343723 ×9
  • Duplo Brick 2 x 4 Blue Part 3011 Element 4290075 or 301123 ×23
  • Duplo Brick 2 x 6 Blue Part 2300 Element 4290388 or 230023 ×2
  • Duplo Brick 2 x 8 Blue Part 4199 Element 4291881 or 419923 ×1

Green 35 pieces

  • Duplo Brick 2 x 2 Green Part 3437 Element 6528078 or 4583552 ×9
  • Duplo Brick 2 x 4 Green Part 3011 Element 4290071 or 301128 ×23
  • Duplo Brick 2 x 6 Green Part 2300 Element 4295265 or 230028 ×2
  • Duplo Brick 2 x 8 Green Part 4199 Element 4291886 or 419928 ×1

Red 35 pieces

  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×9
  • Duplo Brick 2 x 4 Red Part 3011 Element 4583326 or 4290074 ×23
  • Duplo Brick 2 x 6 Red Part 2300 Element 4290387 or 230021 ×2
  • Duplo Brick 2 x 8 Red Part 4199 Element 4291879 or 419921 ×1

Yellow 35 pieces

  • Duplo Brick 2 x 2 Yellow Part 3437 Element 4583546 or 343724 ×9
  • Duplo Brick 2 x 4 Yellow Part 3011 Element 4290060 or 301124 ×23
  • Duplo Brick 2 x 6 Yellow Part 2300 Element 4290389 or 230024 ×2
  • Duplo Brick 2 x 8 Yellow Part 4199 Element 4291883 or 419924 ×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.