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.

Basic Bricks - Medium

Checking

5575 Basic Bricks - Medium

45 pieces in 11 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 13 pieces

  • Duplo Brick 2 x 2 Blue Part 3437 Element 343723 ×6
  • Duplo Brick 2 x 4 Blue Part 3011 Element 4290075 or 301123 ×4
  • Duplo Brick 2 x 6 Blue Part 2300 Element 4290388 or 230023 ×1
  • Duplo Plate 2 x 4 Blue Part 40666 Element 4170804 ×2

Yellow 12 pieces

  • Duplo Brick 1 x 2 x 2 Yellow Part 4066 Element 4519295 or 4519293 ×2
  • Duplo Brick 2 x 2 Yellow Part 3437 Element 4583546 or 343724 ×6
  • Duplo Brick 2 x 4 Yellow Part 3011 Element 4290060 or 301124 ×4

Bright Green 10 pieces

  • Duplo Brick 2 x 2 Bright Green Part 3437 Element 4583789 or 4168579 ×6
  • Duplo Brick 2 x 4 Bright Green Part 3011 Element 4513084 or 4290085 ×4

Red 10 pieces

  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×6
  • Duplo Brick 2 x 4 Red Part 3011 Element 4583326 or 4290074 ×4

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.