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 Building Set

Checking

1964 Basic Building Set

27 pieces in 15 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 7 pieces

  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×4
  • Brick 2 x 3 Blue Part 3002 Element 300223 ×2
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×1

Yellow 7 pieces

  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×3
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×2
  • Door 1 x 4 x 5 Yellow Part 4131 Element 4521099 ×1
  • Window 2 x 4 x 3 Pane Yellow Part 4133 Element 4113170 or 4101806 ×1

Red 6 pieces

  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick 2 x 4 Red Part 3001 Element 300121 ×2
  • Door Frame 2 x 4 x 5 Red Part 4130 ×1
  • Window 2 x 4 x 3 Frame with Solid Studs Red Part 4132 Element 413221 ×1

White 6 pieces

  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×2
  • Brick 2 x 3 White Part 3002 Element 6550133 or 300251 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×2

Green 1 piece

  • Brick 4 x 12 Green Part 4202 Element 4537561 or 4250511 ×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.