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.

Build to Learn

Checking

5004933 Build to Learn

41 pieces in 15 part and color combinations.

LEGO counts 53 pieces. This inventory comes from a separate parts catalog and lists 41; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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

White 14 pieces

  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×5
  • Brick 1 x 3 White Part 3622 Element 6550143 or 362201 ×5
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×1
  • Brick Arch 1 x 6 x 2 Curved Top White Part 6183 Element 6552159 or 6132772 ×1
  • Panel 1 x 4 x 1 with Rounded Corners [Thin Wall] White Part 15207 Element 6552215 or 6514504 ×1
  • Plate 6 x 6 White Part 3958 Element 6552116 or 4144012 ×1

Lime 5 pieces

  • Brick 1 x 1 Lime Part 3005 Element 4220634 or 4122446 ×5

Medium Azure 5 pieces

  • Brick 1 x 1 Medium Azure Part 3005 Element 6603285 or 4619652 ×5

Orange 5 pieces

  • Brick 1 x 1 Orange Part 3005 Element 4173805 or 4119645 ×5

Red 5 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×5

Yellow 4 pieces

  • Brick 1 x 2 with Eyes, Freckles and Smile Print Yellow Part 3004pr0001 Element 4569078 ×1
  • Brick Curved 2 x 3 Yellow Part 6215 Element 621524 ×1
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×2

Light Bluish Gray 2 pieces

  • Plate 2 x 10 Light Bluish Gray Part 3832 Element 4211462 ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 5004933-1 [No Color/Any Color] Part stickerupn0100 ×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.