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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.

Legoland California 10th Birthday Cupcake Box (LLCA Ambassador Pass Exclusive)

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LLCA51 Legoland California 10th Birthday Cupcake Box (LLCA Ambassador Pass Exclusive)

92 pieces in 26 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

White 39 pieces

  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×2
  • Brick 2 x 6 White Part 2456 Element 6552122 or 4249698 ×2
  • Brick Sloped 45° 2 x 2 White Part 3039 Element 6552103 or 303901 ×8
  • Brick Sloped 45° 2 x 2 Double Convex White Part 3045 Element 4233370 or 304501 ×4
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×8
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×4
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×1
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×2
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×4

Yellow 38 pieces

  • Brick Sloped 75° 2 x 2 x 3 Double Convex Yellow Part 3685 Element 4271194 or 4189057 ×4
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Yellow Part 3684 Element 4248062 or 4189348 ×8
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×6
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×4
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×2
  • Plate 2 x 8 Yellow Part 3034 Element 303424 ×2
  • Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 Also in Trans-Yellow ×4
  • Tile 1 x 4 with Groove Yellow Part 2431 Element 243124 ×2
  • Tile 1 x 6 with Groove Yellow Part 6636 Element 6388488 or 663624 ×2
  • Tile 1 x 8 with Groove Yellow Part 4162 Element 6388482 or 4189400 ×4

Blue 7 pieces

  • Brick Round 1 x 1 Open Stud Blue Part 3062b Element 306223 ×3
  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 ×4

Red 5 pieces

  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 ×5

Trans-Yellow 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 Also in Yellow ×2

Trans-Orange 1 piece

  • Cone 1 x 1 [No Top Groove] Trans-Orange Part 4589 Element 4221195 ×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.

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