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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.

Basic Building Set in Cardboard

Checking

050 Basic Building Set in Cardboard

290 pieces in 47 part and color combinations.

LEGO counts 287 pieces. This inventory comes from a separate parts catalog and lists 290; 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.

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

Red 114 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×4
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×10
  • Brick 1 x 8 Red Part 3008 Element 300821 ×3
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×3
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×15
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×10
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×50
  • Door 1 x 2 x 3 Left with Hollow Studs, Fixed Glass Red Part 32bc01 ×1
  • Door 1 x 2 x 3 Right, Hollow Studs, Fixed Glass Red Part 33bc01 ×1
  • Wheel Old with 4 Studs Red Part 7039 Element 7039 ×4
  • Window 1 x 2 x 2 Classic, Extended Lip, Hollow Studs [with Glass] Red Part 3081bc01 ×2
  • Window 1 x 4 x 2 Classic with Long Sill [Complete] Red Part 453bc01 ×5
  • Window 1 x 6 x 2 [Old Style Extended Lip & Glass] Red Part 645bc01 ×3
  • Window 1 x 6 x 3 Panorama with Glass and Hollow Studs Red Part 604c01 ×3

White 90 pieces

  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×4
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×10
  • Brick 2 x 10 White Part 3006 Element 4617855 or 300601 ×2
  • Brick 2 x 2 without Inside Ridges White Part 3003a Also in Trans-Clear ×10
  • Brick 2 x 3 without Cross Supports White Part 3002a Also in Trans-Clear ×10
  • Brick 2 x 4 without Cross Supports White Part 3001a Also in Trans-Clear ×40
  • Brick 2 x 8 White Part 3007 Element 6619309 or 6033776 ×1
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Black Inside White Part 7049bc03 ×2
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×5
  • Plate 4 x 8 White Part 3035 Element 6609533 or 303501 ×4
  • Plate 6 x 8 White Part 3036 Element 303651 or 303601 ×2

Blue 30 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×2
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×4
  • Brick 2 x 10 Blue Part 3006 Element 4615600 or 300623 ×2
  • Brick 2 x 2 without Inside Ridges Blue Part 3003a ×8
  • Brick 2 x 3 without Cross Supports Blue Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Blue Part 3001a ×10
  • Brick 2 x 8 Blue Part 3007 Element 6037384 or 300723 ×2

Yellow 20 pieces

  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×3
  • Brick 1 x 2 without Bottom Tube Yellow Part 3065 ×3
  • Brick 2 x 2 without Inside Ridges Yellow Part 3003a ×7
  • Brick 2 x 3 without Cross Supports Yellow Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Yellow Part 3001a ×5

Black 16 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×6
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×4
  • Brick 2 x 3 without Cross Supports Black Part 3002a ×3
  • Brick 2 x 4 without Cross Supports Black Part 3001a ×3

Trans-Clear 14 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2
  • Brick 2 x 2 without Inside Ridges Trans-Clear Part 3003a Also in White ×4
  • Brick 2 x 3 without Cross Supports Trans-Clear Part 3002a Also in White ×4
  • Brick 2 x 4 without Cross Supports Trans-Clear Part 3001a Also in White ×4

Light Gray 6 pieces

  • Brick 10 x 20 without Bottom Tubes, with '+' Cross Support (early Baseplate) Light Gray Part 700b ×2
  • Tyre Smooth Old Style - Small Light Gray Part 132a ×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.

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