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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.

Gear Set with Motor

Checking

800 Gear Set with Motor

120 pieces in 37 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

Bricks 48 pieces

  • Brick 2 x 4 without Cross Supports Black Part 3001a ×4
  • Brick 10 x 20 with Bottom Tubes in single row around edge, with '+' Cross Support Light Gray Part 700d ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×2
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×6
  • Brick 1 x 4 Red Part 3010 Element 301021 ×2
  • Brick 1 x 6 Red Part 3009 Element 300921 ×2
  • Brick 1 x 8 Red Part 3008 Element 300821 ×2
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×3
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×8
  • Brick 2 x 3 without Cross Supports Red Part 3002a ×2
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×14
  • Brick 2 x 4 without Cross Supports Yellow Part 3001a ×2

Plates 18 pieces

  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×8
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×6

Wheels and Tyres 12 pieces

  • Tyre Smooth Old Style - Small Black Part 132a ×4
  • Wheel Old with 4 Studs Red Part 7039 Element 7039 ×4
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside White Part 7049bc01 ×4

Technic Axles 11 pieces

  • Technic Axle Metal [Short] for Expert Builder Gears Metal Part upn0151 ×2
  • Technic Axle 12 Milky White Part 3708 ×1
  • Technic Axle 4 Milky White Part 3705 ×2
  • Technic Axle 6 Milky White Part 3706 ×4
  • Technic Axle 8 Milky White Part 3707 ×2

Technic Gears 9 pieces

  • Technic Gear 15 Large Tooth Blue Part 570 ×3
  • Technic Gear 9 Large Tooth Red Part 569 ×4
  • Technic Gear 21 Large Tooth Yellow Part 572 ×2

Technic Bushes 8 pieces

  • Technic Bush with One Flange - Type One Red Part 584 ×8

Electronics 5 pieces

  • Battery Box, 4.5V 7 x 11 x 3 Type 2 [Complete Assembly] Blue Part 468c02 ×1
  • Electric Connector, 2 Way Male Rounded Narrow Type 2 with Cross-Cut Pins Blue Part upn0167c01 ×2
  • Motor, Train, 4.5V, 4 x 12 x 3 1/3 Type 1 Blue Part 564c01 ×1
  • Wire 12V / 4.5V with Two Leads [Undetermined Length] White Part 74503 ×1

Technic Bricks 5 pieces

  • Technic Brick 2 x 4 with Top/Side/End Holes and Solid Studs Light Gray Part 3709c ×5

Hinges, Arms and Turntables 2 pieces

  • Hinge Plate 2 x 5 with Small Hole [Complete Assembly] Light Gray Part 3149ac01 ×1
  • Turntable 4 x 4 - Old Type Complete - Faceted White Part 3404ac01 ×1

Bars, Ladders and Fences 1 piece

  • Fence Gate 1 x 4 x 2 Base Red Part 3187 ×1

String, Bands and Reels 1 piece

  • String Cord Medium Thickness 50cm Black Part 7916c50 ×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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