BlockTalk Find Your Set

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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.

Truck with Crane and Caterpillar Track

Checking

337-2 Truck with Crane and Caterpillar Track

92 pieces in 42 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.

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Piece checklist

Wheels and Tyres 28 pieces

  • Technic Tread Crawler Black Part 498 ×2
  • Tyre Smooth Old Style - Small Black Part 132a ×8
  • Wheel Spoked with Stud Red Part 242c01 ×12
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside White Part 7049bc01 ×5
  • Vehicle, Steering Gear 2 x 4 [Complete Assembly] White Part 799c800 ×1

Plates 21 pieces

  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×2
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×4
  • Plate 4 x 8 Light Gray Part 3035 Element 303502 ×2
  • Plate 6 x 16 Light Gray Part 3027 Element 4160991 or 302702 ×1
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×3
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate 2 x 2 Trans-Clear Part 3022 Element 4541740 or 4238011 ×2

Bricks 20 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×6
  • Brick 1 x 2 with LEGO Logo Open O White with Black Outline Print Red Part 3004pr9974 ×1
  • Brick 1 x 4 Red Part 3010 Element 301021 ×1
  • Brick 1 x 6 Red Part 3009 Element 300921 ×4
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×1
  • Brick 2 x 4 without Cross Supports Red Part 3001a ×2
  • Brick 1 x 4 Trans-Clear Part 3010 Element 4256588 or 4227529 ×1
  • Brick 1 x 6 Trans-Clear Part 3009 Element 4235131 or 4130397 ×1
  • Brick 2 x 2 without Inside Ridges Trans-Clear Part 3003a ×1
  • Brick 2 x 3 without Cross Supports Trans-Clear Part 3002a ×1

Hinges, Arms and Turntables 7 pieces

  • Hinge Plate 2 x 5 with Small Hole [Complete Assembly] Light Gray Part 3149ac01 ×3
  • Hinge Plate 2 x 5 with Small Hole [Complete Assembly] Red Part 3149ac01 ×2
  • Turntable 4 x 4 - Old Type Complete - Faceted White Part 3404ac01 ×2

Bricks Sloped 5 pieces

  • Brick Sloped 45° 2 x 1 without Bottom Pin Red Part 3040a ×1
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×3
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×1

Plates Special 3 pieces

  • Plate Special 3 x 2 with Rounded End, Hole Red Part 3176 Element 4188189 or 317621 ×1
  • Plate Special 4 x 6 with Hole Red Part 709 ×1
  • Plate Special 5 x 6 with Hole Red Part 711 ×1

Bricks Round and Cones 2 pieces

  • Brick Round 1 x 1 Solid Stud Yellow Part 3062a ×2

String, Bands and Reels 2 pieces

  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×1
  • String Reel Winch 4 x 4 x 2 with Metal Handle, Red Drum Red Part 586c01 ×1

Windows and Doors 2 pieces

  • Door 1 x 3 x 3 Left with Window and Horizontal Handle Red Part 801a ×1
  • Door 1 x 3 x 3 Right with Window and Horizontal Handle Red Part 802a ×1

Magnets and Holders 1 piece

  • Magnet Coupling, Train - Short Cylinder (6 mm) Red Part upn0272b ×1

Transportation - Land 1 piece

  • Vehicle Base 4 x 12 for Steering Gear Light Gray Part 803 ×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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