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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.

12V Electric Train with 2 Wagons

Checking

722-2 12V Electric Train with 2 Wagons

155 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.

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Piece checklist

Bricks 32 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×4
  • Brick 1 x 2 Black Part 3004 Element 300426 ×8
  • Brick 1 x 4 Black Part 3010 Element 301026 ×1
  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick 1 x 6 with Gold '722' Print Black Part 3009pr0063 ×2
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×2
  • Brick 2 x 3 without Cross Supports Black Part 3002a ×3
  • Brick 2 x 4 without Cross Supports Black Part 3001a ×2
  • Brick 1 x 4 Red Part 3010 Element 301021 ×8

Transportation - Land 32 pieces

  • Vehicle Track, Train, Tapered Rail Curved Inside Blue Part 3230a ×16
  • Vehicle Track, Train, Tapered Rail Curved Outside Blue Part 3229a ×16

Plates 30 pieces

  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×3
  • Plate 2 x 8 Black Part 3034 Element 303426 ×2
  • Plate 4 x 8 Black Part 3035 Element 303526 ×4
  • Plate 4 x 12 Light Gray Part 3029 Element 302902 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×16

Electronics 21 pieces

  • Brick 2 x 4, 12V with Power Pickups for Train Motor and Solid Pins Black Part 433c01 ×2
  • Motor, Train, 12V 12 x 4 x 3 1/3 Type I with Two Side Holes Black Part upn0274c02 ×1
  • Electric Connector, 2 Way Male Rounded Wide Long, Hollow Pins Blue Part upn0128c01 ×1
  • Train Track 12V Conducting Rail Curved [No Cable Connection Holes] Blue Part 3241b ×16
  • Wire with Train Track Contact Base, 97cm Blue Part 2913 ×1

Wheels and Tyres 20 pieces

  • Tyre for Train Wheel for Electric Train Motor 12V Black Part 458 ×4
  • Train Wheel Spoked for Motor Red Part upn0383a ×4
  • Train Wheel Spoked for Wagon Red Part upn0383b ×8
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside White Part 7049bc01 ×4

Magnets and Holders 6 pieces

  • Magnet Coupling, Train - Short Cylinder (6 mm) Blue Part upn0272b ×2
  • Magnet Coupling, Train - Short for 722 locomotive power pickup brick Blue Part upn0300 ×1
  • Magnet Coupling, Train - Short Cylinder (6 mm) Red Part upn0272b ×2
  • Magnet Coupling, Train - Short for 722 locomotive power pickup brick Red Part upn0300 ×1

Plates Special 5 pieces

  • Plate Special 5 x 6 with Hole Black Part 711 ×1
  • Plate Special 2 x 4 with Train Coupler, Open for Magnet [Reinforced] Red Part 753 ×4

Panels 4 pieces

  • Panel, Trapezoid, Tipper End Flat with Pins, 1 x 2 Anti-studs Black Part 3145 ×4

Windows and Doors 4 pieces

  • Window 1 x 1 x 1 Classic with Long Sill [Complete] Red Part 3087bc01 ×2
  • Window 1 x 1 x 2, Extended Lip, Hollow Stud [with Glass] Red Part 29bc01 ×2

Bricks Sloped 1 piece

  • Brick Sloped 45° 2 x 1 Triple with Hollow Underside Red Part 3048a ×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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