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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.

Locomotive with Motor

Checking

112-2 Locomotive with Motor

74 pieces in 25 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

Blue 43 pieces

  • Battery Box, 4.5V 7 x 11 x 3 Type 1 [Complete Assembly] Blue Part 468c01 ×1
  • Brick 1 x 1 Blue Part 3005 Element 300523 ×4
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×18
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×2
  • Brick 2 x 3 without Cross Supports Blue Part 3002a ×2
  • Brick Sloped 45° 2 x 1 without Bottom Pin Blue Part 3040a ×2
  • Brick Sloped 45° 2 x 2 Double Convex Blue Part 3045 Element 6439889 or 6234158 ×2
  • Brick Sloped 45° 2 x 4 Blue Part 3037 Element 4107437 or 303723 ×4
  • Motor, Train, 4.5V 12 x 4 x 4 Type I Blue Part upn0284c02 ×1
  • Plate 1 x 1 Blue Part 3024 Element 302423 ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×1
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2

Light Gray 19 pieces

  • Plate 1 x 1 Light Gray Part 3024 Element 302402 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×2
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×8
  • Plate Special 6 x 16 with Motor Opening Narrow Light Gray Part 3058a ×1
  • Tyre for Train Wheel for Electric Train Motor 12V Light Gray Part 458 ×4

Red 9 pieces

  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate Special 3 x 2 with Hole (Train Coupler Closed) with Hook Red Part 3176c01 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Red Part 3176 Element 4188189 or 317621 ×1
  • Train Wheel with 2 x 2 Stud Center, Beveled Tread and Cam Axle for Motor Red Part upn0384b ×4
  • Window 1 x 1 x 1 Classic with Long Sill [Complete] Red Part 3087bc01 ×2

Trans-Clear 2 pieces

  • Brick 2 x 3 without Cross Supports Trans-Clear Part 3002a ×2

Black 1 piece

  • Brick 2 x 4 without Cross Supports Black Part 3001a ×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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