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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.

Mini Trains

Checking

4837 Mini Trains

73 pieces in 36 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.

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

Light Bluish Gray 21 pieces

  • Bracket 1 x 2 - 1 x 4 [Square Corners] Light Bluish Gray Part 2436 Element 4282740 or 4211358 ×1
  • Brick Special 1 x 1 with Handle Light Bluish Gray Part 2921 Element 6170569 or 4225532 ×2
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Light Bluish Gray Part 48336 Element 4244627 ×2
  • Plate Special 2 x 2 with Towball Light Bluish Gray Part 3729 Element 4239654 ×1
  • Plate Special 2 x 2 with Wheel Holders Light Bluish Gray Part 4600 Element 4211504 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4
  • Wheel 18 x 8 with Fake Bolts and Shallow Spokes Light Bluish Gray Part 56902 Element 4499259 ×4
  • Wheel 8 x 6 Light Bluish Gray Part 4624 Element 4211506 ×4

Black 20 pieces

  • Antenna 1 x 4 with Rounded Top Black Part 3957a ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 ×4
  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Black Part 30367b Element 4158779 ×2
  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×1
  • Cone 2 x 2 x 2, Open Stud Black Part 3942c Element 6092664 or 6022160 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 Also in Dark Bluish Gray ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×3
  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×1
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×2
  • Plate Special 2 x 2 with Towball Socket, Short, 4 Slots Black Part 3730 Element 373026 ×1

Green 14 pieces

  • Brick Special 1 x 2 with Grille Green Part 2877 Element 6078096 or 287728 ×4
  • Plate 1 x 2 Green Part 3023 Element 302328 ×3
  • Plate 1 x 4 Green Part 3710 Element 371028 ×1
  • Plate 2 x 2 Green Part 3022 Element 302228 ×2
  • Plate 2 x 3 Green Part 3021 Element 302128 ×1
  • Plate 2 x 4 Green Part 3020 Element 302028 ×1
  • Plate 2 x 8 Green Part 3034 Element 303428 ×1
  • Plate 4 x 4 Green Part 3031 Element 4243821 or 4113158 ×1

Dark Bluish Gray 6 pieces

  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×1
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 Also in Black ×3
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×2

Dark Green 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Green Part 54200 Element 6618111 or 4504375 1 spare in the box ×4

White 3 pieces

  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×3

Trans-Clear 2 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2

Trans-Yellow 2 pieces

  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 ×2

Trans-Green 1 piece

  • Tile 1 x 1 with Groove Trans-Green Part 3070b Element 6581818 or 6254249 1 spare in the box ×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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