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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.

LEGOLAND Train

Checking

40166 LEGOLAND Train

195 pieces in 65 part and color combinations, plus 4 minifigures.

LEGO counts 210 pieces. This inventory comes from a separate parts catalog and lists 211, including the 16 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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

Red 57 pieces

  • Brick 1 x 4 Red Part 3010 Element 301021 ×6
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Red Part 6091 Element 6184782 or 609121 ×4
  • Brick Curved 2 x 2, Two Top Studs Red Part 30165 Element 4521852 or 4142112 ×2
  • Brick Sloped 33° 3 x 4 Red Part 3297 Element 329721 ×2
  • Brick Sloped 45° 2 x 1 Double with Inside Stud Holder Red Part 3044c Element 4157124 ×1
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×6
  • Brick Special 1 x 2 with 2 Studs on 1 Side Red Part 11211 Element 6019155 ×1
  • Cone 1 x 1 [Top Groove] Red Part 59900 Element 4529234 ×4
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×4
  • Plate 1 x 10 Red Part 4477 Element 447721 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 1 x 4 Red Part 3710 Element 371021 ×5
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Red Part 60897 Element 6337002 or 4588003 ×4
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Red Part 15573 Element 6092565 ×9
  • Seat / Chair 2 x 2 with Center Sprue Mark Red Part 4079b Element 407921 ×1
  • Tile 1 x 4 with Groove Red Part 2431 Element 243121 ×1

Blue 47 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×22
  • Brick Arch 1 x 6 Raised Arch Blue Part 92950 Element 6133607 or 4618877 ×1
  • Cone 2 x 2 x 2, Open Stud Blue Part 3942c Element 6092663 or 6022149 ×1
  • Panel 1 x 2 x 1 [Rounded Corners] Blue Part 4865b Element 6146218 ×2
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×3
  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 1 spare in the box ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Blue Part 4081b Element 6281991 or 4632567 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Blue Part 15573 Element 6092582 ×8
  • Tap 1 x 1 without Hole in Spout Blue Part 4599b Element 459923 1 spare in the box ×4
  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×3

Black 32 pieces

  • Bar 6L with Stop Ring Black Part 63965 Element 6170421 or 6081988 ×1
  • Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 ×1
  • Equipment Camera Handheld with Central Viewfinder Black Part 30089b Element 6476480 or 4106552 ×1
  • Lever Small Base with Black Lever Black Part 298c02 Element 73587 1 spare in the box ×4
  • Plate 2 x 12 Black Part 2445 Element 244526 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×3
  • Plate Special 2 x 2 with Wheel Holders Black Part 4600 Element 460026 ×7
  • Wheel 11 x 6 mm with Five Spokes [Plain] Black Part 50944 Element 4246900 ×14

Green 24 pieces

  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×2
  • Brick 1 x 4 Green Part 3010 Element 4112838 or 301028 ×6
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×1
  • Plate 1 x 2 Green Part 3023 Element 302328 ×4
  • Plate 1 x 6 Green Part 3666 Element 366628 ×2
  • Plate 2 x 6 Green Part 3795 Element 379528 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Green Part 87580 Element 6389692 or 4565321 ×2
  • Tile 1 x 1 with Groove Green Part 3070b Element 4558593 or 4238528 1 spare in the box ×4
  • Tile 2 x 4 with Groove Green Part 87079 Element 4566179 ×2

Yellow 11 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Yellow Part 85984 Element 4550348 ×2
  • Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×1
  • Plate 1 x 12 Yellow Part 60479 Element 4514844 ×1
  • Plate 2 x 10 Yellow Part 3832 Element 383224 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×1
  • Plate 4 x 4 Yellow Part 3031 Element 4243817 or 303124 ×1
  • Plate 4 x 6 Yellow Part 3032 Element 303224 ×3

Light Bluish Gray 10 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×1
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×2
  • Plate Special 2 x 2 with Towball Socket, Short, Flattened with Holes and Axle Hole in Center Light Bluish Gray Part 63082 Element 6273227 or 4530469 ×2
  • Plate Special 2 x 2 with Towball and Hole Light Bluish Gray Part 15456 Element 6448319 or 6359225 ×3

Trans-Clear 5 pieces

  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Trans-Clear Part 87552 Element 6514185 or 6253231 ×4
  • Panel 1 x 4 x 3 [Side Supports / Hollow Studs] Trans-Clear Part 60581 Element 6514156 or 6344088 ×1

Dark Bluish Gray 3 pieces

  • Equipment Shovel [Rounded Handle End] Dark Bluish Gray Part 3837 Element 4211006 ×1
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×2

Bright Light Orange 2 pieces

  • Plate Special 1 x 2 with Ladder Bright Light Orange Part 4175 Element 6489353 or 6285247 ×2

White 2 pieces

  • Flag 2 x 2 Square, Flat Clip Edge [Thick Clips] White Part 11055 Element 6011794 ×1
  • Tile Round 2 x 2 with Bottom Stud Holder White Part 14769 Element 6601846 or 6044691 ×1

Reddish Brown 1 piece

  • Equipment Brush / Push Broom Reddish Brown Part 3836 Element 4211157 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 40166-1 [No Color/Any Color] Part 25806 Element 6142938 ×1

Minifigures 4 figures

  • Kid, White Torso, Dark Azure Legs, Yellow Hair Minifigure, checked as a whole figure ×1
  • Dark Purple Torso, Dark Purple Legs, Dark Brown Hair Minifigure, checked as a whole figure ×1
  • Dark Blue Torso, Dark Red Legs, Dark Tan Hair Minifigure, checked as a whole figure ×1
  • Light Bluish Grey Torso Jacket, Black Legs, Light BLuish Grey Hair, 3626cpr2522 Minifigure, checked as a whole figure ×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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