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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.

40 Years of LEGO Trains

Checking

40370 40 Years of LEGO Trains

184 pieces in 70 part and color combinations, plus 1 minifigure.

The official piece count includes the 4 parts inside the set's minifigures, which this inventory lists separately. 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

Black 100 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×1
  • Brick 1 x 1 Black Part 3005 Element 300526 ×6
  • Brick 1 x 2 Black Part 3004 Element 300426 ×5
  • Brick 1 x 2 x 2 with Inside Stud Holder Black Part 3245c Element 4618852 ×2
  • Brick 1 x 3 Black Part 3622 Element 362226 ×2
  • Brick 1 x 4 Black Part 3010 Element 301026 ×4
  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick 2 x 4 Black Part 3001 Element 300126 ×1
  • Brick 2 x 6 Black Part 2456 Element 4181144 or 245626 ×2
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×3
  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×2
  • Brick Sloped 33° 3 x 3 Black Part 4161 Element 416126 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×4
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Sloped 45° 2 x 3 Black Part 3038 Element 303826 ×2
  • Brick Sloped 45° 2 x 4 Black Part 3037 Element 303726 ×4
  • Brick Sloped 75° 2 x 2 x 3 [Solid Studs] Black Part 98560 Element 6007896 ×2
  • Brick Sloped Inverted 45° 4 x 1 Double with 1 x 2 Recessed Black Part 32802 Element 6267482 ×1
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×2
  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 1 x 3 Black Part 3623 Element 362326 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 1 x 6 Black Part 3666 Element 366626 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 6 x 6 Black Part 3958 Element 395826 ×1
  • Plate 6 x 8 Black Part 3036 Element 303676 or 303626 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×3
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Black Part 99206 Element 6052126 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×1
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×6
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 1 spare in the box ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×2
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Window 1 x 2 x 2 Flat Front Black Part 60592 Element 6382697 or 4521439 ×4

Red 47 pieces

  • Brick 1 x 4 Red Part 3010 Element 301021 ×2
  • Brick 2 x 10 Red Part 3006 Element 4617857 or 300621 ×2
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×1
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×2
  • Plate 2 x 16 Red Part 4282 Element 428221 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×5
  • Plate 2 x 4 Red Part 3020 Element 302021 ×3
  • Plate 2 x 6 Red Part 3795 Element 379521 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Red Part 2654 Element 4617080 or 4278275 ×4
  • Plate Special 1 x 2 with Ladder Red Part 4175 Element 6285246 or 6179575 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Red Part 3176 Element 4188189 or 317621 ×2
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×3
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×2
  • Tile Special Round 2 x 2 with Hole Red Part 15535 Element 6102138 ×4
  • Train Wheel Spoked with Technic Axle Hole and Rubber Friction Band Red Part 57999 Element 6369509 or 6148299 ×6

Light Bluish Gray 17 pieces

  • Plate 4 x 10 Light Bluish Gray Part 3030 Element 4211402 ×2
  • Plate 6 x 10 Light Bluish Gray Part 3033 Element 4211405 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×1
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×3
  • Tile 2 x 2 with Groove Light Bluish Gray Part 3068b Element 4211413 ×3
  • Tile 2 x 3 Light Bluish Gray Part 26603 Element 6171894 ×4

Trans-Clear 10 pieces

  • Brick 2 x 2 without Inside Ridges Trans-Clear Part 6223 Element 6514093 or 6239418 ×2
  • Glass for Window 1 x 2 x 2 Flat Trans-Clear Part 60601 Element 6673770 or 6524697 ×4
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×4

Flat Silver 3 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Flat Silver Part 2412b Element 4619636 ×3

Trans-Yellow 3 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×3

Yellow 2 pieces

  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×2

Dark Bluish Gray 1 piece

  • Plate Special 4 x 4, Studs on One Edge Plain] Dark Bluish Gray Part 6179 Element 4509911 or 4210849 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 40370-1 [No Color/Any Color] Part 66886 Element 6291474 ×1

Minifigures 1 figure

  • Blue Torso, Blue Legs, Red Hat 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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