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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.

Large Train Engine with Tender Black (Motorizable, sets 4534, 4535)

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4186868 Large Train Engine with Tender Black (Motorizable, sets 4534, 4535)

204 pieces in 58 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 43 pieces

  • Brick 1 x 10 Black Part 6111 Element 611126 ×2
  • Brick 1 x 2 Black Part 3004 Element 300426 ×26
  • Brick 1 x 4 Black Part 3010 Element 301026 ×6
  • Brick 1 x 6 Black Part 3009 Element 300926 ×2
  • Brick 2 x 4 Black Part 3001 Element 300126 ×2
  • Brick 2 x 6 Black Part 2456 Element 4181144 or 245626 ×5

Bricks Sloped 32 pieces

  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×2
  • Brick Sloped 33° 3 x 4 Black Part 3297 Element 6435854 or 329726 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×8
  • Brick Sloped 45° 2 x 4 Black Part 3037 Element 303726 ×6
  • Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube Black Part 3678a Element 367826 ×6
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Black Part 4460a ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×4

Plates Special 27 pieces

  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×6
  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×4
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Black Part 4623 Element 4597267 or 462326 ×1
  • Plate Special 1 x 2 with Door Rail Black Part 32028 Element 4107761 ×8
  • Plate Special 1 x 2 with Ladder Black Part 4175 Element 6285241 or 6179557 ×6
  • Plate Special 1 x 8 with Door Rail Black Part 4510 Element 4286009 or 451026 ×2

Plates 26 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×6
  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • 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 6 x 12 Black Part 3028 Element 302826 ×1
  • Plate 2 x 10 Light Gray Part 3832 Element 383202 ×1
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×4
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×4
  • Plate 4 x 4 Light Gray Part 3031 Element 4243813 or 303102 ×1

Bricks Special 15 pieces

  • Brick Special 1 x 1 with Handle Black Part 2921 Element 6170566 or 292126 ×12
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×3

Plates Round Curved and Dishes 13 pieces

  • Dish 4 x 4 Inverted [Radar] Black Part 3960 Element 396026 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×1
  • Plate Round 1 x 1 with Solid Stud Dark Gray Part 6141 Element 4124087 or 614127 1 spare in the box ×7
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

Transportation - Land 9 pieces

  • Train Buffer Beam Black Part 4022 Element 4109853 or 402276 ×4
  • Vehicle Base, Train 6 x 24 with Two 1 x 2 Cutouts and 3 Round Holes Each End Black Part 6584 Element 4159942 or 658476 ×1
  • Wheel Holder, Train with Wheels [Complete Assembly] Black Part 2878c01 Element 4207401 or 74784 ×4

Magnets and Holders 8 pieces

  • Magnet Cylindrical Black Part 73092 Element 73092 ×4
  • Train Coupling New Black Part 2920 Element 4299239 or 292076 ×4

Panels 7 pieces

  • Panel 1 x 2 x 1 [Square Corners] Black Part 4865a Element 486526 ×2
  • Panel 1 x 4 x 3 [Hollow Studs] Black Part 4215b Element 4105207 ×5

Bricks Round and Cones 5 pieces

  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder Black Part 30367b Element 4158779 ×2
  • Brick Round 1 x 1 Open Stud Dark Gray Part 3062b Element 4113912 or 306227 ×2
  • Cone 1 x 1 [No Top Groove] Yellow Part 4589 Element 458924 ×1

Bricks Curved 4 pieces

  • Brick Arch 1 x 6 Black Part 3455 Element 345526 ×4

Tiles Special 4 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×1
  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×2
  • Tile Special 6 x 4 with Beveled Edges and 5mm Pin (Train Bogie Plate) Black Part 4025 Element 6096842 or 6051914 ×1

Windows and Doors 4 pieces

  • Window 1 x 2 x 2 Plane, Solid Studs Black Part 2377 Element 237726 ×4

Bars, Ladders and Fences 1 piece

  • Bar 6.6L with Stop Ring [Umbrella Stand] Black Part 4095 Element 409526 ×1

Minifig Accessories 1 piece

  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×1

Stickers 1 piece

  • Sticker Sheet for Sets 4534-1, 4186868-1, 10205-1 [No Color/Any Color] Part 41790 Element 4159998 ×1

Technic Axles 1 piece

  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×1

Technic Bricks 1 piece

  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin White Part 32064a Element 6548286 or 6178921 ×1

Tiles 1 piece

  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Gray Part 4150pr0022 Element 4140520 ×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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