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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.

Special Elements For Mechanical Engineering Set

Checking

970679 Special Elements For Mechanical Engineering Set

130 pieces in 38 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

Plates 28 pieces

  • Plate 1 x 10 Light Bluish Gray Part 4477 Element 4251149 or 4211495 ×4
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×4
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×4
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×4
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×2
  • Plate 6 x 8 Light Bluish Gray Part 3036 Element 4211408 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×7

String, Bands and Reels 24 pieces

  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 ×9
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×5
  • Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Red Part 85544 Element 4544145 or 4544143 ×5
  • Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×5

Plates Special 16 pieces

  • Plate Special 1 x 2 with Door Rail Light Bluish Gray Part 32028 Element 4211568 ×4
  • Technic Plate 2 x 4 [3 Holes] Light Bluish Gray Part 3709 Element 4211444 ×8
  • Technic Plate 2 x 8 [7 Holes] Light Bluish Gray Part 3738 Element 4211449 ×4

Technic Axles 16 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 5 Black Part 32073 Element 4114740 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×2

Technic Bricks 16 pieces

  • Technic Brick 1 x 12 [11 Pin Holes] Blue Part 3895 Element 389523 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] Blue Part 3894 Element 389423 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Blue Part 3702 Element 370223 ×4

Bricks 8 pieces

  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×8

Technic Special 6 pieces

  • Technic Link 1 x 11 Blue Part 6247 Element 624723 ×4
  • Technic Cam Light Bluish Gray Part 6575 Element 6345502 or 6226941 ×2

Tiles 6 pieces

  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×2
  • Tile 1 x 8 with Groove Blue Part 4162 Element 416223 ×2
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×2

Technic Beams 4 pieces

  • Technic Beam 1 x 4 Thin with Stud Connector Light Bluish Gray Part 2825 Element 6331574 or 4211561 ×2
  • Technic Beam 1 x 5 Thin Light Bluish Gray Part 32017 Element 4503416 or 4211554 ×2

Technic Gears 4 pieces

  • Technic Gear 12 Tooth Double Bevel Green Part 32270 Element 4144370 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Green Part 32269 Element 4144369 ×2

Technic Connectors 2 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Bluish Gray Part 6538b Element 4211543 ×2

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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