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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.

Micro Command Center

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40786 Micro Command Center

212 pieces in 76 part and color combinations, plus 1 minifigure.

The official piece count includes the 2 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

Plates 66 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 1 x 10 Blue Part 4477 Element 447723 ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×2
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×8
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×3
  • Plate 1 x 6 Blue Part 3666 Element 366623 ×5
  • Plate 2 x 10 Blue Part 3832 Element 383223 ×1
  • Plate 2 x 2 Corner Blue Part 2420 Element 242073 or 242023 ×2
  • Plate 2 x 3 Blue Part 3021 Element 302123 ×5
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2
  • Plate 3 x 3 Blue Part 11212 Element 6307275 ×10
  • Plate 4 x 8 Blue Part 3035 Element 303523 ×2
  • Plate 6 x 6 Blue Part 3958 Element 4199519 or 395823 ×1
  • Plate 6 x 8 Blue Part 3036 Element 303673 or 303623 ×1
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×1
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×1
  • Plate 1 x 2 Trans-Yellow Part 3023 Element 6514002 or 6240211 ×6
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×4
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×1

Plates Round Curved and Dishes 27 pieces

  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×3
  • Plate Round Corner 3 x 3 Blue Part 30357 Element 6288176 or 6132256 ×4
  • Dish 3 x 3 Inverted [Radar] Light Bluish Gray Part 43898 Element 6070564 or 4568360 ×1
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×7
  • Plate Round Corner 3 x 3 with 2 x 2 Round Cutout Light Bluish Gray Part 68568 Element 6383110 ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 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 ×5
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×1

Tiles 27 pieces

  • Tile 1 x 6 with Groove Blue Part 6636 Element 4118785 or 4108153 ×1
  • Tile 1 x 8 with Groove Blue Part 4162 Element 416223 ×2
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×1
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×3
  • Tile 1 x 6 with Groove Light Bluish Gray Part 6636 Element 4211549 ×12
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×6
  • Tile 2 x 2 Corner Light Bluish Gray Part 14719 Element 6065824 ×2

Tiles Round and Curved 16 pieces

  • Tile 2 x 2 Curved, Macaroni Blue Part 27925 Element 6194724 ×4
  • Tile 2 x 2 Curved, Macaroni Light Bluish Gray Part 27925 Element 6163990 ×4
  • Tile 3 x 3 Curved, Macaroni Light Bluish Gray Part 79393 Element 6385740 ×4
  • Tile 4 x 4 Curved, Macaroni Light Bluish Gray Part 27507 Element 6458164 or 6163989 ×4

Plates Special 14 pieces

  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Black Part 87580 Element 6663108 or 4565323 ×1
  • Plate Special 2 x 2 with Towball Socket, Short, Flattened with Holes and Axle Hole in Center Black Part 63082 Element 6273226 or 4529064 ×1
  • Plate Special 2 x 2 with Towball and Hole Black Part 15456 Element 6448318 or 6359224 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Blue Part 87580 Element 6126049 or 4565319 ×3
  • Plate Special 1 x 1 Rounded with Handle Light Bluish Gray Part 26047 Element 6225246 ×1
  • Plate Special 1 x 4 with 2 Studs with Groove [New Underside] Light Bluish Gray Part 41740 Element 6257593 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted White Part 99207 Element 6552151 or 6548279 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] White Part 48336 Element 6552125 or 4222017 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) White Part 15573 Element 6550152 or 6051511 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) White Part 87580 Element 6550157 or 6126046 ×1

Bricks 13 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×3
  • Brick 1 x 1 x 3 Blue Part 14716 Element 6469934 ×1
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×1
  • Brick 1 x 6 Blue Part 3009 Element 300923 ×4
  • Brick 1 x 8 Blue Part 3008 Element 300823 ×1
  • Brick 2 x 6 Blue Part 2456 Element 4181139 or 245623 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×2

Panels 9 pieces

  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Trans-Yellow Part 87552 Element 6581815 or 6328335 ×7
  • Panel 1 x 2 x 2 [Side Supports / Hollow Studs] White Part 87552 Element 6615549 or 4585458 ×2

Bricks Round and Cones 8 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2
  • Brick Round 1 x 1 Open Stud Blue Part 3062b Element 306223 ×6

Bricks Special 8 pieces

  • Brick Special 1 x 1 with Handle Black Part 2921 Element 6170566 or 292126 ×2
  • Brick Special 1 x 1 with Studs on 2 Sides Light Bluish Gray Part 47905 Element 4213567 ×4
  • Brick Special 1 x 2 with Grille Light Bluish Gray Part 2877 Element 4211383 ×2

Bricks Curved 6 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Trans-Light Blue Part 11477 Element 6508249 or 6435020 ×4
  • Brick Curved 2 x 2 x 2/3 White Part 15068 Element 6552147 or 6047220 ×2

Bricks Sloped 6 pieces

  • Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×2
  • Brick Sloped 45° 2 x 2 Double Convex Blue Part 3045 Element 6439889 or 6234158 ×2
  • Brick Sloped 45° 2 x 4 Blue Part 3037 Element 4107437 or 303723 ×2

Tiles Special 6 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×3
  • Tile Special 1 x 1 with Clip with Rounded Edges White Part 15712 Element 6348055 or 6054551 ×2

Bars, Ladders and Fences 3 pieces

  • Antenna 1 x 4 with Flat Top Black Part 3957b Element 395726 ×2
  • Bar 2L with Stop in Center Black Part 78258 Element 6371584 1 spare in the box ×1

Supports, Girders and Cranes 2 pieces

  • Support 2 x 4 x 5 Stanchion Inclined [5mm wide posts] Blue Part 4476b Element 6469896 or 4142127 ×2

Stickers 1 piece

  • Sticker Sheet for Set 40786-1 [No Color/Any Color] Part 10112745 Element 6541043 ×1

Minifigures 1 figure

  • Classic Space Baby, Blue 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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