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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.

Mini Steamboat Willie

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40659 Mini Steamboat Willie

420 pieces in 113 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

White 173 pieces

  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×2
  • Brick 1 x 1 x 3 White Part 14716 Element 6548277 or 6055541 ×4
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×3
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×2
  • Brick Curved 4 x 1 Double, No Studs White Part 93273 Element 6552143 or 6023806 ×1
  • Brick Curved, 3 x 1 with 1/3 Inverted Cutout White Part 70681 Element 6615523 or 6357598 ×6
  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs White Part 48092 Element 6550183 or 6337627 ×4
  • Brick Sloped 33° 3 x 2 White Part 3298 Element 329801 ×2
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×1
  • Brick Special 1 x 2 with Grille White Part 2877 Element 6552093 or 287701 ×7
  • Equipment Candlestick White Part 37762 Element 6234807 ×2
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 2 spares in the box ×24
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×2
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×6
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×2
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×6
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×5
  • Plate Round Half 3 x 6 with 1 x 2 Cutout White Part 18646 Element 6609538 or 6192352 ×2
  • Plate Round Half 4 x 8 White Part 22888 Element 6138699 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] White Part 61252 Element 6347293 or 4538353 ×32
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] White Part 60897 Element 6330191 or 4613256 ×2
  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs White Part 75937 Element 6009016 ×4
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) White Part 18674 Element 6615555 or 6093053 ×2
  • Technic Axle Pin 3L without Friction Ridges and 2L Axle White Part 65249 Element 6289797 ×4
  • Technic Brick 1 x 1 with Pin Hole White Part 6541 Element 6609542 or 654101 ×2
  • Technic Plate 2 x 4 [3 Holes] White Part 3709 Element 370901 ×5
  • Technic Plate 2 x 8 [7 Holes] White Part 3738 Element 4527945 or 373801 ×1
  • Technic Wedge Belt Wheel [aka Pulley] White Part 4185 Element 6564907 or 6330136 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×16
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×6
  • Tile 1 x 8 with Groove White Part 4162 Element 6552110 or 416201 ×4
  • Tile Special Round 1 x 1 with Hollow Bar White Part 20482 Element 6186681 or 6178492 1 spare in the box ×2
  • Tile Special Round 2 x 2 with Hole White Part 15535 Element 6310185 ×4
  • Window 1 x 2 x 2 Flat Front White Part 60592 Element 6550187 or 6382045 ×4

Black 80 pieces

  • Bar 3L Black Part 87994 Element 6185316 or 6093525 1 spare in the box ×1
  • Brick 1 x 4 Black Part 3010 Element 301026 ×2
  • Brick Arch 1 x 3 x 2 Curved Top Black Part 6005 Element 4618880 or 4188168 ×4
  • Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Black Part 11153 Element 6580394 or 6037746 ×4
  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×3
  • Brick Round 3 x 3 x 2 Recessed Center with 2 x 2 Studs and Axle Hole Black Part 73111 Element 6375973 ×5
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×4
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Black Part 15672 Element 6069000 or 4653087 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×8
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Wedged, Curved 8 x 3 x 2 Open Left Black Part 41750 Element 6271277 or 6185621 ×2
  • Brick Wedged, Curved 8 x 3 x 2 Open Right Black Part 41749 Element 6271278 or 6185619 ×2
  • Flag 2 x 2 Trapezoid with Flared Area between Clips Black Part 80324 Element 6363033 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×9
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Steering Wheel Small, 2 x 2 [Reinforced] Black Part 16091 Element 6057397 ×1
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×1
  • Technic Brick 1 x 10 [9 Pin Holes] Black Part 2730 Element 273026 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×3
  • Technic Bush Black Part 3713 Element 6332148 or 6210506 1 spare in the box ×8
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×4
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×4
  • Tile Round 1 x 1 Black Part 98138 Element 6284070 or 6139403 1 spare in the box ×2
  • Tyre Offset Tread with Center Band 23 x 7 Black Part 61254 Element 4541455 ×2

Light Bluish Gray 46 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip] Light Bluish Gray Part 3484 Element 6439041 ×1
  • Bracket 3 x 2 x 1 1/3 with Bottom Stud Holder Light Bluish Gray Part 73562 Element 6347992 ×4
  • Brick 1 x 1 Light Bluish Gray Part 3005 Element 4211389 ×3
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×1
  • Brick Round 2 x 2, Pin Holes Light Bluish Gray Part 17485 Element 6372076 or 6078985 ×5
  • Bucket 1 x 1 x 1 Light Bluish Gray Part 95343 Element 6057487 ×1
  • Plate 1 x 1 Light Bluish Gray Part 3024 Element 4211399 1 spare in the box ×3
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×2
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×1
  • Plate Special 1 x 2, Top Clip [Open O] Light Bluish Gray Part 44861 Element 6326078 ×1
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated Version Light Bluish Gray Part 4304 Element 6469440 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×1
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Light Bluish Gray Part 42195 Element 6273212 ×1
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×3
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×2
  • Tile 1 x 1 with Groove Light Bluish Gray Part 3070b Element 4211415 1 spare in the box ×6
  • Tile Special 2 x 2 with Top Pin [Squared Holes] Light Bluish Gray Part 49153 Element 6313188 ×1
  • Tile Special Round 2 x 2 with Hole Light Bluish Gray Part 15535 Element 6179186 ×1
  • Wheel 18 x 8 with Fake Bolts and Shallow Spokes and Axle Hole Light Bluish Gray Part 56903 Element 6357599 ×2

Yellow 24 pieces

  • Bracket 1 x 2 - 1 x 2 Yellow Part 99781 Element 6185994 ×4
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×6
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×8
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 2 spares in the box ×6

Tan 18 pieces

  • Plate 1 x 5 Tan Part 78329 Element 6351905 ×4
  • Plate 2 x 3 Tan Part 3021 Element 4118790 or 302105 ×10
  • Wedge Plate 2 x 2 Cut Corner Tan Part 26601 Element 6236914 ×4

Dark Bluish Gray 17 pieces

  • Bar 2L with Stop in Center Dark Bluish Gray Part 78258 Element 6350724 1 spare in the box ×1
  • Bar Holder with Hole and Bar Handle Dark Bluish Gray Part 23443 Element 6397633 ×1
  • Bracket 1 x 2 - 2 x 4 Dark Bluish Gray Part 93274 Element 6118832 or 4648067 ×2
  • Bucket 1 x 1 x 1 Handle Dark Bluish Gray Part 95344 Element 6245283 or 6167664 1 spare in the box ×1
  • Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×1
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 ×4
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 ×6

Red 15 pieces

  • Bracket 1 x 2 - 2 x 2 Inverted Red Part 99207 Element 6001806 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×3
  • Plate 2 x 6 Red Part 3795 Element 379521 ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×2
  • Technic Axle 12 Red Part 3708 Element 6147702 or 4125190 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×1
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×1

Green 13 pieces

  • Bracket 1 x 2 - 2 x 2 Green Part 44728 Element 6117971 or 6048853 ×2
  • Plate 1 x 4 Green Part 3710 Element 371028 ×3
  • Technic Beam 1 x 3 Thin Green Part 6632 Element 6374071 or 6036557 ×8

Magenta 12 pieces

  • Plate 1 x 1 Magenta Part 3024 Element 6096942 or 6014499 2 spares in the box ×12

Blue 8 pieces

  • Plate 1 x 3 Blue Part 3623 Element 362323 ×4
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×4

Lime 8 pieces

  • Plate 1 x 2 Lime Part 3023 Element 4164037 or 4122439 ×6
  • Technic Axle Connector Smooth [with x Hole + Orientation] Lime Part 59443 Element 6302735 ×2

Bright Green 2 pieces

  • Bracket 1 x 2 - 2 x 2 Inverted Bright Green Part 99207 Element 6401818 ×2

Dark Red 2 pieces

  • Bracket 1 x 2 - 2 x 2 Dark Red Part 44728 Element 6267486 ×2

Reddish Brown 2 pieces

  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×2

Minifigures 1 figure

  • Mickey Mouse, Classic Black and White 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

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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.

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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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