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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.

WeDo 2.0 Core Set

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45300 WeDo 2.0 Core Set

284 pieces in 108 part and color combinations.

LEGO counts 280 pieces. This inventory comes from a separate parts catalog and lists 284; the two do not always count the same elements, so their totals differ. 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 53 pieces

  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Plate 2 x 16 Black Part 4282 Element 428276 or 428226 ×2
  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×4
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×6
  • String Cord Poly, 1.5mm Thickness, 50cm Black Part 23241 Element 6123991 ×1
  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle Connector Double Flexible [Rubber] Black Part 45590 Element 4198367 ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×2
  • Technic Brick Special 2 x 2 with 10.2mm Balls with Holes and Axle Hole Black Part 17114 Element 6092732 ×1
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×2
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Black Part 32530 Element 4144024 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×8
  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×2
  • Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×1
  • Tyre 30.4 x 14 Offset Tread [Centre Band] Black Part 92402 Element 4619323 ×4
  • Tyre 37 x 18 R Balloon Black Part 56891 Element 6589426 or 6518543 ×2

White 45 pieces

  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×2
  • Brick Special 1 x 1 with Stud on 1 Side White Part 87087 Element 6550190 or 4558952 ×2
  • Hub, We-Do White Part 19071 Element 6257893 or 6181656 ×1
  • Lever Small Base with Black Lever White Part 298c02 Element 73737 1 spare in the box ×2
  • Motor, Medium, We-Do 2.0 White Part 21980 Element 6456177 or 6290182 ×1
  • Plate 1 x 12 White Part 60479 Element 6552130 or 6548269 ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×6
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×4
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) White Part 18674 Element 6615555 or 6093053 ×2
  • Sensor, Motion, We-Do 2.0 2 x 4 x 1 White Part 20844 Element 6299496 or 6215361 ×1
  • Sensor, Tilt, We-Do 2.0 2 x 4 x 1 White Part 20841 Element 6327011 or 6186153 ×1
  • Storage / Sorting Tray, Dacta, 13 Cups [For New Style Storage Bins] White Part 54572 ×1
  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×2
  • Technic Gear Rack 1 x 4 White Part 3743 Element 6457281 or 4250465 ×4
  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×2
  • Tile Round 2 x 2 with Offset Black Eye Print White Part 14769pr1003 Element 6545267 or 6060734 ×2
  • Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes White Part 55982 Element 6092256 or 4490128 ×6

Lime 32 pieces

  • Brick Curved 3 x 1 No Studs Lime Part 50950 Element 4537928 ×2
  • Brick Curved 6 x 1 Lime Part 42022 Element 6139693 or 6030150 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Lime Part 3040b Element 4537925 or 4164024 ×4
  • Brick Sloped Inverted 33° 3 x 1 with Internal Stopper and No Front Stud Connection Lime Part 4287c Element 6138622 ×4
  • Technic Axle and Pin Connector Angled #4 - 135° Lime Part 32192 Element 6262901 or 6097773 ×2
  • Technic Brick 1 x 12 [11 Pin Holes] Lime Part 3895 Element 6132377 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Lime Part 3703 Element 6132379 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Lime Part 3700 Element 6132372 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Lime Part 3701 Element 6132373 or 4166527 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Lime Part 3702 Element 6132375 ×2
  • Wedge Plate 4 x 6 Cut Corners Lime Part 32059 Element 6116514 ×2

Bright Light Orange 30 pieces

  • Brick 2 x 4 Bright Light Orange Part 3001 Element 6100027 or 4645053 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 Bright Light Orange Part 85984 Element 6024286 or 6020097 ×4
  • Brick Sloped 33° 3 x 1 Bright Light Orange Part 4286 Element 6131583 ×4
  • Brick Sloped Inverted 45° 2 x 1 Bright Light Orange Part 3665 Element 6136455 or 6032919 ×4
  • Sports Snowboard Small Bright Light Orange Part 18746 Element 6105957 ×2
  • Technic Ball Joint Bright Light Orange Part 32474 Element 6071608 ×4
  • Technic Plate 2 x 4 [3 Holes] Bright Light Orange Part 3709 Element 6132408 ×4
  • Technic Plate 2 x 6 [5 Holes] Bright Light Orange Part 32001 Element 6132409 ×4

Light Bluish Gray 26 pieces

  • Brick Sloped 65° 2 x 1 x 2 Light Bluish Gray Part 60481 Element 4515374 ×4
  • Brick Special 1 x 2 with Pin Light Bluish Gray Part 2458 Element 4211364 ×4
  • Plate Special 3 x 2 with Rounded End, Hole Light Bluish Gray Part 3176 Element 4211419 ×1
  • Plate Special 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 64799 Element 4612621 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×2
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×2
  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×4
  • Technic Worm Gear Light Bluish Gray Part 4716 Element 4211510 ×1
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×4

Medium Azure 20 pieces

  • Brick 1 x 2 Medium Azure Part 3004 Element 6603336 or 6092674 ×6
  • Brick 1 x 4 Medium Azure Part 3010 Element 6603319 or 6036238 ×2
  • Brick 2 x 2 Medium Azure Part 3003 Element 6603316 or 4653970 ×2
  • Brick 2 x 4 Medium Azure Part 3001 Element 6603313 or 4625629 ×2
  • Brick Curved 4 x 1 Double, No Studs Medium Azure Part 93273 Element 6097093 ×2
  • Plate Round 4 x 4 with Pin Hole Medium Azure Part 60474 Element 6102828 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Medium Azure Part 32016 Element 6261392 or 6133917 ×2
  • Tile 1 x 2 with Groove Medium Azure Part 3069b Element 6603315 or 4649741 ×2

Dark Bluish Gray 19 pieces

  • Chain 16L [21 Links] Dark Bluish Gray Part 60169 Element 6258887 or 4516456 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×4
  • Technic Brick Special 2 x 2 with Ball and Axle Hole, with 6 Holes in Ball Dark Bluish Gray Part 57909b Element 4497253 ×2
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×2
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×4
  • Technic Reel 3 x 2 Dark Bluish Gray Part 32012 Element 32012199 or 4239891 ×1
  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×2

Trans-Light Blue 16 pieces

  • Brick Curved 6 x 1 Trans-Light Blue Part 42022 Element 6514068 or 6240378 ×2
  • Brick Round 2 x 2 with Axle Hole Trans-Light Blue Part 3941 Element 6514282 or 6273153 ×4
  • Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole Trans-Light Blue Part 92013 Element 6045980 ×4
  • Technic Wedge Belt Wheel [aka Pulley] Trans-Light Blue Part 4185 Element 6514360 or 6321351 ×6

Bright Green 13 pieces

  • Plant, Flower 2 x 2 Leaves - Angular Bright Green Part 4727 Element 4143562 ×1
  • Plant, Grass Stem with Bar Hole [3.2mm] Bright Green Part 15279 Element 6566117 or 6413056 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Bright Green Part 4032a Element 6138624 or 4114430 ×2
  • Technic Beam 1 x 7 Thick Bright Green Part 32524 Element 6097392 ×2
  • Technic Beam 3 x 5 L-Shape Thick Bright Green Part 32526 Element 6097397 ×2
  • Technic Pin Connector Round [Slotted] Bright Green Part 62462 Element 6173135 or 6097400 ×2
  • Technic Plate 2 x 8 [7 Holes] Bright Green Part 3738 Element 6138494 ×2

Red 7 pieces

  • Plant, Flower 2 x 2 - Round [Solid Stud] Red Part 98262 Element 6000020 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×4
  • Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Red Part 85544 Element 4544145 or 4544143 ×2

Tan 6 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4
  • Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×2

Yellow 6 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×4
  • Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×2

Trans-Clear 2 pieces

  • Storage Bin Lid, Dacta [For New Style Trays] Trans-Clear Part 54190 ×1
  • Technic Gearbox 2 x 4 x 3 1/3 Trans-Clear Part 6588 Element 6507887 or 6254290 ×1

Trans-Green 2 pieces

  • Brick Round 1 x 1 Open Stud Trans-Green Part 3062b Element 6514234 or 6238046 ×2

Trans-Red 2 pieces

  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×2

Trans-Yellow 2 pieces

  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2

Blue 1 piece

  • Storage Bin, Dacta, Small [New Style] Blue Part 900581 ×1

Orange 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 45300-1 [No Color/Any Color] Part 45300 Element 6138763 ×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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