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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 Robotics Construction Set

Checking

9580 WeDo Robotics Construction Set

158 pieces in 70 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 25 pieces

  • Brick 8 x 16 Dark Bluish Gray Part 4204 Element 6283470 or 4217133 ×1
  • Brick 1 x 4 Red Part 3010 Element 301021 ×2
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick 2 x 4 Red Part 3001 Element 300121 ×2
  • Brick 2 x 6 Red Part 2456 Element 4181138 or 245621 ×2
  • Brick 1 x 1 with Simple Black Eye with White Pupil Print White Part 3005pr0003 Element 4569080 ×4
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×2
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×2
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×2
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×2
  • Brick 2 x 6 Yellow Part 2456 Element 4181143 or 245624 ×2

Bricks Sloped 20 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×2
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×2
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2
  • Brick Sloped 33° 3 x 1 Yellow Part 4286 Element 428624 ×2
  • Brick Sloped 33° 3 x 2 Yellow Part 3298 Element 329824 ×2
  • Brick Sloped 45° 2 x 2 Yellow Part 3039 Element 303924 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Yellow Part 3747b Element 4500459 or 374724 ×2
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Yellow Part 4287b ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×2

Technic Bricks 16 pieces

  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Dark Bluish Gray Part 32064b ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×6
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×2

Plates 12 pieces

  • Plate 2 x 4 Green Part 3020 Element 302028 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×4

Technic Pins 10 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×6
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

Technic Gears 9 pieces

  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×2
  • Technic Gear 8 Tooth Dark Bluish Gray Part 3647 Element 4514559 ×2
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Bluish Gray Part 3650c Element 4211434 ×2
  • Technic Worm Gear Light Bluish Gray Part 4716 Element 4211510 ×1
  • Technic Gear Rack 1 x 4 White Part 3743 Element 6457281 or 4250465 ×2

Plates Special 8 pieces

  • Technic Plate 2 x 6 [5 Holes] White Part 32001 Element 6552133 or 4527947 ×4
  • Technic Plate 2 x 8 [7 Holes] White Part 3738 Element 4527945 or 373801 ×4

Hinges, Arms and Turntables 6 pieces

  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1
  • Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth Red Part 30365 Element 4173322 or 3036521 ×2
  • Turntable 2 x 2 Plate, Base Red Part 3680 Element 368021 ×1
  • Hinge Brick 1 x 2 Locking with 1 Finger Vertical End Yellow Part 30364 Element 4220284 or 3036424 ×2

Technic Axles 6 pieces

  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×2

Technic Bushes 6 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×6

Technic Special 5 pieces

  • Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 ×4
  • Technic Gearbox 2 x 4 x 3 1/3 Trans-Clear Part 6588 Element 6507887 or 6254290 ×1

Bricks Curved 4 pieces

  • Brick Curved 6 x 1 Red Part 42022 Element 4160390 ×2
  • Brick Curved 6 x 1 Yellow Part 42022 Element 4160392 ×2

Bricks Round and Cones 4 pieces

  • Brick Round 2 x 2 with Axle Hole Lime Part 3941 Element 4527943 or 4279733 ×4

Bricks Special 4 pieces

  • Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×4

Electronics 4 pieces

  • Hub, USB, We-Do Light Bluish Gray Part 33718 Element 6120860 ×1
  • Motor, Medium, Power Functions, 3 x 6 x 3 with Dark Bluish Gray Bottom and 20cm Wire Light Bluish Gray Part 58120 Element 6209881 or 6151440 ×1
  • Sensor, Motion, We-Do Light Bluish Gray Part 43718 Element 6120872 ×1
  • Sensor, Tilt, We-Do Light Bluish Gray Part 14618 ×1

Wheels and Tyres 4 pieces

  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Lime Part 4185 Element 6335116 or 4494219 ×2

String, Bands and Reels 3 pieces

  • String with End Studs 41L Overall Black Part 14226c41 Element 6096957 or 6074034 ×1
  • Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×2

Minifig Heads 2 pieces

  • Minifig Head, Brown Eyebrows Scared / Smiling Print [Blocked Open Stud] Yellow Part 3626bpr0495 ×1
  • Minifig Head, Eyebrows, Crows Feet with Open Mouth Scared / Mischievous Print Yellow Part 3626bpr0500 ×1

Minifig Headwear 2 pieces

  • Hat / Cap Long Peak [Plain] Lime Part 4485 Element 4527944 ×1
  • Hair Angular Swept Back Red Part 53982 Element 6031455 or 4292017 ×1

Plates Round Curved and Dishes 2 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Red Part 2654 Element 4617080 or 4278275 ×2

Technic Connectors 2 pieces

  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Red Part 32530 Element 4207715 or 3253021 ×2

Tiles 2 pieces

  • Tile 1 x 4 with Groove Lime Part 2431 Element 4164021 ×2

Minifig Lower Body 1 piece

  • Hips and Reddish Brown Legs Reddish Brown Part 970c19 Element 4569114 or 4221886 ×1

Minifig Upper Body 1 piece

  • Torso, Sailboat with Sunset Print, Yellow Arms and Hands White Part 973c01h01pr1204 Element 4275606 ×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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