Free tool

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.

Mobile Crane

Checking

955 Mobile Crane

512 pieces in 90 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 153 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 ×4
  • Plate 1 x 6 Black Part 3666 Element 366626 ×4
  • Plate 2 x 3 Black Part 3021 Element 302126 ×8
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×3
  • Plate 1 x 3 Light Gray Part 3623 Element 362302 ×2
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×1
  • Plate 1 x 6 Red Part 3666 Element 366621 ×4
  • Plate 1 x 8 Red Part 3460 Element 346021 ×4
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×8
  • Plate 2 x 4 Red Part 3020 Element 302021 ×3
  • Plate 2 x 6 Red Part 3795 Element 379521 ×3
  • Plate 2 x 8 Red Part 3034 Element 303421 ×2
  • Plate 4 x 12 Red Part 3029 Element 4514717 or 302921 ×1
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×1
  • Plate 4 x 8 Red Part 3035 Element 303521 ×5
  • Plate 6 x 12 Red Part 3028 Element 4617409 or 4288289 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×19
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×6
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×12
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×22
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×6
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×6
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×8
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×7
  • Plate 4 x 10 Yellow Part 3030 Element 4200024 or 4142103 ×3
  • Plate 4 x 12 Yellow Part 3029 Element 302924 ×3
  • Plate 4 x 6 Yellow Part 3032 Element 303224 ×2
  • Plate 4 x 8 Yellow Part 3035 Element 303524 ×1
  • Plate 6 x 10 Yellow Part 3033 Element 303324 ×2

Bricks 75 pieces

  • Brick 1 x 8 Black Part 3008 Element 300826 ×4
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×4
  • Brick 2 x 3 without Cross Supports Black Part 3002a ×4
  • Brick 2 x 4 without Cross Supports Black Part 3001a ×4
  • Brick 2 x 8 Black Part 3007 Element 6037390 or 300726 ×2
  • Brick 1 x 1 Red Part 3005 Element 300521 ×8
  • Brick 1 x 4 Red Part 3010 Element 301021 ×1
  • Brick 1 x 6 Red Part 3009 Element 300921 ×3
  • Brick 1 x 8 Red Part 3008 Element 300821 ×1
  • Brick 1 x 4 Trans-Clear Part 3010 Element 4256588 or 4227529 ×4
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×6
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×14
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×8
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×4
  • Brick 1 x 8 Yellow Part 3008 Element 300824 ×8

Tiles 69 pieces

  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×16
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×16
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×4
  • Tile 2 x 2 with Groove Yellow Part 3068b Element 6388487 or 306824 ×29

Technic Bricks 54 pieces

  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Blue Part 3703 Element 370323 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×3
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×4
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×10
  • Technic Brick 1 x 16 [15 Pin Holes] Yellow Part 3703 Element 370324 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×12
  • Technic Brick 1 x 4 [3 Pin Holes] Yellow Part 3701 Element 370124 ×3
  • Technic Brick 1 x 8 [7 Pin Holes] Yellow Part 3702 Element 370224 ×2

Technic Pins 33 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×5
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×28

Technic Gears 25 pieces

  • Technic Gear 24 Tooth Crown with Flat Teeth Light Gray Part 3650a ×2
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×9
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×12

Technic Axles 21 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×3
  • Technic Axle 2 Black Part 3704 Element 370426 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×10

Technic Bushes 17 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×17

Technic Connectors 13 pieces

  • Technic Axle and Pin Connector Light Gray Part 3651 Element 4105243 or 365102 ×13

Bricks Round and Cones 12 pieces

  • Brick Round 1 x 1 Solid Stud Red Part 3062a ×4
  • Brick Round 1 x 1 Solid Stud White Part 3062a ×8

Bricks Sloped 10 pieces

  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×2
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×8

Wheels and Tyres 10 pieces

  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×4
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×6

Technic Steering, Suspension and Engine 5 pieces

  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×3
  • Technic Universal Joint 4L [Complete Assembly] Light Gray Part 9244 Element 9244 ×2

Bricks Special 4 pieces

  • Brick Special 1 x 1 x 2 with Shutter Holder Yellow Part 3581 Element 4189055 or 358124 ×4

Plates Special 4 pieces

  • Technic Plate 2 x 8 [7 Holes] Red Part 3738 Element 373821 ×2
  • Technic Plate 2 x 8 [7 Holes] Yellow Part 3738 Element 4624216 or 373824 ×2

Windows and Doors 4 pieces

  • Window 1 x 2 x 2 Shutter Black Part 3582 ×4

String, Bands and Reels 2 pieces

  • Rubber Band Small 13mm (Square Cross Section) Black Part 71509 Element 4141606 or 4107153 ×1
  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×1

Hinges, Arms and Turntables 1 piece

  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×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.