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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.

Twinblade Adventures

Checking

31020 Twinblade Adventures

216 pieces in 79 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 77 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×13
  • Plate 2 x 3 Black Part 3021 Element 302126 Also in Dark Blue ×2
  • Plate 2 x 3 Dark Blue Part 3021 Element 6554192 or 4530028 Also in Black ×4
  • Plate 2 x 4 Dark Blue Part 3020 Element 6554194 or 4667595 ×2
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×7
  • Plate 1 x 6 Dark Bluish Gray Part 3666 Element 4211056 ×2
  • Plate 2 x 10 Dark Bluish Gray Part 3832 Element 4210678 ×1
  • Plate 2 x 2 Corner Dark Bluish Gray Part 2420 Element 4210635 ×2
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×6
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×1
  • Plate 4 x 4 Light Bluish Gray Part 3031 Element 4243797 or 4211403 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 1 x 3 Red Part 3623 Element 362321 ×2
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×3
  • Plate 2 x 8 Red Part 3034 Element 303421 ×1
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×1
  • Plate 1 x 2 Trans-Yellow Part 3023 Element 6514002 or 6240211 ×3
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×2
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×4
  • Plate 1 x 1 Yellow Part 3024 Element 302424 1 spare in the box ×6

Plates Round Curved and Dishes 25 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×3
  • Plate Round 1 x 1 with Solid Stud Flat Silver Part 6141 Element 4633691 1 spare in the box ×18
  • 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 ×2

Plates Special 19 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×4
  • Plate Special 1 x 2 with Door Rail Black Part 32028 Element 4107761 ×4
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×2
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Light Bluish Gray Part 60478 Element 4515369 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Light Bluish Gray Part 10247 Element 6045988 ×2
  • Bracket 1 x 2 - 2 x 2 Red Part 44728 Element 6117974 or 6048856 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] White Part 99206 Element 6046979 ×1

Bricks Sloped 12 pieces

  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Dark Bluish Gray Part 3660 Element 4211000 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Light Bluish Gray Part 3747b Element 4211570 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Red Part 85984 Element 4651524 ×2
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Red Part 4287b ×4
  • Brick Sloped 45° 3 x 4 Double / 33° White Part 4861 Element 486101 ×1

Tiles 12 pieces

  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×6
  • Tile 2 x 4 with Groove Dark Blue Part 87079 Element 4569836 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×2

Plates Wedged 11 pieces

  • Wedge Plate 4 x 2 Left Dark Blue Part 41770 Element 4529954 or 4247065 ×2
  • Wedge Plate 4 x 2 Right Dark Blue Part 41769 Element 4502091 or 4247066 ×2
  • Wedge Plate 2 x 4 Light Bluish Gray Part 51739 Element 4507056 or 4252368 ×1
  • Wedge Plate 3 x 2 Left Red Part 43723 Element 4372321 or 4180533 ×1
  • Wedge Plate 3 x 2 Right Red Part 43722 Element 4372221 or 4180504 ×1
  • Wedge Plate 2 x 4 White Part 51739 Element 6552128 or 4249506 ×2
  • Wedge Plate 3 x 3 Cut Corner White Part 2450 Element 6601842 or 4280148 ×2

Bricks 10 pieces

  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 4 Red Part 3010 Element 301021 ×4
  • Brick 1 x 2 without Bottom Tube Trans-Brown Part 3065 Element 6514267 or 6244909 ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×2

Bricks Round and Cones 10 pieces

  • Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 ×2
  • Cone 1 x 1 [Top Groove] Light Bluish Gray Part 59900 Element 4529241 ×8

Bricks Curved 9 pieces

  • Brick Curved 2 x 4 x 1 1/3 Dark Bluish Gray Part 6081 Element 4210968 ×2
  • Brick Curved 4 x 2 No Studs Light Bluish Gray Part 93606 Element 4622742 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Red Part 11477 Element 6029946 ×4
  • Brick Curved 2 x 2, Two Top Studs Red Part 30165 Element 4521852 or 4142112 ×1

Technic Bricks 6 pieces

  • Technic Brick 1 x 1 with Pin Hole Light Bluish Gray Part 6541 Element 4211535 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×2

Bricks Special 4 pieces

  • Brick Special 1 x 1 with Headlight Dark Bluish Gray Part 4070 Element 4211044 ×2
  • Brick Special 1 x 2 with Grille Dark Bluish Gray Part 2877 Element 4210636 ×2

Tiles Special 4 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×3
  • Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Dark Bluish Gray Part 30350b Element 4227517 ×1

Technic Pins 3 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×1

Transportation - Land 3 pieces

  • Wheel Holder, Plate, Round 2 x 2 Thin with Clips Light Bluish Gray Part 2655 Element 6152344 or 4211373 ×3

Wheels and Tyres 3 pieces

  • Wheel Skateboard / Trolley Black Part 2496 Element 6223673 or 4569104 ×3

Technic Axles 2 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×2

Technic Bushes 2 pieces

  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×2

Technic Special 2 pieces

  • Technic Plate Rotor 3 Blade with Smooth Ends and 6 Studs (Propeller) Light Bluish Gray Part 32125 Element 4262978 or 4211842 ×2

Bricks Wedged 1 piece

  • Brick Wedged, Curved 6 x 4 Triple White Part 43712 Element 4179869 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 3 x 4 x 1 1/3 with 2 Studs on Top Trans-Brown Part 2437 Element 6507913 or 6253360 ×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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