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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.

Sonic Stinger with Promotional Mask

Checking

6909 Sonic Stinger with Promotional Mask

92 pieces in 48 part and color combinations, plus 1 minifigure.

The piece count includes the 5 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

Plates 19 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 2 x 10 Black Part 3832 Element 383226 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Plate 1 x 1 Blue Part 3024 Element 302423 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×1
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×2
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×6
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
  • Plate 2 x 2 Corner Blue Part 2420 Element 242073 or 242023 ×2
  • Plate 1 x 2 Dark Gray Part 3023 Element 4111983 or 302327 ×1

Bricks Sloped 16 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper Black Part 4287a ×4
  • Brick Sloped 33° 3 x 1 Blue Part 4286 Element 428623 ×4
  • Brick Sloped Inverted 45° 2 x 1 Blue Part 3665 Element 366523 ×2
  • Brick Sloped 45° 2 x 1 with Bottom pin, with Black Crosshairs and Green Insectoid Print Dark Gray Part 3040bpr0012 Element 4121977 or 4114639 ×2

Hinges, Arms and Turntables 10 pieces

  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×2
  • Hinge Brick 1 x 2 Top Plate Thin Blue Part 3938 Element 4279389 or 393823 ×2
  • Arm Holder Brick 1 x 2 with 2 Horizontal Fingers Dark Gray Part 30014 Element 4114442 ×2
  • Arm Piece 90° Turn [2 / 3 Fingers] Dark Gray Part 412 Element 4114443 ×2
  • Wing Insectoid Large with Arm Hinge and Circuitry Print Left (Print on Top, Tip on Left, Logo at Back Edge) Trans-Dark Blue Part 30230pr0001 Element 4114643 ×1
  • Wing Insectoid Large with Arm Hinge and Circuitry Print Right (Print on Top, Tip on Right, Logo at Back Edge) Trans-Dark Blue Part 30230pr0002 Element 4114642 ×1

Bricks Round and Cones 6 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Neon Green Part 4589 Element 618849 or 458949 ×4
  • Dome Hemisphere 4 x 4 Multifaceted Trans-Neon Green Part 30208 Element 6031104 or 4114690 ×2

Plates Special 6 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Blue Part 4081b Element 6281991 or 4632567 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Blue Part 3794a ×2
  • Plate Special 1 x 2 with 4 x 4 disk at 90 degrees Dark Gray Part 30209 Element 4114692 ×2

Bars, Ladders and Fences 5 pieces

  • Antenna 8H Whip Black Part 2569 Element 6265148 or 6164379 ×1
  • Antenna 8H Whip Trans-Neon Green Part 2569 Element 6265159 or 6164380 ×4

Tiles Special 5 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Black Part 2555 Element 255526 ×5

Supports, Girders and Cranes 4 pieces

  • Support Leg Small [Insectoids] Dark Gray Part 30211 Element 4114696 ×4

Transportation - Sea and Air 4 pieces

  • Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders] Black Part 3475b Element 347526 ×2
  • Engine, Strakes, 2 x 2 Thin Top Plate Black Part 4229 Element 4552040 or 4163480 ×1
  • Tail 4 x 2 x 2, Rocket Black Part 4746 Element 4164411 or 474626 ×1

Plates Round Curved and Dishes 3 pieces

  • Dish 2 x 2 Inverted [Radar] Trans-Neon Green Part 4740 Element 6245297 or 4112517 ×3

Bricks Special 2 pieces

  • Brick Special 1 x 2 x 2/3 with Studs on Sides Black Part 4595 Element 6681661 or 4523339 ×1
  • Brick Special 1 x 2 with Pin Blue Part 2458 Element 245823 ×1

Magnets and Holders 2 pieces

  • Magnet Cylindrical Black Part 73092 Element 73092 ×1
  • Magnet Holder 2 x 3 Dark Gray Part 2607 Element 4111984 ×1

Minifig Accessories 2 pieces

  • Equipment Space Scanner Black Part 30035 Element 4248831 or 4143705 ×2

Tubes and Hoses 2 pieces

  • Flexible Hose 8.5L with Tabbed Ends (Ends same color as Tube) Black Part 73590c02a Element 4540890 or 621130 ×2

Electronics 1 piece

  • Light and Sound Unit, Insectoid Tail 4 x 20 x 3 Dark Gray Part 71603 Element 4111802 ×1

Gear Parts 1 piece

  • Play Gear, Mask, Hard Plastic, Insectoids Black Part upn0176 ×1

Plates Wedged 1 piece

  • Wedge Plate 3 x 4 without Stud Notches Blue Part 4859 ×1

Rock 1 piece

  • Rock 2 x 2 Crystal 3 Point Trans-Neon Green Part 30213 Element 4114434 ×1

Stickers 1 piece

  • Sticker Sheet for Sets 2964-1, 2965-1, 5316-1, 6817-1, 6837-1, 6903-1, 6905-1, 6907-1, 6909-1, 6919-1, 6969-1, 6977-1 [No Color/Any Color] Part stickerupn0038 Element 4114700 ×1

Tiles 1 piece

  • Tile 2 x 2 with Insectoid Logo in Triangle Print Black Part 3068bpr0353 Element 4114641 ×1

Minifigures 1 figure

  • Gypsy Moth / Navigator Sharp with Shoulder Armor 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

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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