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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.

Research Glider

Checking

5921 Research Glider

53 pieces in 35 part and color combinations, plus 1 minifigure.

The official piece count includes the 4 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

Light Gray 12 pieces

  • Brick 2 x 2 Light Gray Part 3003 Element 4103591 or 300352 ×1
  • Brick 2 x 4 Light Gray Part 3001 Element 4116259 or 300102 ×5
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Gray Part 3040b Element 4121933 or 304002 ×2
  • Chain 17L [21 Links] Light Gray Part 30104 Element 4113265 ×1
  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×1
  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Light Gray Part 32064b ×1

Black 8 pieces

  • Bar 6.6L with Stop Ring [Umbrella Stand] Black Part 4095 Element 409526 ×1
  • Brick 2 x 3 Black Part 3002 Element 300226 ×1
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×1
  • Hinge Brick 1 x 2 Top Plate Thin Black Part 3938 Element 393826 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Tap 1 x 1 with Hole in Spout Black Part 4599a ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×1

Brown 8 pieces

  • Brick 1 x 2 Brown Part 3004 Element 300425 ×2
  • Brick 2 x 2 Brown Part 3003 Element 4140745 or 300325 ×3
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Brown Part 3684 Element 4248064 or 4143984 ×1
  • Propeller 3 Blade 5.5 Diameter with Hole for Technic Pin Brown Part 4617b Element 4187279 or 4113913 ×1
  • Wedge Plate 3 x 6 Cut Corners Brown Part 2419 Element 4129970 or 241925 ×1

Green 7 pieces

  • Brick 2 x 3 Green Part 3002 Element 4109674 or 300228 ×2
  • Plant, Leaves 4 x 3 Green Part 2423 Element 6268814 or 242328 ×2
  • Plant, Leaves 6 x 5 Green Part 2417 Element 6266968 or 4613823 ×2
  • Plate 6 x 6 Green Part 3958 Element 6097194 or 4626001 ×1

Red 6 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Red Part 6091 Element 6184782 or 609121 ×2
  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×2
  • Brick Special 1 x 2 with Vertical Clip [Thick U Clip] Red Part 30237a ×2

Dark Gray 4 pieces

  • Brick 2 x 6 Dark Gray Part 2456 Element 4181136 or 4114252 ×2
  • Brick Special 1 x 2 with Pin Dark Gray Part 2458 Element 4113907 or 245827 ×1
  • Plate 2 x 8 Dark Gray Part 3034 Element 303427 ×1

Trans-Clear 3 pieces

  • Panel 1 x 2 x 1 [Square Corners] Trans-Clear Part 4865a Element 4113106 ×1
  • Sail, Triangular, 6 x 12 with Tattered with Patched Cloth Print Trans-Clear Part 71637pr0001 Element 4114439 ×2

White 3 pieces

  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box ×2
  • Weapon Lance White Part 3849 Element 384901 ×1

Tan 2 pieces

  • Animal, Dinosaur, Pteranodon Tan Part 30478 Element 4140746 ×1
  • Tile Round 2 x 2 with Bottom Cross Tan Part 4150 Element 4129501 or 415005 ×1

Minifigures 1 figure

  • Mike 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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