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The Workshop Sheet 10 of 21

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Lego Dragon

Checking

3724 Lego Dragon

1,535 pieces in 67 part and color combinations.

LEGO counts 1,530 pieces. This inventory comes from a separate parts catalog and lists 1,535; the two do not always count the same elements, so their totals differ. 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

Green 1,386 pieces

  • Brick 1 x 1 Green Part 3005 Element 300528 ×19
  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×69
  • Brick 1 x 3 Green Part 3622 Element 4109679 or 362228 ×49
  • Brick 1 x 4 Green Part 3010 Element 4112838 or 301028 ×51
  • Brick 1 x 6 Green Part 3009 Element 4111844 or 300928 ×38
  • Brick 2 x 2 Green Part 3003 Element 300328 ×29
  • Brick 2 x 2 Corner Green Part 2357 Element 4125281 or 4112544 ×142
  • Brick 2 x 3 Green Part 3002 Element 4109674 or 300228 ×101
  • Brick 2 x 4 Green Part 3001 Element 4106356 or 300128 ×79
  • Brick 2 x 6 Green Part 2456 Element 4181135 or 4142867 ×52
  • Brick 2 x 8 Green Part 3007 Element 4513287 or 4141384 ×48
  • Brick Sloped 45° 2 x 1 with Bottom Pin Green Part 3040b Element 4121969 or 4109668 ×6
  • Brick Sloped 45° 2 x 2 Green Part 3039 Element 303928 ×6
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] - Red Top Green Part 73983c01 Element 4157106 ×2
  • Plate 1 x 1 Green Part 3024 Element 302428 ×91
  • Plate 1 x 2 Green Part 3023 Element 302328 ×97
  • Plate 1 x 3 Green Part 3623 Element 4107758 or 362328 ×56
  • Plate 1 x 4 Green Part 3710 Element 371028 ×57
  • Plate 1 x 6 Green Part 3666 Element 366628 ×33
  • Plate 1 x 8 Green Part 3460 Element 346028 ×2
  • Plate 2 x 2 Green Part 3022 Element 302228 ×37
  • Plate 2 x 2 Corner Green Part 2420 Element 4157120 or 242028 ×90
  • Plate 2 x 3 Green Part 3021 Element 302128 ×74
  • Plate 2 x 4 Green Part 3020 Element 302028 ×70
  • Plate 2 x 6 Green Part 3795 Element 379528 ×59
  • Plate 2 x 8 Green Part 3034 Element 303428 ×9
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Green Part 4032a Element 403228 ×8
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Green Part 3794a ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Green Part 3700 Element 6230235 or 4519977 ×4
  • Tile 1 x 1 with Groove Green Part 3070b Element 4558593 or 4238528 1 spare in the box ×4

Red 108 pieces

  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 3 Red Part 3622 Element 362221 ×3
  • Brick 1 x 4 Red Part 3010 Element 301021 ×2
  • Brick 1 x 6 Red Part 3009 Element 300921 ×3
  • Brick 1 x 8 Red Part 3008 Element 300821 ×6
  • Brick Sloped 33° 3 x 1 Red Part 4286 Element 428621 ×4
  • Brick Sloped 45° 2 x 1 Double with Ovoid Bottom Pin Red Part 3044b Element 304421 ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×12
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×15
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] - Green Top Red Part 73983c02 Element 4157107 ×2
  • Plate 1 x 1 Red Part 3024 Element 302421 ×22
  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 1 x 3 Red Part 3623 Element 362321 ×6
  • Plate 1 x 4 Red Part 3710 Element 371021 ×11
  • Plate 1 x 6 Red Part 3666 Element 366621 ×8
  • Plate 2 x 3 Red Part 3021 Element 302121 ×1
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate 2 x 6 Red Part 3795 Element 379521 ×3

White 18 pieces

  • Antenna 1 x 4 with Rounded Top White Part 3957a ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×2
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×2
  • Cone 1 x 1 [No Top Groove] White Part 4589 Element 458901 ×2
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) White Part 3794a ×4
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2

Black 8 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×4
  • Plate 1 x 1 Black Part 3024 Element 302426 ×2

Blue 8 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×2
  • Plate 1 x 1 Blue Part 3024 Element 302423 ×2
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
  • Tile 1 x 1 with Groove Blue Part 3070b Element 4206330 or 307073 1 spare in the box ×2

Light Gray 4 pieces

  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×2

Trans-Clear 2 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2

Tan 1 piece

  • Baseplate 32 x 32 Tan Part 3811 Element 4558611 or 4219688 ×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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