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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.

Jiaxing Factory

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4000023 Jiaxing Factory

407 pieces in 75 part and color combinations.

LEGO counts 406 pieces. This inventory comes from a separate parts catalog and lists 407; 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.

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

Light Bluish Gray 123 pieces

  • Brick 1 x 1 Light Bluish Gray Part 3005 Element 4211389 ×2
  • Brick 2 x 3 Light Bluish Gray Part 3002 Element 4211386 ×5
  • Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×1
  • Brick Special 1 x 2 with Groove Light Bluish Gray Part 4216 Element 4617170 or 4541224 ×5
  • Hinge Plate 1 x 2 Locking with 1 Finger On End, without Groove Light Bluish Gray Part 44301b Element 6266231 ×12
  • Plate 1 x 1 Light Bluish Gray Part 3024 Element 4211399 ×19
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×8
  • Plate 1 x 3 Light Bluish Gray Part 3623 Element 4211429 or 3623194 ×12
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×7
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×7
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×7
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×8
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×20
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×1
  • Tile 1 x 3 Light Bluish Gray Part 63864 Element 4558169 ×3
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×4

White 82 pieces

  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 Also in Trans-Clear ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 Also in Trans-Clear ×3
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×8
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×7
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) White Part 15573 Element 6550152 or 6051511 ×28
  • Plate Special 1 x 2 with Door Rail White Part 32028 Element 6550168 or 4249563 ×1
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 ×6
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×6
  • Tile 1 x 3 White Part 63864 Element 6552134 or 6548270 ×2
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×3
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×1
  • Tile 2 x 4 with Groove White Part 87079 Element 6548271 or 4560178 ×2

Green 54 pieces

  • Cone 1 x 1 [Top Groove] Green Part 59900 Element 4529239 ×15
  • Plate 1 x 1 Green Part 3024 Element 302428 ×10
  • Plate 1 x 2 Green Part 3023 Element 302328 ×4
  • Plate 1 x 4 Green Part 3710 Element 371028 ×2
  • Plate 1 x 8 Green Part 3460 Element 346028 ×2
  • Plate 2 x 2 Green Part 3022 Element 302228 ×2
  • Plate 2 x 2 Corner Green Part 2420 Element 4157120 or 242028 ×1
  • Plate 2 x 3 Green Part 3021 Element 302128 ×3
  • Plate 2 x 8 Green Part 3034 Element 303428 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Green Part 15573 Element 6092586 ×13
  • Tile 1 x 2 with Groove Green Part 3069b Element 306928 ×1

Trans-Clear 43 pieces

  • Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 Also in White ×26
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 Also in White ×17

Dark Bluish Gray 32 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Bluish Gray Part 15573 Element 6092572 ×3
  • Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 ×9
  • Tile 1 x 2 with Groove Dark Bluish Gray Part 3069b Element 4211052 Also in Black ×6
  • Tile 1 x 4 with Groove Dark Bluish Gray Part 2431 Element 4211053 Also in Black ×6
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 ×3
  • Tile 2 x 4 with Groove Dark Bluish Gray Part 87079 Element 4560184 ×5

Black 20 pieces

  • Plate 1 x 3 Black Part 3623 Element 362326 ×1
  • Plate 4 x 8 Black Part 3035 Element 303526 ×1
  • Plate 6 x 16 Black Part 3027 Element 302726 ×2
  • Plate 8 x 16 Black Part 92438 Element 6094066 ×2
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 Also in Dark Bluish Gray ×2
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 Also in Dark Bluish Gray ×4
  • Tile 1 x 8 with 'Jiaxing Factory 2016' Print Black Part 4162pr0049 Element 6167279 ×1
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×7

Reddish Brown 15 pieces

  • Plate Round 1 x 1 with Solid Stud Reddish Brown Part 6141 Element 4216581 ×15

Red 11 pieces

  • Plate 1 x 1 Red Part 3024 Element 302421 ×4
  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 ×4
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×3

Bright Green 7 pieces

  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Bright Green Part 33291 Element 6170300 or 4619599 ×7

Dark Pink 6 pieces

  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Dark Pink Part 33291 Element 6170298 or 4216479 ×6

Tan 6 pieces

  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×2
  • Plate 2 x 8 Tan Part 3034 Element 4113988 or 303405 ×4

Yellow 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Yellow Part 54200 Element 4504381 or 4283095 ×1
  • Plate 1 x 1 Yellow Part 3024 Element 302424 ×2
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

Blue 2 pieces

  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×2

Lime 1 piece

  • Tile 1 x 1 with Groove Lime Part 3070b Element 4537251 ×1

Trans-Light Blue 1 piece

  • Tile 1 x 1 with Groove Trans-Light Blue Part 3070b Element 6514261 or 6254256 ×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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