BlockTalk Find Your Set

Free tool

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.

Chicago

Checking

21033 Chicago

444 pieces in 81 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.

3 more look-alike pairs
  • Plate 1 x 3 Black ×7 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
  • Plate 3 x 3 Black ×13 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.
  • Tile 1 x 1 with Groove Black ×5 Dark Bluish Gray ×5 Black is darker than Dark Bluish Gray.
Show

Piece checklist

Plates 205 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box Also in Trans-BrownAlso in Dark Bluish Gray ×6
  • Plate 1 x 10 Black Part 4477 Element 447726 ×7
  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Trans-BrownAlso in Dark Bluish Gray ×14
  • Plate 1 x 3 Black Part 3623 Element 362326 Also in Dark Bluish Gray ×7
  • Plate 1 x 6 Black Part 3666 Element 366626 ×4
  • Plate 2 x 10 Black Part 3832 Element 383226 ×3
  • Plate 2 x 2 Black Part 3022 Element 302226 ×6
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×3
  • Plate 2 x 3 Black Part 3021 Element 302126 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 ×4
  • Plate 2 x 8 Black Part 3034 Element 303426 ×2
  • Plate 3 x 3 Black Part 11212 Element 6174917 Also in Dark Bluish Gray ×13
  • Plate 3 x 3 Cross Black Part 15397 Element 6097283 ×6
  • Plate 4 x 6 Black Part 3032 Element 303226 ×1
  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 1 spare in the box Also in BlackAlso in Trans-Brown ×2
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in BlackAlso in Trans-Brown ×3
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 Also in Black ×1
  • Plate 3 x 3 Dark Bluish Gray Part 11212 Element 6039176 Also in Black ×2
  • Plate 1 x 2 Green Part 3023 Element 302328 ×14
  • Plate 2 x 10 Green Part 3832 Element 383228 ×1
  • Plate 1 x 1 Light Bluish Gray Part 3024 Element 4211399 1 spare in the box ×5
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 1 spare in the box ×4
  • Plate 1 x 1 Trans-Brown Part 3024 Element 6513960 or 6252039 1 spare in the box Also in BlackAlso in Dark Bluish Gray ×22
  • Plate 1 x 2 Trans-Brown Part 3023 Element 6514006 or 6240219 Also in BlackAlso in Dark Bluish Gray ×58
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×2
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×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 ×1

Tiles Special 90 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×48
  • Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Red Part 2412b Element 241221 ×36
  • Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×4

Tiles 58 pieces

  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 1 spare in the box Also in Dark Bluish Gray ×5
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×1
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×4
  • Tile 1 x 8 with 'Chicago' Print Black Part 4162pr0002 Element 6174624 ×1
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 1 spare in the box Also in Black ×5
  • Tile 2 x 2 with Groove Dark Bluish Gray Part 3068b Element 4211055 ×1
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×8
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×5
  • Tile 2 x 2 Corner Light Bluish Gray Part 14719 Element 6065824 ×12
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×4
  • Tile 1 x 4 with Groove Red Part 2431 Element 243121 ×4
  • Tile 1 x 4 with Groove Trans-Light Blue Part 2431 Element 6510178 or 6252049 ×4

Plates Special 40 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×3
  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×4
  • Plate Special 1 x 2 with Handles on Ends Black Part 18649 Element 6099483 ×1
  • Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 1 Support Wall on Bottom Black Part 87609 Element 4653049 ×3
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Dark Tan Part 60478 Element 6135607 ×4
  • Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 1 Support Wall on Bottom Green Part 87609 Element 6000070 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×8
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×1
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×4
  • Bracket 1 x 2 - 2 x 4 Red Part 93274 Element 6118830 or 4616800 ×8
  • Bracket 1 x 2 - 1 x 2 White Part 99781 Element 6552141 or 6548275 ×2

Bricks Sloped 10 pieces

  • Brick Sloped 45° 1 x 1 x 2/3 Quadruple Convex [Pyramid] Tan Part 22388 Element 6249125 or 6177165 1 spare in the box ×4
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate White Part 61409 Element 6552142 or 6023804 ×4
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Yellow Part 61409 Element 4540384 or 4521167 ×2

Bricks 9 pieces

  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×3
  • Brick 1 x 1 x 5 with Solid Stud Yellow Part 2453b Element 6377005 or 6119192 ×1
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×5

Bricks Special 8 pieces

  • Brick Special 1 x 1 Studs on 4 Sides Light Bluish Gray Part 4733 Element 4211511 ×3
  • Brick Special 1 x 1 Studs on 4 Sides White Part 4733 Element 4111971 or 473301 ×1
  • Brick Special 1 x 1 with Stud on 1 Side White Part 87087 Element 6550190 or 4558952 ×2
  • Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×2

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 with Solid Stud Tan Part 6141 Element 4161734 or 614105 1 spare in the box ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×2
  • Plate Round 1 x 1 with Open Stud White Part 85861 Element 6168642 or 4547649 1 spare in the box ×2

Tiles Round and Curved 6 pieces

  • Tile Round 1 x 1 Quarter Light Bluish Gray Part 25269 Element 6176433 1 spare in the box ×2
  • Tile Round 1 x 1 Olive Green Part 98138 Element 6284595 or 6047015 1 spare in the box ×2
  • Tile Round 1 x 1 Trans-Brown Part 98138 Element 6514195 or 6274744 1 spare in the box ×2

Bars, Ladders and Fences 4 pieces

  • Antenna 1 x 4 with Flat Top White Part 3957b Element 6550147 or 395701 ×2
  • Bar 3L White Part 87994 Element 6552205 or 6428803 1 spare in the box ×2

Minifig Accessories 3 pieces

  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 White Part 64644 Element 6615569 or 6070327 ×2
  • Lipstick [Plain] White Part 93094 Element 6528716 or 6189137 1 spare in the box ×1

Hinges, Arms and Turntables 2 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×1
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1

Technic Special 1 piece

  • Technic Ball Joint Metallic Silver Part 32474 Element 6082975 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy