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.
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.
Bracket 1 x 2 - 2 x 2 InvertedBlack ×3Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Brick 1 x 1Black ×1Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Brick 1 x 2 x 2 with Inside Stud HolderBlack ×2Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Brick Special 1 x 4 with 4 Studs on One SideBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate 1 x 1Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 2Black ×5Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
7 more look-alike pairs
Plate 1 x 4Black ×13Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate 2 x 2Black ×5Dark Bluish Gray ×15Black is darker than Dark Bluish Gray.
Plate 2 x 2 CornerBlack ×10Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated VersionBlack ×8Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 3 Support Walls on BottomBlack ×7Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Black ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Tile Round 1 x 1 QuarterBlack ×2Dark Bluish Gray ×9Black is darker than Dark Bluish Gray.
LEGO's request form asks for the set number (72042) and each piece's element ID, both listed above.
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Piece checklist
Plates
258 pieces
Plate 1 x 1BlackPart 3024Element 3024261 spare in the boxAlso in Dark Bluish Gray×2
Plate 1 x 10BlackPart 4477Element 447726×3
Plate 1 x 2BlackPart 3023Element 302326Also in Dark Bluish Gray×5
Plate 1 x 3BlackPart 3623Element 362326×1
Plate 1 x 4BlackPart 3710Element 371026Also in Dark Bluish Gray×13
Plate 1 x 6BlackPart 3666Element 366626×2
Plate 2 x 2BlackPart 3022Element 302226Also in Dark Bluish Gray×5
Plate 2 x 2 CornerBlackPart 2420Element 242026Also in Dark Bluish Gray×10
Plate 2 x 4BlackPart 3020Element 302026×6
Plate 3 x 3 CornerBlackPart 77844Element 6439175×1
Plate 1 x 10BluePart 4477Element 447723×2
Plate 1 x 2BluePart 3023Element 302323×5
Plate 1 x 6BluePart 3666Element 366623×2
Plate 1 x 2Bright GreenPart 3023Element 6343326 or 6014491×8
Plate 1 x 2Bright PinkPart 3023Element 4654128 or 4245303×1
Plate 2 x 2Bright PinkPart 3022Element 6096589 or 4245314×1
Plate 1 x 1Dark Bluish GrayPart 3024Element 42107191 spare in the boxAlso in Black×2
Plate 1 x 2Dark Bluish GrayPart 3023Element 4211063Also in Black×6
Plate 1 x 4Dark Bluish GrayPart 3710Element 4211001Also in Black×1
Plate 1 x 5Dark Bluish GrayPart 78329Element 6413109×2
Plate 1 x 8Dark Bluish GrayPart 3460Element 4210998×1
Plate 2 x 2Dark Bluish GrayPart 3022Element 4211094Also in Black×15
Plate 2 x 2 CornerDark Bluish GrayPart 2420Element 4210635Also in Black×2
Plate 2 x 3Dark Bluish GrayPart 3021Element 4211043×6
Plate 2 x 8Dark Bluish GrayPart 3034Element 4210997×2
Plate 4 x 4Dark Bluish GrayPart 3031Element 4243831 or 4211089×1
Plate 1 x 3Dark GreenPart 3623Element 6618081 or 6013975×4
Plate 1 x 1 x 2/3 with Open StudDark PinkPart 86996Element 6555320×2
Plate 1 x 4Dark PinkPart 3710Element 6161222 or 6015823×2
Plate 2 x 2Dark PinkPart 3022Element 6549101 or 6109153×1
Plate 2 x 6Dark PinkPart 3795Element 6289701 or 6173746×1
Plate 1 x 3Dark PurplePart 3623Element 6035470 or 4224859×1
Plate 2 x 2Dark RedPart 3022Element 4585479 or 4163160×2
Plate 1 x 10GreenPart 4477Element 6467868 or 6004926×1
Plate 1 x 2GreenPart 3023Element 302328×22
Plate 1 x 6GreenPart 3666Element 366628×4
Plate 2 x 10GreenPart 3832Element 383228×2
Plate 2 x 2 CornerGreenPart 2420Element 4157120 or 242028×2
Plate 2 x 3GreenPart 3021Element 302128×3
Plate 2 x 4GreenPart 3020Element 302028×1
Plate 6 x 8GreenPart 3036Element 4507311 or 303678×1
Plate 1 x 10Light Bluish GrayPart 4477Element 4251149 or 4211495×2
Plate 1 x 3Light Bluish GrayPart 3623Element 4211429 or 3623194×10
Plate 2 x 2 CornerLight Bluish GrayPart 2420Element 4211353×2
Plate 6 x 8Light Bluish GrayPart 3036Element 4211408×1
Plate 1 x 1LimePart 3024Element 4621557 or 45614801 spare in the box×1
Plate 1 x 2LimePart 3023Element 4164037 or 4122439×4
Plate 2 x 2LimePart 3022Element 4613977 or 4537937×4
Plate 1 x 1OrangePart 3024Element 4524929 or 42034541 spare in the box×8
Plate 1 x 4OrangePart 3710Element 4118782×2
Plate 1 x 1Pearl GoldPart 3024Element 60698871 spare in the box×4
Plate 1 x 4RedPart 3710Element 371021×1
Plate 1 x 4Reddish BrownPart 3710Element 4211190×2
Plate 1 x 1TanPart 3024Element 4159553 or 3024051 spare in the box×2
Plate 1 x 2TanPart 3023Element 4113917 or 302305×19
Plate 1 x 4TanPart 3710Element 4113233 or 371005×4
Plate 1 x 6TanPart 3666Element 4124067 or 366605×3
Plate 2 x 2TanPart 3022Element 4114084 or 302205×17
Plate 2 x 4TanPart 3020Element 4114309 or 302005×3
Plate 2 x 6TanPart 3795Element 4113993 or 379505×1
Plate 1 x 1 x 2/3 with Open StudWhitePart 86996Element 6383985×2
Plate 1 x 2WhitePart 3023Element 6552100 or 6548261×6
Plate 2 x 4WhitePart 3020Element 6552098 or 302001×1
Plate 6 x 10WhitePart 3033Element 4528341 or 303301×2
Plate 1 x 10YellowPart 4477Element 6079138 or 6078095×2
Plate 1 x 3YellowPart 3623Element 362324×1
Plates Special
147 pieces
Bracket 1 x 2 - 1 x 2BlackPart 99781Element 6016172×2
Bracket 1 x 2 - 2 x 2 InvertedBlackPart 99207Element 6000650Also in Dark Bluish Gray×3
Bracket 2 x 2 with 1 x 2 Vertical StudsBlackPart 41682Element 6250020×2
Plate Special 1 x 2 [Side Handle Closed Ends]BlackPart 48336Element 4225201×4
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)BlackPart 15573Element 6092585×8
Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm]BlackPart 88072Element 6261348 or 4569733×2
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated VersionBlackPart 4304Element 6469445Also in Dark Bluish Gray×8
Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 3 Support Walls on BottomBlackPart 72132Element 6401209Also in Dark Bluish Gray×7
Plate Special 4 x 4 with 2 x 2 OpeningBlackPart 64799Element 6058118×1
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)BlackPart 18674Element 6195325Also in Dark Bluish Gray×2
Technic Plate 2 x 8 [7 Holes]BlackPart 3738Element 373826×2
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated VersionBluePart 4304Element 6469450×2
Bracket 1 x 2 - 1 x 2Bright PinkPart 99781Element 6353189×1
Bracket 1 x 2 - 2 x 2 InvertedBright PinkPart 99207Element 6288181×3
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)Bright PinkPart 15573Element 6264994×2
Bracket 1 x 1 - 1 x 1 InvertedDark Bluish GrayPart 36840Element 6225494×2
Bracket 1 x 2 - 2 x 2 InvertedDark Bluish GrayPart 99207Element 6308045Also in Black×2
Plate Special 1 x 2 with Clips Horizontal [Open O Clips]Dark Bluish GrayPart 60470bElement 6350292×2
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Dark Bluish GrayPart 87580Element 6126083 or 4565322×1
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated VersionDark Bluish GrayPart 4304Element 6469463Also in Black×4
Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 3 Support Walls on BottomDark Bluish GrayPart 72132Element 6401210Also in Black×1
Plate Special 3 x 2 with Rounded End, HoleDark Bluish GrayPart 3176Element 4225733×1
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Dark Bluish GrayPart 18674Element 6115080Also in Black×6
Plate Special 2 x 2 with Only 2 studsDark GreenPart 33909Element 6484031×6
Plate Special 1 x 1 Rounded with HandleDark PinkPart 26047Element 6423953×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)Dark PurplePart 15573Element 6092604×5
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Dark PurplePart 18674Element 6261501×4
Plate Special 10 x 10 Octagonal with HoleDark TanPart 89523Element 6288246 or 4584485×1
Plate Special 2 x 2 with Only 2 studsGreenPart 33909Element 6505153×1
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated VersionGreenPart 4304Element 6470191×4
Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib]Light Bluish GrayPart 10247Element 6045988×12
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.
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.