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.
LEGO's request form asks for the set number (31393) and each piece's element ID, both listed above.
As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we earn from qualifying purchases at no extra cost to you. We also earn a commission when you buy from Wicked Brick or BRKOX through our links (Awin).
Clear every mark for this set?
Piece checklist
Dark Bluish Gray
203 pieces
Bracket 1 x 1 - 1 x 2Dark Bluish GrayPart 79389Element 6435043×4
Bracket 1 x 2 - 1 x 2Dark Bluish GrayPart 99781Element 6214341×4
Bracket 1 x 2 - 1 x 4 [Rounded Corners at Bottom, Square Corners at Top]Dark Bluish GrayPart 28802Element 6271127×4
Bracket 5 x 2 x 2 1/3 with Holes, Inside Stud HolderDark Bluish GrayPart 76766Element 6622651×3
Brick 1 x 2Dark Bluish GrayPart 3004Element 4211088×2
Brick Arch 1 x 3Dark Bluish GrayPart 4490Element 4652259 or 4551361×1
Brick Curved 2 x 2 x 2/3Dark Bluish GrayPart 15068Element 6071261×10
Brick Curved 4 x 1 Double, No StudsDark Bluish GrayPart 93273Element 4648256×2
Brick Curved Inverted 2 x 1Dark Bluish GrayPart 24201Element 6215212×4
Brick Sloped 30° 1 x 2 x 2/3Dark Bluish GrayPart 85984Element 4567887×15
Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no studDark Bluish GrayPart 28192Element 6168776×13
Brick Sloped 45° 2 x 1 with Bottom PinDark Bluish GrayPart 3040bElement 4211135×4
Brick Sloped 45° 2 x 2Dark Bluish GrayPart 3039Element 4211054×2
Brick Sloped 45° 2 x 4Dark Bluish GrayPart 3037Element 4211127×2
Brick Sloped Double 45° 1 x 1Dark Bluish GrayPart 35464Element 62620211 spare in the box×16
Brick Special 1 x 1 with Stud on 1 SideDark Bluish GrayPart 87087Element 4558955×8
Brick Special 1 x 2 x 1 1/3 with Rotation Joint SocketDark Bluish GrayPart 80431Element 6398662×4
Brick Wedged, Curved 2 x 1 with Stud Notch LeftDark Bluish GrayPart 29120Element 6204668×10
Brick Wedged, Curved 2 x 1 with Stud Notch RightDark Bluish GrayPart 29119Element 6204667×10
Brick Wedged, Sloped 45° 4 x 2 LeftDark Bluish GrayPart 43721Element 4298580 or 4210870×1
Brick Wedged, Sloped 45° 4 x 2 RightDark Bluish GrayPart 43720Element 4298583 or 4210871×1
Hinge Plate 1 x 2 Locking with 2 Fingers On End, without Groove, 7 TeethDark Bluish GrayPart 54657Element 6267047×2
Plate 1 x 4Dark Bluish GrayPart 3710Element 4211001×3
Plate 1 x 8Dark Bluish GrayPart 3460Element 4210998×4
Plate 2 x 3Dark Bluish GrayPart 3021Element 4211043×14
Plate 3 x 3Dark Bluish GrayPart 11212Element 6039176×1
Plate Round 1 x 1 with Open StudDark Bluish GrayPart 85861Element 62317651 spare in the box×6
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.