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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.
LEGO's request form asks for the set number (30583) and each piece's element ID, both listed above.
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Bracket 1 x 2 - 2 x 2 Inverted
×3
Brick 1 x 1
×4
Brick Curved 1 x 2 x 1 1/3 with Curved Top
×4
Plate 2 x 4
×1
Plate Special 1 x 2 with Handle on End [Closed Ends]
×4
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud]
×1
Tile Special 1 x 1 with Clip with Rounded Edges
×4
Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs
×4
Brick Curved 1 x 2 x 1 1/3 with Curved Top
×2
Brick Curved 2 x 2 x 2/3
×1
Brick Special 1 x 1 with Studs on 2 Adjacent Sides
×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]
×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)
×1
Tile Round 1 x 1 with Offset Black Eye Print
1 spare in the box
×2
Wedge Plate 2 x 2 Cut Corner
×4
Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip]
×2
Wedge Plate 2 x 2 Cut Corner
×4
Brick Curved 1 x 2 x 1 No Studs
×4
Brick Curved 2 x 1 No Studs [1/2 Bow]
×4
Brick Curved 2 x 1 No Studs [1/2 Bow]
×4
Plate 1 x 2
×4
Brick 2 x 2
×1
Brick Curved Inverted 2 x 1
×2
Tile Round 1 x 1 Quarter
1 spare in the box
×3
Bracket 1 x 2 - 2 x 2
×2
Plate 2 x 2
×2
Plate Special 2 x 2 x 2/3 with Axle Hole and Grill on Sides (Haybale)
×1
Plate 1 x 2
×1
Tile 2 x 2 with Groove
×1
Equipment Paint Brush with Full Orange Tip Pattern
1 spare in the box
×1
Tick each piece as you find it, or mark it missing.
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 LEGOMark 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.
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.
