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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 (10594) and each piece's element ID, both listed above.
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Duplo Plate 2 x 8
×2
Duplo Plate 4 x 8
×1
Duplo Brick 2 x 2
×2
Duplo Container Box 2 x 4 (Horse Trough New Style)
×1
Duplo Plant, Flower with 1 Top Stud
×2
Duplo Brick 2 x 2
×4
Duplo Brick 2 x 2 Slope 45°
×2
Duplo Brick 2 x 6 x 2 Curved with 2 x 2 Cutout on Bottom
×1
Duplo Animal Horse with one Stud and Raised Hoof with Wings and Magenta Mane & Tail Print
×1
Duplo Brick 1 x 2 x 2
×4
Duplo Brick 2 x 2
×4
Duplo Door Frame 2 x 4 x 5
×1
Duplo Brick 2 x 2 with 4 Carrots Print
×1
Duplo Brick 1 x 2 x 2 Log Effect
×2
Duplo Door / Lid, Wood Effect
×1
Duplo Pitchfork
×1
Duplo Brick 2 x 2 x 2 Curved Top with Coat of Arms Flying Horse Print
×1
Duplo Brick Round 2 x 2 x 2
×2
Duplo Fence 1 x 6 x 2 Paled (Picket)
×3
Duplo Plate 4 x 8
×1
Duplo Figure Child, Hair with Bangs Dark Orange and Lavender Diadem, Medium Lavender Legs, Necklace over Lavender Top (Princess Sofia)
×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.
