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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 (10847) and each piece's element ID, both listed above.
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Duplo Brick 2 x 2 x 2 with Medium Blue '4' Print
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Duplo Brick 2 x 4 Curved Top
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Duplo Car Base 2 x 6 with Fake Bolts, Open Hitch End and Red Wheels
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Duplo Brick 2 x 2 x 2 with Bright Light Orange '7' Print
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Duplo Brick 2 x 4 Curved Top
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Duplo Car Base 2 x 6 with Fake Bolts, Open Hitch End and Red Wheels
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Duplo Train Front, Steam Engine 2 x 4 with Cow Catcher and Yellow Headlight above Red Boiler Circle with Yellow '1' Print
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Duplo Brick 2 x 2 x 2 with Blue '2' Print
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Duplo Brick 2 x 4 Curved Top
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Duplo Car Base 2 x 6 with Fake Bolts, Open Hitch End and Red Wheels
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Duplo Brick 2 x 2 x 2 with Green '0' Print
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Duplo Brick 2 x 2 x 2 with Green '8' Print
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Duplo Backhoe / Train Cabin Roof
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Duplo Brick 2 x 2 x 2 with Lime '1' Print
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Duplo Brick 2 x 2 x 2 with Orange '3' Print
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Duplo Train Cabin 3 x 3 x 3 1/2 Large Side Windows [Plain]
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Duplo Animal Cat / Kitten Sitting with Black Eyes and Whiskers and White Chest and Nose Print
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Duplo Figure Child, Hair Combed Forward with Curl Reddish Brown, Red Legs, White Sleeves and Red Car Print
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Duplo Brick 2 x 2 x 2 with Yellow '5' Print
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Duplo Figure Child with Ponytails and Bangs Black, with Red Legs, Nougat Face and Hands, Bow Print
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Duplo Brick 2 x 2 x 2 with Red '6' Print
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Duplo Brick 2 x 2 x 2 with Orange '9' Print
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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.
