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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 (10856) and each piece's element ID, both listed above.
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Duplo Brick 1 x 2 x 2 Log Effect
×2
Duplo Plate 2 x 4
×2
Duplo Brick 1 x 2 x 2
×2
Duplo Brick Round 2 x 2 x 2
×2
Duplo Brick 2 x 4 with Dark Red 'HOME SWEET HOME' on Tan Wood Board Print
×1
Duplo Car Body 2 Top Studs Truck with Cars Tow Mater, Bottom Teeth Print
×1
Duplo Crane Base 2 x 2 with Hook Holder
×1
Duplo Plate 2 x 8
×1
Duplo Roofpiece Slope 33 4 x 4 with Awning Overhang with Chili Lights String Print
×2
Duplo Car Base 2 x 4 with Fixed Axles - 27.5 Silver Wheels and Black Tires
×1
Duplo Hook
×1
Duplo Cone 2 x 2 Square Base
×2
Duplo Brick 2 x 4
×1
Duplo Wrench with Handles
×1
Duplo Brick 1 x 2 x 2 with Car Radio and Speaker Print
×1
Duplo Fuel Container 1 x 2 x 2
×1
Duplo Brick 2 x 2 Slope 45° with Lightning McQueen Print
×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.
