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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.
Checking
21 pieces in 15 part and color combinations, plus 1 minifigure.
LEGO counts 20 pieces. This inventory comes from a separate parts catalog and lists 25, including the 4 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
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 (9572) and each piece's element ID, both listed above.
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Trading Card, Ninjago Deck #2: 16 - NRG Cole - North American Version
×2
Trading Card, Ninjago Deck #2: 36 - Provoke Anger - North American Version
×2
Trading Card, Ninjago Deck #2: 81 - Snake Quake - North American Version
×2
Trading Card, Ninjago Deck #2: 85 - Master Archer! - North American Version
×2
Trading Card, Ninjago Deck #2: 90 - Sensei's Teatime - North American Version
×2
Weapon Lightsaber Hilt with Bottom Ring
×1
Weapon Scythe / Crescent Blade Serrated with Bar
×1
Weapon Pike / Spear Round End
×1
Bar 4L (Lightsaber Blade / Wand)
×1
Bar 6L with Stop Ring
×1
Brick 1 x 2 without Bottom Tube
×2
Turntable 6 x 6 Round Flat Silver Base Serrated with Red Energy Print (Ninjago Spinner)
×1
Ring 4 x 4 with 2 x 2 Hole and 4 Serrated Ends with Black and Silver Print (Ninjago Spinner Crown)
×1
Plate 2 x 2
×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]
×1
Cole NRG
×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.
