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.
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]Light Bluish GrayPart 32054Element 4211865×2
Flat Silver
8 pieces
Large Figure Weapon Lightsaber Hilt Half 2L with Axle HoleFlat SilverPart 21755Element 6121440×8
Pearl Titanium
7 pieces
Large Figure Torso Cover, Armour, RibbedPearl TitaniumPart 20473Element 6122337×1
Large Figure Weapon Claw, Bent and Notched with ClipPearl TitaniumPart 20252Element 6106738×6
Trans-Bright Green
2 pieces
Large Figure Weapon, Lightsaber Blade 16L with Axle HoleTrans-Bright GreenPart 21987Element 6124022×2
Trans-Light Blue
2 pieces
Large Figure Weapon, Lightsaber Blade 16L with Axle HoleTrans-Light BluePart 21987Element 6207743 or 6124025×2
Tick each piece as you find it, or mark it missing.
When a piece really is missing
Ask LEGO
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.
Mark 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.
Keep a record
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.