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 Brick 1 x 14 [13 Pin Holes]BlackPart 32018Element 4107558×4
Technic Pin with Friction Ridges Lengthwise and Center SlotsBlackPart 2780Element 4121715 or 2780261 spare in the box×2
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with FrictionBlackPart 47455Element 4272426 or 4213374×10
Dark Red
24 pieces
Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle HolderDark RedPart 30367bElement 4251649×2
Brick Sloped 33° 3 x 1Dark RedPart 4286Element 4650862 or 4168940×6
Brick Sloped 45° 2 x 2Dark RedPart 3039Element 4609925 or 4162216×6
Large Figure Cape, Tattered, 1 HoleDark RedPart 55087Element 4288146×1
Large Figure Foot, with Rotation Joint Ball Half [Vertical Side]Dark RedPart 47430Element 4218217×2
Large Figure Head, Round Top with Vladek, Lord PrintDark RedPart 48819pr0013Element 4256822×1
Large Figure Torso with Vladek, Lord Print Silver Scorpion Relief (Series 3)Dark RedPart 50659c01pr0002×1
Large Figure Weapon Sword, Vladek, Lord (Series 3)Dark RedPart 54291Element 4279311×1
Technic Brick Special 2 x 2 with Axle Hole, Rotation Joint Ball Half [Vertical Side], Vertical Axle Hole EndDark RedPart 47431Element 4218228×2
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Horizontal Top], Rotation Joint SocketDark RedPart 47454Element 4218099×2
Reddish Brown
13 pieces
Brick 1 x 4Reddish BrownPart 3010Element 4211225×1
Brick 2 x 3Reddish BrownPart 3002Element 4216668×2
Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle HoleReddish BrownPart 6222Element 6177805 or 4223681×2
Brick Special 2 x 2 with Pin and Axle HoleReddish BrownPart 6232Element 6442918 or 6195084×2
Brick Wedged, Sloped 2 x 16 TripleReddish BrownPart 30382Element 4290055×1
Plate 2 x 10Reddish BrownPart 3832Element 4211214×2
Plate 4 x 4Reddish BrownPart 3031Element 4243838 or 4225868×3
Pearl Light Gray
10 pieces
Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope EndPearl Light GrayPart 47457Element 4493864 or 4286596×8
Large Figure Shield, 2 x 4 Brick Relief, Vladek Scorpion with Black and Silver PrintPearl Light GrayPart 50657pr0002Element 4495018 or 4287657×1
Weapon Spiked Ball Half with 2 Axle HolesPearl Light GrayPart 54177Element 4494488 or 4277410×1
Dark Bluish Gray
9 pieces
Brick Sloped Inverted 45° 6 x 4 Double with 4 x 4 RecessedDark Bluish GrayPart 30283Element 4212508×1
Plate 2 x 10Dark Bluish GrayPart 3832Element 4210678×2
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top], Rotation Joint SocketDark Bluish GrayPart 47452Element 6021206 or 4636472×2
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Vertical Side], Rotation Joint SocketDark Bluish GrayPart 47432Element 4235573×2
Tile 1 x 2 with GrooveDark Bluish GrayPart 3069bElement 42110521 spare in the box×2
Tan
6 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 41860171 spare in the box×6
Light Bluish Gray
4 pieces
Plate Special 2 x 2 with Pin on BottomLight Bluish GrayPart 2476aElement 6276848 or 4237084×4
Speckle Black-Silver
3 pieces
Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing EndSpeckle Black-SilverPart 47456Element 4287673×2
Large Figure Mask / Visor, Vladek with HornsSpeckle Black-SilverPart 53613Element 4273029×1
Blue
2 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 42064821 spare in the box×2
Trans-Neon Orange
1 piece
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Trans-Neon OrangePart 41669Element 6111281 or 4163574×1
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.