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.
1,008 pieces in 253 part and color combinations, plus 9 minifigures.
The official piece count includes the 74 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.
Before you call it missing
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Plate Round 1 x 1 with Solid StudDark Bluish Gray ×12Flat Silver ×10Dark Bluish Gray is darker than Flat Silver.
Tile Special 1 x 2 Grille with Bottom GrooveDark Bluish Gray ×10Flat Silver ×16Dark Bluish Gray is darker than Flat Silver.
Plate Round 1 x 1 with Solid StudLight Bluish Gray ×8Flat Silver ×10Light Bluish Gray is lighter than Flat Silver.
Brick Special 1 x 2 with GrilleBlack ×3Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Hinge Plate 1 x 2 Locking with 2 Fingers On End, without Groove, 7 TeethBlack ×8Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate 4 x 4Black ×4Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
4 more look-alike pairs
Plate 6 x 8Black ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudBlack ×2Dark Bluish Gray ×12Black is darker than Dark Bluish Gray.
Technic Beam 1 x 2 ThinBlack ×8Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Brick 1 x 1 with Pin HoleBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Equipment Cup / Mug [Plain]Flat SilverPart 3899Element 6236213×1
Tap 1 x 1 without Hole in SpoutLight Bluish GrayPart 4599bElement 42115031 spare in the box×1
Equipment Space Binoculars / Scanner / ElectrobinocularsWhitePart 30304Element 6359936 or 6122729×1
Projectiles / Launchers
4 pieces
Launcher Trigger, Weapon Gun TriggerDark Bluish GrayPart 69755Element 63606751 spare in the box×2
Launcher, Plate Special 1 x 2 with Mini Blaster SquareLight Bluish GrayPart 69754Element 6360382×2
Transportation - Land
2 pieces
Wheel Arch, Curved Wedge 4 x 3 with 2 x 2 Opening and 4 StudsLight Bluish GrayPart 47755Element 6381293 or 6005667×1
Seat / Chair 2 x 2TanPart 4079Element 6219785 or 407905×1
Windows and Doors
2 pieces
Door Frame 1 x 4 x 4, no HolesBlackPart 40527Element 6254519×2
Containers
1 piece
Container Box 2 x 2 x 2 - Top OpeningDark Bluish GrayPart 61780Element 4520307×1
Stickers
1 piece
Sticker Sheet for Set 75337-1[No Color/Any Color]Part 10100763Element 6410025×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
9 figures
Battle Droid, One Bent Arm, One Straight ArmMinifigure, checked as a whole figure×3
Clone Commander Cody - Orange VisorMinifigure, checked as a whole figure×1
Clone Trooper, 212th Attack Battalion, Orange MarkingsMinifigure, checked as a whole figure×3
Clone Trooper, 212th Clone GunnerMinifigure, checked as a whole figure×1
Dwarf Spider Droid, Dark Bluish Gray Dome, Fixed Black CannonMinifigure, checked as a whole figure×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.