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.
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.
Bracket 1 x 2 - 2 x 2Black ×8Dark Blue ×2Black is yellower and darker than Dark Blue.
Brick Special 1 x 1 with Stud on 1 SideBlack ×4Dark Blue ×2Black is yellower and darker than Dark Blue.
Brick Special 1 x 2 with 2 Studs on 1 SideBlack ×12Dark Blue ×2Black is yellower and darker than Dark Blue.
Plate 2 x 4Black ×1Dark Blue ×1Black is yellower and darker than Dark Blue.
Technic Brick Special 1 x 2 with Pin Hole and 1 x 2 PlateRedPart 73109Element 6385920×1
Technic Beams Special
4 pieces
Technic Pin Connector Double with Bar [2 Holes]BlackPart 85940Element 6173124 or 4562148×4
Large Buildable Figures
2 pieces
Large Figure Armor Plate, SmallDark BluePart 28220Element 6470086×2
Minifig Accessories
2 pieces
Musical Instrument Microphone [Plain]BlackPart 90370Element 60885501 spare in the box×2
Pneumatics
2 pieces
Pneumatic T-Piece (T Bar) [New Style]TanPart 4697bElement 64700761 spare in the box×2
Technic Bushes
1 piece
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedLight Bluish GrayPart 32123bElement 6271165 or 42115731 spare in the box×1
Technic Special
1 piece
Technic Brick 1 x 2 with Hole and Dual Beam ExtensionsRedPart 85943Element 6371957 or 6271079×1
Tiles Special
1 piece
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]Bright Light OrangePart 99563Element 6236454×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Windscreens and Fuselage
1 piece
Windscreen 10 x 6 x 2 CurvedDark AzurePart 45705Element 6507929 or 6470071×1
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.