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.
1,417 pieces in 272 part and color combinations, plus 8 minifigures.
LEGO counts 1,448 pieces. This inventory comes from a separate parts catalog and lists 1,458, including the 41 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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.
Cone 1 x 1 [No Top Groove]Yellow ×8Trans-Yellow ×1Trans-Yellow is see-through: hold the piece up to a light.
Brick Round 2 x 2 with Axle HoleBlack ×2Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Brick Sloped 33° 3 x 2Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 2 x 6Black ×2Dark Bluish Gray ×9Black is darker than Dark Bluish Gray.
Plate 2 x 8Black ×10Dark Bluish Gray ×8Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThickBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
1 more look-alike pair
Wedge Plate 3 x 6 Cut CornersBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Knob WheelYellowPart 32072Element 6284189 or 4203493×1
Transportation - Sea and Air
3 pieces
Engine, Very Large Turbine, with Pearl Light Gray Marbled PatternBlackPart 53983pat0001Element 4289157 or 4283929×1
Engine Smooth Large [2 x 2 Thin Top Plate]Light Bluish GrayPart 4868bElement 4263610×2
Windscreens and Fuselage
3 pieces
Windscreen 10 x 6 x 2 CurvedTrans-BrownPart 45705Element 6507923 or 6262645×2
Windscreen 6 x 4 x 2 Wedge CurvedTrans-BrownPart 41883Element 4286384 or 4163015×1
Containers
2 pieces
Box / Crate with Handholds 3 x 4 x 1 2/3Reddish BrownPart 30150Element 4211185×2
Large Buildable Figures
2 pieces
Large Figure Weapon Sword, Santis (Series 1)BluePart 47462Element 4297365×2
Rock
2 pieces
Rock Panel 2 x 4 x 6Reddish BrownPart 47847Element 6470002 or 4285708×2
Minifigs
1 piece
Torso/Head Mechanical [Exo-Force Robot]Pearl Light GrayPart 53988Element 4494597 or 4283927×1
Stickers
1 piece
Sticker Sheet for Set 7709-1[No Color/Any Color]Part 56746Element 4297316×1
Tubes and Hoses
1 piece
Hose, Ribbed 7mm D. 24L / 19.2cmPearl Light GrayPart 78c24Element 4495197 or 4275390×1
Wheels and Tyres
1 piece
Wheel 11 x 8 with Center GrooveLight Bluish GrayPart 42610Element 4211758×1
Minifigures
8 figures
Meca OneMinifigure, checked as a whole figure×1
KeikenMinifigure, checked as a whole figure×1
Ha-Ya-ToMinifigure, checked as a whole figure×1
HikaruMinifigure, checked as a whole figure×1
RyoMinifigure, checked as a whole figure×1
TakeshiMinifigure, checked as a whole figure×1
Iron Drone / DevastatorMinifigure, checked as a whole figure×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.