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.
1,711 pieces in 466 part and color combinations, plus 6 minifigures.
LEGO counts 1,739 pieces. This inventory comes from a separate parts catalog and lists 1,741, including the 30 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.
Tile Special 1 x 2 Grille with Bottom GrooveLight Bluish Gray ×2Flat Silver ×2Light Bluish Gray is lighter than Flat Silver.
Plate 1 x 6Tan ×2Dark Tan ×13Tan is lighter than Dark Tan.
Plate 2 x 4Tan ×2Dark Tan ×6Tan is lighter than Dark Tan.
Brick Curved 2 x 2 x 2/3Black ×19Dark Bluish Gray ×13Black is darker than Dark Bluish Gray.
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateBlack ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Brick Sloped Inverted 75° 2 x 1 x 3Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
9 more look-alike pairs
Brick Special 1 x 1 with Stud on 1 SideBlack ×4Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Plate 1 x 3Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 6Black ×8Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 1 x 8Black ×6Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 2 x 4Black ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate 2 x 6Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate Special 1 x 4 with 2 Studs with Groove [New Underside]Black ×7Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Tile Special 1 x 1 with Clip with Rounded EdgesBlack ×10Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]BlackPart 18575Element 6346535 or 6093977×1
Technic Special
2 pieces
Technic Ball JointDark TurquoisePart 32474Element 6295155 or 6231378×1
Technic Brick 1 x 2 with Hole and Dual Beam ExtensionsRedPart 85943Element 6371957 or 6271079×1
Transportation - Land
2 pieces
Mudguard 2 x 4 with 2 x 2 Studs and Flared WingsRedPart 41854Element 6109466 or 4163394×2
Tubes and Hoses
2 pieces
Hose Rigid 3mm D. 12L / 9.6cmPearl GoldPart 75c12Element 6267914×2
Animals / Creatures
1 piece
Creature, Dragon, Baby, Dark Blue Markings, Lime Eyes PrintSand BluePart 3215pr0001Element 6546658 or 6434535×1
Panels
1 piece
Panel 1 x 2 x 1 with Rounded Corners and Central DividerTanPart 93095Element 6670646 or 6153157×1
Stickers
1 piece
Sticker Sheet for Set 71797-1[No Color/Any Color]Part 10103444Element 6435260×1
String, Bands and Reels
1 piece
Chain 6L [5 Links]Dark Bluish GrayPart 92338Element 6311445 or 4600437×1
Technic Bushes
1 piece
Technic BushBlackPart 3713Element 6332148 or 62105061 spare in the box×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
6 figures
SoraMinifigure, checked as a whole figure×1
Master Wu - EVOMinifigure, checked as a whole figure×1
Kai - Dragons RisingMinifigure, checked as a whole figure×1
Lloyd - Dragons Rising RobesMinifigure, checked as a whole figure×1
ArinMinifigure, checked as a whole figure×1
Rapton, Shoulder ArmorMinifigure, 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.