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.
694 pieces in 208 part and color combinations, plus 7 minifigures.
LEGO counts 725 pieces. This inventory comes from a separate parts catalog and lists 726, including the 32 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.
Brick and Axle Separator v2.0Dark TurquoisePart 96874Element 6254100×1
Trans-Orange
1 piece
Tile Round 1 x 1Trans-OrangePart 98138Element 6514197 or 62747471 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 71739-1[No Color/Any Color]Part 78580Element 6345900×1
Minifigures
7 figures
Kai with Shoulder Cover (Legacy)Minifigure, checked as a whole figure×1
Jay with Pearl Gold Shoulder Cover (Legacy)Minifigure, checked as a whole figure×1
Cole with Shoulder Cover (Legacy)Minifigure, checked as a whole figure×1
Zane with Shoulder Cover and Silver Head (Legacy)Minifigure, checked as a whole figure×1
Serpentine Rattla - Sand BlueMinifigure, checked as a whole figure×1
Zane / Gold (Legacy) - Forbidden Spinjitzu WrapsMinifigure, checked as a whole figure×1
Mezmo, LegacyMinifigure, 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.