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.
820 pieces in 182 part and color combinations, plus 4 minifigures.
The official piece count includes the 20 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.
Technic Pin Connector Round [Slotted]Pearl TitaniumPart 62462Element 6245501 or 6167943×4
Tan
8 pieces
Brick Special 1 x 4 with 4 Studs on One SideTanPart 30414Element 4201062 or 4177990×1
Plate 1 x 4TanPart 3710Element 4113233 or 371005×3
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom PinTanPart 32064aElement 6219794 or 4233494×2
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]TanPart 99563Element 6271228×2
Trans-Light Blue
5 pieces
Minifig Head [Plain] [Vented Stud - 2 Holes]Trans-Light BluePart 28621Element 6513993 or 6168667×4
Plate 1 x 2Trans-Light BluePart 3023Element 6514007 or 6240222×1
Blue
4 pieces
Plate Round 1 x 1 with Solid StudBluePart 6141Element 6141231 spare in the box×2
Technic Pin 1/2 without Friction RidgesBluePart 4274Element 41430051 spare in the box×2
Yellowish Green
4 pieces
Plate Round 1 x 1 with Solid StudYellowish GreenPart 6141Element 60578981 spare in the box×4
Flat Silver
3 pieces
Hair Flat Top, Short with Straight Even Side SectionsFlat SilverPart 25379Element 6320779×1
Large Figure Weapon 6 Blade Ninja Star / ShurikenFlat SilverPart 41125Element 6327940×1
Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard]Flat SilverPart 21459Element 61165931 spare in the box×1
Trans-Dark Blue
3 pieces
Projectile, Spring Shooter Ammunition 8L BarTrans-Dark BluePart 15303Element 6296379 or 6065898×3
Reddish Brown
2 pieces
Technic Axle 3 with StopReddish BrownPart 24316Element 6135494×2
Trans-Neon Green
2 pieces
Weapon Sword Serrated with Marbled Dark Purple PatternTrans-Neon GreenPart 19858pat0001Element 6331006×2
Yellow
2 pieces
Technic Brick 1 x 1 with Pin HoleYellowPart 6541Element 654124×2
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 71738-1[No Color/Any Color]Part 71548Element 6321424×1
Minifigures
4 figures
Ghost, Soul Archer (Legacy)Minifigure, checked as a whole figure×1
Ghost, Ghoultar (Legacy)Minifigure, checked as a whole figure×1
Zane - Legacy, Black Torso, Black Legs, White Wraps, Katana HolderMinifigure, checked as a whole figure×1
Jay - GoldMinifigure, 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.