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.
252 pieces in 99 part and color combinations, plus 2 minifigures.
LEGO counts 259 pieces. This inventory comes from a separate parts catalog and lists 260, including the 8 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.
Large Figure Limb Cover / Back Plate (Hydruka)Flat SilverPart 59577Element 4622777×2
Plate Special 1 x 4 with Angled TubesFlat SilverPart 61072Element 4632100×4
Trans-Clear
8 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-ClearPart 54200Element 6245250 or 42443621 spare in the box×4
Plate Round 1 x 1 with Solid StudTrans-ClearPart 6141Element 6514052 or 62400301 spare in the box×4
Tan
6 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×6
Dark Tan
4 pieces
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×4
Red
4 pieces
Equipment Dynamite SticksRedPart 64728Element 6270088 or 4538780×1
Food Hot Dog / SausageRedPart 33078Element 6144805 or 4520952×1
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]RedPart 32054Element 4140806 or 4125198×2
Yellow
4 pieces
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedYellowPart 32123bElement 6271167 or 32123241 spare in the box×4
Trans-Red
3 pieces
Rock 1 x 1 Crystal 5 PointTrans-RedPart 30385Element 6507863 or 6236961×1
Tile 1 x 2 with GrooveTrans-RedPart 3069bElement 6514220 or 6251290×2
Reddish Brown
2 pieces
Box / Crate with Handholds 3 x 4 x 1 2/3Reddish BrownPart 30150Element 4211185×2
Trans-Light Blue
2 pieces
Panel 4 x 4 x 6 Quarter CylinderTrans-Light BluePart 30562Element 6514097 or 6252048×2
Trans-Orange
2 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-OrangePart 54200Element 6245265 or 42443691 spare in the box×2
Trans-Brown
1 piece
Panel 1 x 2 x 1 [Square Corners]Trans-BrownPart 4865aElement 4200798×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 8190-1[No Color/Any Color]Part 89586Element 4578667×1
Minifigures
2 figures
Infernox, Trans-RedMinifigure, checked as a whole figure×1
Brains, Light Bluish Gray with 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.