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.
1,818 pieces in 371 part and color combinations, plus 2 minifigures.
The official piece count includes the 8 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.
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.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Red ×1Trans-Red ×1Trans-Red is see-through: hold the piece up to a light.
Brick 1 x 4Black ×1Dark Blue ×17Black is yellower and darker than Dark Blue.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Black ×4Dark Blue ×31Black is yellower and darker than Dark Blue.
Plate 1 x 10Black ×2Dark Blue ×11Black is yellower and darker than Dark Blue.
Plate 1 x 4Black ×2Dark Blue ×26Black is yellower and darker than Dark Blue.
Plate 6 x 10Black ×3Dark Blue ×3Black is yellower and darker than Dark Blue.
11 more look-alike pairs
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)Black ×2Dark Blue ×4Black is yellower and darker than Dark Blue.
Tile 1 x 1 with GrooveBlack ×3Dark Blue ×15Black is yellower and darker than Dark Blue.
Tile 2 x 4 with GrooveBlack ×1Dark Blue ×7Black is yellower and darker than Dark Blue.
Bracket 1 x 1 - 1 x 1 InvertedBlack ×7Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Bracket 1 x 2 - 1 x 2 InvertedBlack ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Brick 1 x 4Black ×1Dark Bluish Gray ×5Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×2Dark Bluish Gray ×9Black is darker than Dark Bluish Gray.
Plate 4 x 12Black ×4Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Plate 4 x 8Black ×2Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Plate Round Half 3 x 6 with 1 x 2 CutoutBlack ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Pin Connector Round 1L [Beam]Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudPearl TitaniumPart 6141Element 60382011 spare in the box×17
Yellow
16 pieces
Bracket 1 x 2 - 1 x 2 InvertedYellowPart 99780Element 6057458×1
Brick Special 1 x 1 with HeadlightYellowPart 4070Element 407024×2
Plate 1 x 2YellowPart 3023Element 302324×3
Plate 2 x 4YellowPart 3020Element 302024×1
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)YellowPart 4032aElement 403224×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)YellowPart 15573Element 6092583×1
Technic Axle 5YellowPart 32073Element 6130008×6
Trans-Bright Green
12 pieces
Projectile, Spring Shooter Ammunition 8L BarTrans-Bright GreenPart 15303Element 6287551 or 6062599×12
Dark Brown
9 pieces
Brick 1 x 2Dark BrownPart 3004Element 6058257 or 4623774×1
Plate 1 x 1Dark BrownPart 3024Element 6194729 or 60138301 spare in the box×4
Plate 1 x 2Dark BrownPart 3023Element 6058221 or 6013831×2
Plate 1 x 8Dark BrownPart 3460Element 4519946×2
Tan
8 pieces
Technic Pin Long without Friction RidgesTanPart 32556×8
Trans-Clear
6 pieces
Brick 1 x 2 without Bottom TubeTrans-ClearPart 3065Element 6514262 or 6244904×2
Equipment Crystal Ball Globe 2 x 2 x 2Trans-ClearPart 30106Element 6507889 or 6274736×1
Tile 1 x 1 with GrooveTrans-ClearPart 3070bElement 6581822 or 62542541 spare in the box×1
Tile Special Round 1 x 1 with Hollow BarTrans-ClearPart 20482Element 6507895 or 61868671 spare in the box×2
Green
5 pieces
Brick 1 x 3GreenPart 3622Element 4109679 or 362228×5
Reddish Brown
4 pieces
Brick Special 1 x 1 with HeadlightReddish BrownPart 4070Element 4225469×4
Orange
2 pieces
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifig Trophy Statuette, Emmet in Orange Uniform/Vest, Brown Hair PrintOrangePart 90398pr0051Element 62704671 spare in the box×1
Bright Green
1 piece
Tile 1 x 2 with GrooveBright GreenPart 3069bElement 6195258 or 4195201×1
Trans-Green
1 piece
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-GreenPart 54200Element 6245270 or 42445731 spare in the box×1
Trans-Red
1 piece
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-RedPart 54200Element 6245252 or 42443631 spare in the boxAlso in Red×1
Trans-Yellow
1 piece
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-YellowPart 54200Element 6245272 or 42609421 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 70839-1[No Color/Any Color]Part 58396Element 6270356×1
Minifigures
2 figures
Rex DangervestMinifigure, checked as a whole figure×1
Emmet, Dark Blue Rex Dangervest Vest, Smudged StubbleMinifigure, 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.