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.
3,139 pieces in 599 part and color combinations, plus 7 minifigures.
The official piece count includes the 32 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.
Tile Round 1 x 1Red ×2Trans-Red ×12Trans-Red is see-through: hold the piece up to a light.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)White ×1Trans-Clear ×1Trans-Clear is see-through: hold the piece up to a light.
Plate 1 x 1White ×1Trans-Clear ×1Trans-Clear is see-through: hold the piece up to a light.
Tile 1 x 2 with GrooveMedium Azure ×7Opal Trans-Light Blue ×3Opal Trans-Light Blue is see-through: hold the piece up to a light.
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Dark Turquoise ×4Medium Azure ×5Dark Turquoise is darker than Medium Azure.
Tile 1 x 2 with GrooveDark Turquoise ×2Medium Azure ×7Dark Turquoise is darker than Medium Azure.
9 more look-alike pairs
Tile 45° Cut 2 x 2 (Triangle)Dark Turquoise ×4Medium Azure ×2Dark Turquoise is darker than Medium Azure.
Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style]Tan ×1Dark Tan ×4Tan is lighter than Dark Tan.
Bracket 1 x 2 - 1 x 2 InvertedBlack ×2Dark Bluish Gray ×10Black is darker than Dark Bluish Gray.
Plate 1 x 2Black ×7Dark Bluish Gray ×14Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudBlack ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Pin Connector Hub with 2 Perpendicular AxlesBlack ×12Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Technic Plate 2 x 4 [3 Holes]Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Tile 1 x 2 with GrooveBlack ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Tile Special Round 1 x 1 with Hollow BarBlack ×1Dark Bluish Gray ×3Black is darker than Dark Bluish Gray.
Plant, Flower, Peony Rose with 2 LayersDark PinkPart 5904Element 6550578 or 6513737×1
Technic Bush 1/2 Smooth with Axle Hole Semi-ReducedDark PinkPart 32123bElement 64438521 spare in the box×3
Sand Blue
4 pieces
Brick 1 x 1Sand BluePart 3005Element 4620077 or 4169428×2
Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]Sand BluePart 99563Element 6372479×2
Dark Purple
3 pieces
Plate 1 x 2Dark PurplePart 3023Element 4655695 or 4589622×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)Dark PurplePart 15573Element 6092604×1
Opal Trans-Light Blue
3 pieces
Tile 1 x 2 with GrooveOpal Trans-Light BluePart 3069bElement 6514227 or 6316987Also in Medium Azure×3
Dark Azure
2 pieces
Equipment Camera Handheld with Central ViewfinderDark AzurePart 30089bElement 6476484 or 6425512×1
Tile Special Round 1 x 1 with Hollow BarDark AzurePart 20482Element 62237331 spare in the box×1
Flat Silver
2 pieces
Weapon Harpoon [Smooth Shaft]Flat SilverPart 18041Element 6162578 or 60784711 spare in the box×1
Weapon Sword / Shortsword Elaborate HiltFlat SilverPart 76764Element 60201901 spare in the box×1
Bright Light Blue
1 piece
Plate Round 4 x 6Bright Light BluePart 3766Element 6522316×1
Dark Blue
1 piece
Plant, Flower, Plate Round 1 x 1 with 5 PetalsDark BluePart 24866Element 64951671 spare in the box×1
Medium Lavender
1 piece
Plant, Flower, Plate Round 1 x 1 with 5 PetalsMedium LavenderPart 24866Element 62096841 spare in the box×1
Trans-Light Blue
1 piece
Panel 1 x 6 x 5 with Green/Yellow Tracking Monitor, Presents, Santa PrintTrans-Light BluePart 59349pr0039Element 6542150×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 41843-1[No Color/Any Color]Part 10112961Element 6542154×1
Minifigures
7 figures
Elf - Green Torso, Red Legs, Knight HelmetMinifigure, checked as a whole figure×1
Santa, 973c22h27pr0002 TorsoMinifigure, checked as a whole figure×1
Elf - Bright Green Torso, Red Legs, Aviator CapMinifigure, checked as a whole figure×1
Elf - Red Torso, Green Legs, Space HelmetMinifigure, checked as a whole figure×1
Mrs. Claus, Red DressMinifigure, checked as a whole figure×1
Elf - Bright Green Torso, Red Legs, Bright Green Hat, BackpackMinifigure, checked as a whole figure×1
Elf - Red, Green Legs, Bright Green Hat, Hearts for EyesMinifigure, 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.