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.
585 pieces in 185 part and color combinations, plus 15 minifigures.
LEGO counts 643 pieces. This inventory comes from a separate parts catalog and lists 645, including the 60 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.
Mudguard 2 x 4 with Molded HeadlightsDark GreenPart 44674Element 6610800 or 6258726×1
Vehicle Body, Wheel Arch / Mudguard 3 x 4 x 1 2/3 Curved Fenders [Plain]GreenPart 18051Element 6258724×1
Mudguard 2 x 4 with Molded HeadlightsRedPart 44674Element 4653024 or 4500123×2
Supports, Girders and Cranes
3 pieces
Support Round 2 x 2 x 2 Stand with Reinforced UndersideDark Bluish GrayPart 19798Element 6106283×1
Support 1 x 6 x 5 Girder RectangularReddish BrownPart 64448Element 6470025 or 6002837×2
Tiles Round and Curved
2 pieces
Tile Round 2 x 2 with Bottom Stud HolderTanPart 14769Element 6066344×1
Tile Round 2 x 2 with Bottom Stud HolderWhitePart 14769Element 6601846 or 6044691×1
Animals / Creatures
1 piece
Animal, FrogGreenPart 33320Element 6171101 or 4157270×1
Containers
1 piece
Bucket 1 x 1 x 1Light Bluish GrayPart 95343Element 6057487×1
Minifig Upper Body
1 piece
Arm Mechanical Straight (Droid) [2 Clips at 90°]BlackPart 59230Element 45057571 spare in the box×1
Stickers
1 piece
Sticker Sheet for Set 80103-1[No Color/Any Color]Part 51280Element 6258911×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
15 figures
Boy, White and Blue Hoodie, Short Medium Blue Legs, Black HairMinifigure, checked as a whole figure×1
Racer, White and Red Robe with Ties and Sash Belt, Black Hair, Sweat DropsMinifigure, checked as a whole figure×1
Racer, White and Red Robe with Ties and Sash Belt, Black Hair, Big SmileMinifigure, checked as a whole figure×1
Racer, White and Red Robe with Ties and Sash Belt, Black Hair, Clenched Teeth SmileMinifigure, checked as a whole figure×1
Racer, White and Red Robe with Ties and Sash Belt, Black Hair, Raised EyebrowMinifigure, checked as a whole figure×1
Man, Sand Blue Robe, Tan Conical Hat, BeardMinifigure, checked as a whole figure×1
Man, Red Flannel Shirt, Blue Legs, Black Hair, Clenched Teeth SmileMinifigure, checked as a whole figure×1
Man, Black Suit and Tie, Light Bluish Gray Hair, Moustache and GlassesMinifigure, checked as a whole figure×1
Woman, Open Green Jacket with Necklace, Black HairMinifigure, checked as a whole figure×1
Racer, White and Orange Robe with Ties and Sash Belt, Black Hair, Raised EyebrowMinifigure, checked as a whole figure×1
Racer, White and Orange Robe with Ties and Sash Belt, Black Hair, Big SmileMinifigure, checked as a whole figure×1
Racer, White and Orange Robe with Ties and Sash Belt, Black Hair, Slight SmileMinifigure, checked as a whole figure×1
Racer, White and Orange Robe with Ties and Sash Belt, Black Hair, Clenched Teeth SmileMinifigure, checked as a whole figure×1
Racer, White and Orange Robe with Ties and Sash Belt, Black Hair, Scared / NeutralMinifigure, checked as a whole figure×1
Racer, White and Red Robe with Ties and Sash Belt, Black Hair, Scared / NeutralMinifigure, 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.