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.
Duplo Figure with Fireman Helmet White, and Dark Brown Face and HandsBlackPart 47517c01pr0002Element 6273447 or 6203760×1
Duplo Figure with Fireman Helmet White, and Gray Mustache on Nougat Face and HandsBlackPart 47517c01pr0001Element 6034896 or 4595981×2
Duplo Figure with Cap Red, with Bright Green Long Sleeve Shirt with Light Orange Collar and Pocket Flaps - Nougat Face with Open Mouth Smile - Dark Bluish Gray LegsBright GreenPart 63710c02pr0002Element 4596031×1
Duplo Figure with Ponytail Reddish Brown, Zoo ShirtTanPart 75113c01pr0004Element 6108789 or 4667638×4
Technic Bricks
8 pieces
Technic Brick 1 x 16 [15 Pin Holes]RedPart 3703Element 370321×8
Technic Gears
8 pieces
Technic Gear 40 ToothLight Bluish GrayPart 3649Element 6195314 or 4285634×8
Vehicle Base, Brick Special 4 x 10 with 4 PinsRedPart 30076Element 4144354 or 4144351×3
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.