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.
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×1
Technic Special
2 pieces
Technic Ball Joint with Through Axle HoleTanPart 53585Element 6559236×1
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm HolesWhitePart 67696Element 6360826×1
Animals / Creatures
1 piece
Animal, Fish [Hollow Stud Mouth]OrangePart 64648Element 4623481×1
Minifig Accessories
1 piece
Bow TieDark PinkPart 116106Element 6590283×1
Rock
1 piece
Rock 1 x 1 Crystal 5 PointWhitePart 30385Element 6591340×1
Technic Pins
1 piece
Technic Pin with Friction Ridges Lengthwise with No Center SlotsBlackPart 61332Element 62798751 spare in the box×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.