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.
Hose, Ribbed 7mm D. 4L / 3.2cmPearl Light GrayPart 78c04Element 4495200 or 4275389×2
Hose, Ribbed 7mm D. 9L / 7.2cmPearl Light GrayPart 78c09Element 4495206 or 4141671×8
Dark Gray
8 pieces
Technic Pin 3/4Dark GrayPart 32002Element 41098542 spares in the box×8
White
5 pieces
Large Figure Head Connector Block 3 x 4 x 1 2/3WhitePart 32553Element 4144511×2
Large Figure Weapon, Claw Hook with AxleWhitePart 32551Element 4157102×2
Large Figure Weapon, Claw, Triple, with AxleWhitePart 32506Element 4508432 or 4158028×1
Yellow
4 pieces
Technic Engine CrankshaftYellowPart 2853Element 6640378 or 4119474×4
Orange
2 pieces
Plate Round 1 x 1 with Solid StudOrangePart 6141Element 41571031 spare in the box×2
Red
2 pieces
Plate Round 1 x 1 with Solid StudRedPart 6141Element 6141211 spare in the box×2
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.