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.
LEGO counts 200 pieces. This inventory comes from a separate parts catalog and lists 199; 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.
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening]Light GrayPart 32269Element 4141455×1
Tubes and Hoses
6 pieces
Hose, Ribbed 7mm D. 11L / 8.8cmPearl Light GrayPart 78c11Element 4495208 or 4141672×2
Hose, Ribbed 7mm D. 16L / 12.8cmPearl Light GrayPart 78c16×2
Hose, Ribbed 7mm D. 9L / 7.2cmPearl Light GrayPart 78c09Element 4495206 or 4141671×2
String, Bands and Reels
1 piece
Rubber Belt Small [15mm ID] [Round Cross Section]WhitePart 85543Element 6699001 or 45806651 spare in the box×1
Technic Special
1 piece
Technic Ball JointBlackPart 32474Element 4290713 or 4143539×1
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.