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 149 pieces. This inventory comes from a separate parts catalog and lists 157; 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.
Fabuland Figure Barty Bulldog with Brown Head, Red Torso with Gold Buttons, Red Arms and Hands, Black Legs and Red Fireman HelmetRedPart fabfig0002c06pr0001×1
Fabuland Figure Barty Bulldog with White Head, Red Torso with Black Buttons, Red Arms and Hands, Black Legs and Red Fireman HelmetRedPart fabfig0002c07pr0002×2
Containers
2 pieces
Box 4 x 4 x 2 Bottom with Semicircle Cut-out EndsRedPart 4461Element 4141347×2
Tile 2 x 2 with Fabuland Mail Envelope, Airplane and '3' Stamp PrintWhitePart 3068bpr9938×1
Tile 2 x 2 with Fabuland Mail Envelope, Text and '1' Stamp PrintWhitePart 3068bpr9939×1
Windscreens and Fuselage
2 pieces
Windowscreen 1 x 4 x 5 Curved TopRedPart 4463Element 4141378×2
Baseplates
1 piece
Baseplate 32 x 32GreenPart 3811Element 4219692 or 381128×1
Hinges, Arms and Turntables
1 piece
Turntable 4 x 4 Square Base with Top, Complete AssemblyRedPart 3403c01Element 4221665 or 4143678×1
Stickers
1 piece
Sticker Sheet for Set 3682-1[No Color/Any Color]Part 192855×1
Windows and Doors
1 piece
Door Frame 2 x 6 x 7RedPart 4071Element 4141386 or 407121×1
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.