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.
Belville Figure Fixed Elbows, Male, Light Yellow Hair, Black Pants, White Shirt, Dark Purple Waistcoat with Gold Trim, Black Shoes (King)Dark PurplePart belfig0002c01pr0001Element 4499730×1
Plate Special 1 x 2 with 1 Stud without Groove (Jumper)WhitePart 3794a×3
Windows and Doors
3 pieces
Door 1 x 4 x 11 1/3 Arched TopGlitter Trans-Dark PinkPart 33216Element 4288062 or 4125553×2
Door Frame Arched 1 x 8 x 12MagentaPart 33227Element 4243933×1
Bricks Special
2 pieces
Brick Special 1 x 1 with HandleWhitePart 2921Element 6615537 or 6170567×2
Panels
2 pieces
Belville Wall 6 x 8 x 12 - Tower with WindowBright PinkPart 33213Element 4499712×2
Animal / Creature Body Parts
1 piece
Animal Body Part / Plant, Tail / Trunk / Tentacle / Tongue / Vine / Tree Branch (Short Tip)TanPart 43892Element 6170872 or 4183248×1
Baseplates
1 piece
Baseplate Raised 32 x 48 x 6 with Front and Back Steps and Green Garden PrintLight LimePart 44510pr0004Element 4499706×1
Minifig Shields, Weapons, & Tools
1 piece
Weapon Sword / Greatsword RoundChrome SilverPart 59Element 4649842 or 71014×1
Stickers
1 piece
Sticker Sheet for Set 7582-1[No Color/Any Color]Part 58576Element 4500618×1
Supports, Girders and Cranes
1 piece
Support 2 x 2 x 11 Solid PillarWhitePart 75347Element 4100331×1
Transportation - Sea and Air
1 piece
Boat / Rowing Boat 18 x 8 x 2 1/3 with OarlocksBright PinkPart 33129Element 4499705×1
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.