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.
450 pieces in 192 part and color combinations, plus 3 minifigures.
The official piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. 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.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Plate Special 1 x 4 with 2 Studs with Groove [New Underside]Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Brick 1 x 4 [3 Pin Holes]Dark Bluish GrayPart 3701Element 4213607 or 370127×3
Tiles Round and Curved
3 pieces
Tile Round 2 x 4Dark OrangePart 66857Element 6359041×1
Tile Round 2 x 2 with Bottom Stud HolderTanPart 14769Element 6066344×1
Tile Round 1 x 1Trans-Light BluePart 98138Element 6514192 or 62747391 spare in the box×1
Windscreens and Fuselage
3 pieces
Windscreen 3 x 4 x 1 1/3 Large Glass SurfaceTrans-BrownPart 57783Element 6507931 or 6247359×1
Windscreen 3 x 4 x 1 1/3 with 2 Studs on TopTrans-BrownPart 2437Element 6507913 or 6253360×1
Windscreen 2 x 6 x 2 Train without GlassWhitePart 13760Element 6566726 or 6187085×1
Technic Special
2 pieces
Technic Ball JointRedPart 32474Element 4290714 or 4178640×2
Animals / Creatures
1 piece
Animal, Dog, Small (Puppy), Alsatian / German Shepherd (Police Dog) with Black Eyes and Dark Brown Muzzle PrintMedium NougatPart 2889pr0001Element 6419079×1
Bars, Ladders and Fences
1 piece
Bar, Angled with 1 x 1 Round Plate / Stud on EndLight Bluish GrayPart 65578Element 6510189 or 63267481 spare in the box×1
Stickers
1 piece
Sticker Sheet for Set 60398-1[No Color/Any Color]Part 10103039Element 6434391×1
String, Bands and Reels
1 piece
String with End Studs 11L OverallBlackPart 14226c11Element 6096955 or 60375581 spare in the box×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
3 figures
Woman, Bright Light Blue Cardigan, Dark Red LegsMinifigure, checked as a whole figure×1
Boy, Dinosaur Shirt, Short Blue Legs, Blue CapMinifigure, checked as a whole figure×1
Man, Dark Blue Sweater, Sand Green Legs, Beard and GlassesMinifigure, checked as a whole figure×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.