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.
608 pieces in 208 part and color combinations, plus 2 minifigures.
The official piece count includes the 7 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.
Tile Special 1 x 2 Grille with Bottom GrooveLight Bluish Gray ×2Flat Silver ×2Light Bluish Gray is lighter than Flat Silver.
Plate 2 x 3Black ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Black ×4Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm HolesBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Animal, Rabbit / Bunny, Baby Sitting with Black Eyes, Nose, and Mouth, White Face PrintDark TurquoisePart 18852pr0012Element 6443197×1
Orange
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Trans-Black
1 piece
Windscreen 6 x 6 x 3 Dome with Dual 2 FingersTrans-BlackPart 52979Element 6514328 or 6449991×1
Trans-Dark Blue
1 piece
Rock 1 x 1 Jewel / Gem 24 FacetTrans-Dark BluePart 30153Element 6513973 or 6247793×1
Minifigures
2 figures
Sonic the Hedgehog, Light Nougat Face, Green EyesMinifigure, checked as a whole figure×1
Dr. Ivo 'Eggman' RobotnikMinifigure, 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.