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.
580 pieces in 226 part and color combinations, plus 3 minifigures.
The official piece count includes the 10 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 2 x 2 with Groove and Center Stud (Jumper)Black ×3Dark Blue ×7Black is yellower and darker than Dark Blue.
Bracket 1 x 2 - 1 x 2Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Brick 2 x 2Black ×3Dark Bluish Gray ×12Black is darker than Dark Bluish Gray.
Brick 2 x 4Black ×4Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate 1 x 6Black ×5Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate Round 1 x 1 with Solid StudBlack ×5Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
1 more look-alike pair
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Black ×3Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin HoleWhitePart 32184Element 6276981 or 6114940×2
Technic Beam 1 x 9 ThickWhitePart 40490Element 6001831 or 4156341×2
Tile Special Round 1 x 1 with Hollow BarWhitePart 20482Element 6186681 or 6178492×4
Blue
10 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×10
Medium Azure
9 pieces
Brick 2 x 4Medium AzurePart 3001Element 6603313 or 4625629×1
Plate 1 x 2Medium AzurePart 3023Element 6603337 or 6097419×5
Plate 2 x 8Medium AzurePart 3034Element 6603343 or 6253666×2
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)Medium AzurePart 18674Element 6136419×1
Tan
9 pieces
Brick Special 1 x 4 with 4 Studs on One SideTanPart 30414Element 4201062 or 4177990×2
Plate 1 x 3TanPart 3623Element 4121921 or 362305×2
Plate 6 x 8TanPart 3036Element 6070501 or 4114056×1
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)TanPart 15573Element 6092587×2
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]TanPart 18575Element 6346517 or 6084724×2
Reddish Brown
8 pieces
Plate Special 2 x 2 with Only 2 studsReddish BrownPart 33909Element 6196221×2
Technic Axle 3 with StopReddish BrownPart 24316Element 6135494×2
Technic Pin Connector 3L with 2 Pins and Center Hole [Pin Ridges Across Part]Reddish BrownPart 46189Element 6323704×4
Dark Blue
7 pieces
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Dark BluePart 87580Element 6389696 or 4565320Also in Black×7
Trans-Yellow
5 pieces
Dome Hemisphere 7 x 7 with 2 Pin Holes [Plain]Trans-YellowPart 1974Element 6501531×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-YellowPart 2654Element 6581773 or 6171728×3
Lime
3 pieces
Plate 2 x 4LimePart 3020Element 4537936 or 4534667×1
Technic Beam 1 x 5 ThickLimePart 32316Element 4661486 or 4571220×1
Tile Special 1 x 2 Grille with Bottom GrooveLimePart 2412bElement 6263442 or 4537921×1
Trans-Bright Green
3 pieces
Cone 1 x 1 [Top Groove]Trans-Bright GreenPart 59900Element 6514024 or 6337628×3
Trans-Clear
3 pieces
Antenna 1 x 4 with Flat TopTrans-ClearPart 3957bElement 6514014 or 6166111×1
Dish 3 x 3 Inverted [Radar]Trans-ClearPart 43898Element 6507917 or 6244730×1
Windscreen 2 x 4 Half DomeTrans-ClearPart 81911Element 6514460 or 6369941×1
Bright Light Orange
2 pieces
Tile Round 1 x 1Bright Light OrangePart 98138Element 6322822×2
Dark Purple
2 pieces
Brick 2 x 2Dark PurplePart 3003Element 4653960 or 4589613×1
Plate Special 3 x 2 with Rounded End, HoleDark PurplePart 3176Element 6174596×1
Orange
2 pieces
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Plate 2 x 2OrangePart 3022Element 4613982 or 4159007×1
Pearl Titanium
2 pieces
Engine Smooth Large [2 x 2 Thin Top Plate]Pearl TitaniumPart 4868bElement 6492232×1
Wheel Hard Plastic with Small Cleats and FlangesPearl TitaniumPart 64712Element 6347742 or 6208834×1
Trans-Orange
2 pieces
Dish 2 x 2 Inverted [Radar]Trans-OrangePart 4740Element 6580380 or 6245310×2
Dark Turquoise
1 piece
Animal, Rabbit / Bunny, Baby Sitting with Black Eyes, Nose, and Mouth, White Face PrintDark TurquoisePart 18852pr0012Element 6443197×1
Flat Silver
1 piece
Plate Special 1 x 4 with Angled TubesFlat SilverPart 61072Element 4632100×1
Medium Lavender
1 piece
Plate Special 2 x 2 with Groove and Center Stud (Jumper)Medium LavenderPart 87580Element 6177195×1
Trans-Red
1 piece
Rock 1 x 1 Jewel / Gem 24 FacetTrans-RedPart 30153Element 6513969 or 6247785×1
Minifigures
3 figures
Dr. Ivo 'Eggman' RobotnikMinifigure, checked as a whole figure×1
Super Sonic / Sonic the HedgehogMinifigure, checked as a whole figure×1
Shadow the Hedgehog, ScowlMinifigure, 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.