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.
Brick 1 x 2 without Bottom TubeTrans-Dark BluePart 3065Element 6514264 or 6244906×6
Brick Sloped 45° 2 x 2Trans-Dark BluePart 3039Element 6514101 or 6244887×8
Dark Bluish Gray
11 pieces
Brick Special 1 x 2 with PinDark Bluish GrayPart 2458Element 4211087×1
Brick Special 2 x 2 with 2 Pins and Axle HoleDark Bluish GrayPart 30000Element 6405646 or 4211024×2
Brick Special 2 x 4 with PinsDark Bluish GrayPart 6249Element 6321740 or 6249199×4
Chain 17L [21 Links]Dark Bluish GrayPart 30104Element 4516717 or 4211035×1
Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders]Dark Bluish GrayPart 3475bElement 4211084×2
Hips and Dark Bluish Gray LegsDark Bluish GrayPart 970c12Element 6168713 or 4570433×1
Trans-Light Blue
4 pieces
Windscreen 2 x 4 x 2Trans-Light BluePart 3823Element 6581802 or 6253682×4
Trans-Neon Green
4 pieces
Antenna 8H WhipTrans-Neon GreenPart 2569Element 6265159 or 6164380×2
Brick Round 2 x 2 with Axle HoleTrans-Neon GreenPart 3941Element 6273157 or 611649×2
Metallic Silver
2 pieces
Antenna 1 x 4 with Rounded TopMetallic SilverPart 3957aElement 4579837×2
Trans-Neon Orange
2 pieces
Dish 2 x 2 Inverted [Radar]Trans-Neon OrangePart 4740Element 6245295 or 3006347×2
Trans-Yellow
2 pieces
Brick Round 1 x 1 Open StudTrans-YellowPart 3062bElement 6514236 or 6238674×2
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.