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.
856 pieces in 263 part and color combinations, plus 5 minifigures.
The official piece count includes the 23 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 1 x 1 with GrooveRed ×2Trans-Red ×2Trans-Red is see-through: hold the piece up to a light.
Tile 1 x 1 with GrooveRedPart 3070bElement 3070211 spare in the boxAlso in Trans-Red×2
Tile Round 2 x 2 with Bottom CrossRedPart 4150Element 415071 or 415021×2
Trans-Neon Orange
20 pieces
Antenna 8H WhipTrans-Neon OrangePart 2569Element 6164384 or 61248611 spare in the box×2
Cone 1 x 1 [Top Groove]Trans-Neon OrangePart 59900Element 6301326 or 6172239×18
Trans-Red
17 pieces
Cone 1 x 1 [Top Groove]Trans-RedPart 59900Element 6514021 or 6337596×2
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-RedPart 58176Element 6507867 or 6171762×1
Plate 1 x 1Trans-RedPart 3024Element 6513963 or 6252042×2
Plate 1 x 2Trans-RedPart 3023Element 6514003 or 6240212×8
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×2
Tile 1 x 1 with GrooveTrans-RedPart 3070bElement 6581817 or 62542482 spares in the boxAlso in Red×2
Trans-Neon Green
15 pieces
Brick Round 1 x 1 Open StudTrans-Neon GreenPart 3062bElement 6514237 or 6238675×2
Brick Round 2 x 2 with Axle HoleTrans-Neon GreenPart 3941Element 6273157 or 611649×1
Cone 1 x 1 [Top Groove]Trans-Neon GreenPart 59900Element 6301321 or 6172230×4
Plate Round 1 x 1 with Solid StudTrans-Neon GreenPart 6141Element 6240223 or 30057491 spare in the box×8
Trans-Green
14 pieces
Plate 1 x 1Trans-GreenPart 3024Element 6513967 or 6252046×12
Tile 1 x 1 with GrooveTrans-GreenPart 3070bElement 6581818 or 62542492 spares in the box×2
Trans-Clear
13 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-ClearPart 54200Element 6245250 or 42443621 spare in the box×2
Panel 1 x 4 x 3 [Side Supports / Hollow Studs]Trans-ClearPart 60581Element 6514156 or 6344088×4
Plate Round 1 x 1 with Solid StudTrans-ClearPart 6141Element 6514052 or 62400301 spare in the box×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-ClearPart 2654Element 6581772 or 6163901×4
Windscreen 6 x 6 x 3 Canopy Half Sphere with Dual 2 FingersTrans-ClearPart 50747Element 4624369 or 4530764×1
Trans-Brown
12 pieces
Glass for Window 1 x 2 x 2 FlatTrans-BrownPart 60601Element 6514138 or 6254564×10
Windscreen 5 x 8 x 2Trans-BrownPart 62576Element 4530473×1
Windscreen 8 x 4 x 2 with 4 Studs and HandleTrans-BrownPart 92579Element 6507964 or 6254293×1
Tan
10 pieces
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×10
Trans-Dark Blue
8 pieces
Cone 1 x 1 [Top Groove]Trans-Dark BluePart 59900Element 6514018 or 6301313×2
Dish 2 x 2 Inverted [Radar]Trans-Dark BluePart 4740Element 6580383 or 6398233×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-Dark BluePart 2654Element 6581774 or 6171732×4
Trans-Light Blue
7 pieces
Cupboard 2 x 3 x 2 DoorTrans-Light BluePart 4533Element 6514073 or 6253216×1
Plate Round 1 x 1 with Solid StudTrans-Light BluePart 6141Element 6514058 or 62402251 spare in the box×4
Tile Special 2 x 3 with 2 Clips [Thick U Clips]Trans-Light BluePart 30350c×1
Windscreen 6 x 4 x 2 1/3 Bubble Canopy with HandleTrans-Light BluePart 87752Element 6507953 or 6254264×1
Dark Purple
6 pieces
Brick Sloped 30° 1 x 2 x 2/3Dark PurplePart 85984Element 4566607×4
Plate Round 1 x 1 with Solid StudDark PurplePart 6141Element 45665221 spare in the box×2
Lime
3 pieces
Headwear, Clinger (Alien Invader)LimePart 95204pr0001Element 6021092 or 4646511×1
Hinge Tile 1 x 4 Locking Dual 1 Fingers on Top [8 Locking Ridges]LimePart 95120Element 4622571×1
Tile 1 x 2 with GrooveLimePart 3069bElement 4500125 or 4164025×1
Dark Tan
2 pieces
Technic Axle 3 with StudDark TanPart 6587Element 6031821 or 6013821×2
Flat Silver
2 pieces
Weapon Gun Ray / Sci FiFlat SilverPart 87993Element 4625812×2
[No Color/Any Color]
2 pieces
Sticker Sheet 1 for Set 7066-1[No Color/Any Color]Part 97956Element 4639581×1
Sticker Sheet 2 for Set 7066-1[No Color/Any Color]Part 96458Element 4626005×1
Minifigures
5 figures
Alien TrooperMinifigure, checked as a whole figure×1
Alien AndroidMinifigure, checked as a whole figure×1
Scientist in Hazmat Suit with HairMinifigure, checked as a whole figure×1
ADU Soldier, Gray MoustacheMinifigure, checked as a whole figure×1
ADU Soldier, FemaleMinifigure, 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.