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.
442 pieces in 154 part and color combinations, plus 3 minifigures.
The official piece count includes the 14 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.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Red ×2Trans-Red ×4Trans-Red is see-through: hold the piece up to a light.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)White ×4Trans-Clear ×4Trans-Clear is see-through: hold the piece up to a light.
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateBlack ×2Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Flag 2 x 2 Trapezoid with Flat Area between ClipsBlack ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Hinge Brick 1 x 2 BaseBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
1 more look-alike pair
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Black ×6Dark Bluish Gray ×7Black is darker than Dark Bluish Gray.
Technic Pin 1/2 without Friction RidgesLight Bluish GrayPart 4274Element 4274194 or 42114832 spares in the box×12
Trans-Red
13 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-RedPart 54200Element 6245252 or 42443631 spare in the boxAlso in Red×4
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 Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×2
Tile 1 x 2 with GrooveTrans-RedPart 3069bElement 6514220 or 6251290×2
Wave / Flame Rounded Large with Marbled Trans-Orange PatternTrans-RedPart 85959pat0001Element 4548009×2
Trans-Dark Blue
8 pieces
Cylinder Half 2 x 4 x 5 with 1 x 2 cutoutTrans-Dark BluePart 85941Element 6246873 or 4547850×2
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-Dark BluePart 58176Element 6328198 or 6171763×1
Plate 1 x 1Trans-Dark BluePart 3024Element 6513965 or 6252044×2
Tile 1 x 2 with GrooveTrans-Dark BluePart 3069bElement 6514219 or 6251289×2
Windscreen 10 x 6 x 2 CurvedTrans-Dark BluePart 45705Element 6507927 or 6455051×1
Trans-Green
8 pieces
Cone 1 x 1 [No Top Groove]Trans-GreenPart 4589Element 4108129 or 618848×6
Tile 1 x 1 with GrooveTrans-GreenPart 3070bElement 6581818 or 62542491 spare in the box×2
Yellow
8 pieces
Brick Special 1 x 2 with GrilleYellowPart 2877Element 287724×1
Door 1 x 3 x 1 LeftYellowPart 3822Element 6587460 or 4190511×1
Door 1 x 3 x 1 RightYellowPart 3821Element 6587459 or 4537985×1
Plate 2 x 4YellowPart 3020Element 302024×2
Tile 1 x 2 with GrooveYellowPart 3069bElement 306924×1
Tile Round 2 x 2 with Bottom CrossYellowPart 4150Element 415074 or 415024×2
Blue
6 pieces
Brick 2 x 4BluePart 3001Element 300173 or 300123×1
Plate 1 x 3BluePart 3623Element 362323×2
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]BluePart 32064b×2
Technic Pin Long with Friction Ridges Lengthwise, 2 Center SlotsBluePart 6558Element 4514553×1
Trans-Clear
5 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-ClearPart 54200Element 6245250 or 42443621 spare in the boxAlso in White×4
Brick Sloped 33° 3 x 6 No Inner WallsTrans-ClearPart 58181Element 6514103 or 6396803×1
Trans-Neon Green
4 pieces
Cone 1 x 1 [No Top Groove]Trans-Neon GreenPart 4589Element 618849 or 458949×4
Metallic Gold
3 pieces
Tile 1 x 2 with GrooveMetallic GoldPart 3069bElement 6546117 or 6265247×3
[No Color/Any Color]
1 piece
Sticker Sheet for Set 5973-1[No Color/Any Color]Part 86906Element 4552418×1
Minifigures
3 figures
Space Police III - Skull TwinMinifigure, checked as a whole figure×2
Space Police III - OfficerMinifigure, 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.