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LEGO Missing Piece Checker

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.

International Space Station

Checking

21321 International Space Station

864 pieces in 186 part and color combinations.

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.

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Piece checklist

Plates 99 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×1
  • Plate 1 x 6 Black Part 3666 Element 366626 ×3
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 6 x 16 Black Part 3027 Element 302726 ×1
  • Plate 1 x 10 Dark Bluish Gray Part 4477 Element 4257526 or 4210816 ×4
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×8
  • Plate 2 x 4 Dark Tan Part 3020 Element 4497077 or 4267874 ×5
  • Plate 2 x 12 Light Bluish Gray Part 2445 Element 4211360 ×2
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×4
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×8
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×2
  • Plate 2 x 12 Orange Part 2445 Element 6313826 or 6056707 ×16
  • Plate 1 x 1 Pearl Gold Part 3024 Element 6069887 1 spare in the box ×16
  • Plate 2 x 2 Tan Part 3022 Element 4114084 or 302205 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×1
  • Plate 1 x 10 White Part 4477 Element 6552113 or 6550148 ×6
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×3
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×4
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×1
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×3

Plates Special 94 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×2
  • Plate Special 4 x 6, Studs on 3 Edges with ISS and 'International Space Station' Print Black Part 6180pr0005 Element 6309250 ×1
  • Bracket 1 x 1 - 1 x 1 Inverted Dark Bluish Gray Part 36840 Element 6225494 ×2
  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×8
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Dark Bluish Gray Part 88072 Element 6261355 or 4611703 ×1
  • Plate Special 2 x 2 with 2 Pins Dark Bluish Gray Part 15092 Element 6284702 or 6066952 ×1
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×10
  • Bracket 1 x 2 - 2 x 4 Light Bluish Gray Part 93274 Element 6118827 or 4613165 ×4
  • Bracket 2 x 2 - 2 x 2 Light Bluish Gray Part 3956 Element 6254807 or 6019212 ×1
  • Plate Special 1 x 1 Rounded with Handle Light Bluish Gray Part 26047 Element 6225246 ×3
  • Plate Special 1 x 2 Side Handle [Free Ends] Light Bluish Gray Part 2540 Element 4211632 ×7
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×1
  • Plate Special 1 x 2 with Clip Horizontal on Side Light Bluish Gray Part 11476 Element 6313114 or 6028812 ×2
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Light Bluish Gray Part 60470b Element 6337268 or 4556157 ×4
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Light Bluish Gray Part 3839b Element 4211464 ×2
  • Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 34103 Element 6211969 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Light Bluish Gray Part 10247 Element 6045988 ×2
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Light Bluish Gray Part 32828 Element 6227897 1 spare in the box ×4
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Light Bluish Gray Part 18674 Element 6183782 ×5
  • Technic Plate 2 x 4 [3 Holes] Light Bluish Gray Part 3709 Element 4211444 ×4
  • Bracket 1 x 2 - 1 x 2 White Part 99781 Element 6552141 or 6548275 ×2
  • Bracket 1 x 2 - 1 x 2 Inverted White Part 99780 Element 6548278 or 6070698 ×10
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] White Part 60897 Element 6330191 or 4613256 ×4
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) White Part 15573 Element 6550152 or 6051511 ×3
  • Plate Special 1 x 2, Top Clip [Split] White Part 92280 Element 4598527 ×3

Tiles 89 pieces

  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×3
  • Tile 1 x 4 with Solar Panels Print Dark Blue Part 2431pr0115 Element 6215341 ×64
  • Tile 2 x 4 with Groove Light Bluish Gray Part 87079 Element 4560183 ×4
  • Tile 2 x 2 with Groove Orange Part 3068b Element 4542142 or 4125268 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×6
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×2
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×8

Bricks Sloped 79 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×1
  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×2
  • Brick Sloped 33° 3 x 4 Black Part 3297 Element 6435854 or 329726 ×2
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Black Part 15672 Element 6069000 or 4653087 ×8
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×4
  • Brick Sloped Inverted 45° 4 x 1 Double with 1 x 2 Recessed Dark Bluish Gray Part 32802 Element 6185675 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Light Bluish Gray Part 54200 Element 4521921 or 4244372 1 spare in the box ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×16
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 1 spare in the box ×4
  • Brick Sloped 30° 1 x 2 x 2/3 White Part 85984 Element 6550189 or 4547489 ×14
  • Brick Sloped 33° 2 x 2 Double White Part 3300 Element 4578606 or 330001 ×12
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] White Part 15672 Element 6552150 or 6550153 ×12

Tiles Special 76 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×3
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×10
  • Tile Special 2 x 3 with 2 Clips with Solar Panel Print Dark Blue Part 65886pr0008 Element 6331694 ×46
  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×3
  • Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] Flat Silver Part 99563 Element 6208446 ×4
  • Tile Special 1 x 1 with Clip with Rounded Edges White Part 15712 Element 6348055 or 6054551 ×3
  • Tile Special Round 1 x 1 with Hollow Bar White Part 20482 Element 6186681 or 6178492 1 spare in the box ×3
  • Tile Special Round 2 x 2 with Hole White Part 15535 Element 6310185 ×4

Bars, Ladders and Fences 69 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Light Bluish Gray Part 48729b Element 6278156 or 4542590 1 spare in the box ×8
  • Bar 3L Light Bluish Gray Part 87994 Element 6093527 or 6064033 1 spare in the box ×37
  • Bar 5L with Handle (Friction Ram) Light Bluish Gray Part 87618 Element 4565433 ×2
  • Lever Small Base with Black Lever Light Bluish Gray Part 298c02 Element 4221775 1 spare in the box ×1
  • Bar 3L with Handle, Stop Ring and Side Stops (Minifig Ski Pole) Pearl Gold Part 90540 Element 6292254 or 6146340 1 spare in the box ×4
  • Bar 4L (Lightsaber Blade / Wand) Pearl Gold Part 30374 Element 6147169 or 4600267 ×5
  • Bar 4L (Lightsaber Blade / Wand) White Part 30374 Element 6116602 or 4129836 ×1
  • Bar Holder with Clip White Part 11090 Element 6341465 or 6136789 ×3
  • Bar Holder with Hole and Bar Handle White Part 23443 Element 6322489 or 6290268 ×4
  • Fence Lattice 1 x 4 x 1 White Part 3633 Element 4550171 or 363301 ×4

Plates Round Curved and Dishes 65 pieces

  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 Also in Dark Bluish Gray ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×7
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 Also in Black ×11
  • Plate Special 1 x 2 Rounded with 2 Open Studs Dark Bluish Gray Part 35480 Element 6221607 ×2
  • Plate Special 1 x 2 Rounded with 2 Open Studs Light Bluish Gray Part 35480 Element 6248890 ×23
  • Dish 2 x 2 Inverted [Radar] Metallic Silver Part 4740 Element 6528623 or 6277260 ×4
  • Plate Round 1 x 1 with Open Stud White Part 85861 Element 6168642 or 4547649 1 spare in the box ×9
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×3
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×1

Technic Bricks 41 pieces

  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×5
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×1
  • Technic Brick 1 x 1 with Pin Hole Dark Bluish Gray Part 6541 Element 4210639 ×16
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Light Bluish Gray Part 32064a Element 6206249 or 4233493 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] White Part 32000 Element 6564911 or 3200001 ×9
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin White Part 32064a Element 6548286 or 6178921 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×2

Technic Connectors 39 pieces

  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Black Part 15100 Element 6073231 ×4
  • Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar Holders Dark Bluish Gray Part 24122 Element 6310174 ×16
  • Technic Axle Connector Smooth [with x Hole + Orientation] Dark Bluish Gray Part 59443 Element 6084613 or 4516546 ×8
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Light Bluish Gray Part 42195 Element 6273212 ×8
  • Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar Holders White Part 24122 Element 6615541 or 6310183 ×2
  • Technic Pin Connector Round 1L [Beam] White Part 18654 Element 6550155 or 6177114 1 spare in the box ×1

Technic Pins 33 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×3
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×3
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×3
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×10
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×8

Bricks Round and Cones 30 pieces

  • Brick Round 2 x 2 Truncated Cone Black Part 98100 Element 4653822 ×1
  • Cone 1.17 x 1.17 x 2/3 (Fez) Black Part 85975 Element 6203937 or 4619597 ×5
  • Brick Round 1 x 1 Open Stud Light Bluish Gray Part 3062b Element 4211412 ×2
  • Brick Round 2 x 2 Truncated Cone with Black Squares Print Light Bluish Gray Part 98100pr0010 Element 6313734 ×1
  • Brick Round 2 x 2 with Axle Hole Light Bluish Gray Part 3941 Element 4211526 ×11
  • Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation Light Bluish Gray Part 30361c Element 6310181 ×2
  • Brick Round 2 x 2, Pin Holes Light Bluish Gray Part 17485 Element 6372076 or 6078985 ×2
  • Brick Round 2 x 2 Dome Bottom [Open Stud] White Part 15395 Element 6050914 ×1
  • Brick Round 2 x 2 Dome Top, Hollow Stud White Part 30367c Element 4216652 or 4124120 ×1
  • Brick Round 2 x 2 Truncated Cone White Part 98100 Element 6609536 or 4649167 ×1
  • Brick Round 2 x 2 [Grill] White Part 92947 Element 6615536 or 4650644 ×1
  • Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation White Part 30361c Element 4194010 or 4164092 ×1
  • Cone 1.17 x 1.17 x 2/3 (Fez) White Part 85975 Element 6173141 or 6028323 ×1

Bricks Curved 27 pieces

  • Brick Curved 6 x 2 Black Part 44126 Element 4180548 ×2
  • Brick Curved 2 x 2 x 2/3 Light Bluish Gray Part 15068 Element 6102357 ×2
  • Brick Curved Inverted 2 x 2 x 2/3 Light Bluish Gray Part 32803 Element 6185676 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×2
  • Brick Curved 2 x 2 x 2/3 White Part 15068 Element 6552147 or 6047220 ×7
  • Brick Curved 2 x 2, Two Top Studs White Part 30165 Element 6609535 or 4624989 ×2
  • Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes White Part 88930 Element 6552135 or 4583297 ×2
  • Brick Curved 4 x 1 Double, No Studs White Part 93273 Element 6552143 or 6023806 ×2
  • Brick Curved Inverted 2 x 1 White Part 24201 Element 6601928 or 6172927 ×4
  • Brick Curved Inverted 2 x 2 x 2/3 White Part 32803 Element 6210385 ×2

Technic Axles 27 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×8
  • Technic Axle 11 Light Bluish Gray Part 23948 Element 6178172 ×8
  • Technic Axle 12 Red Part 3708 Element 6147702 or 4125190 ×1
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×1
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×8
  • Technic Axle 9 Yellow Part 60485 Element 6130010 ×1

Bricks Special 19 pieces

  • Brick Special 1 x 2 with Grille Black Part 2877 Element 287726 ×4
  • Brick Special 1 x 2 with Pin Black Part 2458 Element 6116990 or 245826 ×8
  • Brick Special 1 x 2 x 2/3 with Studs on Sides Light Bluish Gray Part 4595 Element 6681658 or 4211502 ×1
  • Brick Special 1 x 2 with 2 Studs on 1 Side Tan Part 11211 Element 6024495 ×1
  • Brick Special 1 x 1 Studs on 4 Sides White Part 4733 Element 4111971 or 473301 ×5

Tiles Round and Curved 12 pieces

  • Tile Round 1 x 1 Dark Bluish Gray Part 98138 Element 6284596 or 6222416 1 spare in the box ×1
  • Tile Round 1 x 1 with Soda Can Tab, Ring Pull Print Flat Silver Part 98138pr0035 Element 6322904 or 6117400 1 spare in the box ×3
  • Tile Round 2 x 2 with Silver Lines, Bolts/Dots Print Light Bluish Gray Part 14769pr1112 Element 6237231 ×3
  • Tile Round 1 x 1 White Part 98138 Element 6564903 or 6284572 1 spare in the box ×5

Pneumatics 10 pieces

  • Pneumatic T-Piece (T Bar) [New Style] White Part 4697b Element 6615553 or 6289866 1 spare in the box ×10

Plates Wedged 9 pieces

  • Wedge Plate 3 x 2 Left Black Part 43723 Element 4180536 ×1
  • Wedge Plate 3 x 2 Right Black Part 43722 Element 4180508 ×1
  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×2
  • Wedge Plate 4 x 4 with 2 x 2 Cutout Black Part 43719 Element 6275401 or 4561035 ×1
  • Wedge Plate 3 x 3 Cut Corner White Part 2450 Element 6601842 or 4280148 ×2
  • Wedge Plate 4 x 4 with 2 x 2 Cutout White Part 43719 Element 6275403 or 4561038 ×2

Technic Special 9 pieces

  • Technic Ball Joint with Through Axle Hole Black Part 53585 Element 4286267 1 spare in the box ×4
  • Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Black Part 32124 Element 6280168 or 4114689 ×1
  • Technic Brick Special 2 x 2 with Ball and Axle Hole, with 6 Holes in Ball Dark Bluish Gray Part 57909b Element 4497253 ×2
  • Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole White Part 92013 Element 6021315 or 4619762 ×2

Flags, Banners and Signs 6 pieces

  • Flag 7 x 3 with Rod with Solar Panel Print Dark Blue Part 30292pr0005 Element 6338238 or 6314969 ×2
  • Flag 7 x 3 with Rod White Part 30292 Element 6339199 or 6284173 ×4

Minifig Accessories 6 pieces

  • Sports Roller Skate Black Part 11253 Element 6088585 or 6020265 1 spare in the box ×2
  • Sports Roller Skate Light Bluish Gray Part 11253 Element 6217791 1 spare in the box ×4

Technic Beams 6 pieces

  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×4
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×2

Bricks 4 pieces

  • Brick 1 x 3 Black Part 3622 Element 362226 ×1
  • Brick 1 x 8 Black Part 3008 Element 300826 ×1
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×2

Hinges, Arms and Turntables 4 pieces

  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×1
  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, without Groove Black Part 44567b Element 6266244 ×2
  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×1

Technic Bushes 3 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×3

Minifig Upper Body 2 pieces

  • Arm Skeleton Bent with Clips at 90° [Vertical Grip] White Part 93061 Element 6252200 or 6146060 ×2

Minifigs 2 pieces

  • Minifig Trophy Statuette, Astronaut Print White Part 90398pr0012 Element 6342715 or 6199668 1 spare in the box ×2

Panels 2 pieces

  • Panel 1 x 3 x 1 Dark Bluish Gray Part 23950 Element 6149768 ×2

Tools 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Transportation - Sea and Air 1 piece

  • Tail Shuttle - Small White Part 44661 Element 6253365 or 4288960 ×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.

Request a replacement from LEGO

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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.

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