BlockTalk Find Your Set

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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.

Space Exploration Telescope

Checking

31378 Space Exploration Telescope

278 pieces in 102 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.

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Piece checklist

Black 134 pieces

  • Arm Skeleton [Bent / 2 Clips] Black Part 93609 Element 6326681 or 6146095 ×1
  • Bar 1L with Clip [Cut Edges and One Side Hole] [Full Clip] Black Part 3484 Element 6439039 ×2
  • Bar 3L Black Part 87994 Element 6185316 or 6093525 1 spare in the box ×3
  • Bar 5L with Handle (Friction Ram) Black Part 87618 Element 4623113 ×5
  • Bar Holder with Clip Black Part 11090 Element 6315887 or 6015891 ×10
  • Bracket 1 x 1 - 1 x 2 Inverted Black Part 73825 Element 6335317 ×2
  • Brick Curved 2 x 2 x 2/3 Black Part 15068 Element 6053077 ×6
  • Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 ×1
  • Brick Round 2 x 2 [Grill] Black Part 92947 Element 6024730 ×4
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Black Part 85080 Element 6078253 or 4567436 ×4
  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Black Part 48092 Element 6252902 or 6173190 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×5
  • Brick Special 1 x 1 with Studs on 2 Adjacent Sides Black Part 26604 Element 6187572 ×5
  • Brick Special 1 x 2 with 2 Studs on 1 Side Black Part 11211 Element 6138173 ×2
  • Plate 1 x 1 x 2/3 with Open Stud Black Part 86996 Element 6388352 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×6
  • Plate 1 x 8 Black Part 3460 Element 346026 ×6
  • Plate 2 x 2 Black Part 3022 Element 302226 ×3
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×2
  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×9
  • Plate Round 4 x 4 with 2 x 2 Round Opening Black Part 11833 Element 6167800 or 6045912 ×2
  • Plate Round Half 4 x 8 Black Part 22888 Element 6133200 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Black Part 60897 Element 6330189 or 4617547 ×6
  • Plate Special 2 x 2 Splat Gear, 6 Teeth Black Part 35442 Element 6306064 ×2
  • Plate Special 4 x 4 with 2 x 2 Opening Black Part 64799 Element 6058118 ×1
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Black Part 32828 Element 6196548 1 spare in the box ×3
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Black Part 18674 Element 6195325 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×3
  • Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Black Part 14720 Element 6390379 ×2
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear Rack 1/4 Circle 6 x 6, 15 Teeth Black Part 78442 Element 6451564 ×2
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×12
  • Tile 2 x 3 Black Part 26603 Element 6162892 ×1
  • Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×2
  • Weapon Chakram / Hoop Blade / Ring Black Part 35485 Element 6391688 ×1
  • Weapon Hilt Symmetric Black Part 66909 Element 6331084 ×3
  • Window 1 x 2 x 2 Flat Front Black Part 60592 Element 6382697 or 4521439 ×3

White 58 pieces

  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×2
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×1
  • Brick Round 2 x 2 Truncated Cone White Part 98100 Element 6609536 or 4649167 ×1
  • Brick Round 2 x 2 x 2 Robot Body, Axle Holder '+' Orientation White Part 30361c Element 4194010 or 4164092 ×1
  • Brick Round 2 x 2, Pin Holes White Part 17485 Element 6218899 ×1
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] White Part 85080 Element 6619303 or 6078115 ×28
  • Brick Sloped 30° 1 x 2 x 2/3 White Part 85984 Element 6550189 or 4547489 ×2
  • Brick Special 1 x 1 with Studs on 2 Sides White Part 47905 Element 6548273 or 4626882 ×1
  • Brick Special 1 x 2 x 1 2/3 with 8 Studs on 3 Sides White Part 67329 Element 6552182 or 6312480 ×1
  • Cylinder Half 2 x 4 x 2 with 1 x 2 Cutout White Part 24593 Element 6615543 or 6249552 ×5
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×4
  • Plate Round 4 x 4 with 2 x 2 Round Opening White Part 11833 Element 6615544 or 6392162 ×2
  • Plate Round 4 x 4 with Pin Hole White Part 60474 Element 6564904 or 4515347 ×1
  • Plate Round Corner 2 x 2 with 1 x 1 Cutout White Part 79491 Element 6564910 or 6499714 ×2
  • Plate Special 1 x 2 Rounded with 2 Open Studs White Part 35480 Element 6552167 or 6550175 ×1
  • Tile Round 1 x 1 White Part 98138 Element 6564903 or 6284572 1 spare in the box ×1
  • Tile, Star with Stud Holder, Pin Hole White Part 11609 Element 6469041 1 spare in the box ×2
  • Turntable 2 x 2 Female White Part 27448 Element 6536567 or 6238334 ×2

Blue 18 pieces

  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Blue Part 48092 Element 6469255 or 4215467 ×4
  • Minifig Head, Globe, Bright Green Land Print Blue Part 28621pr0005 Element 6589143 ×1
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Blue Part 32123b Element 6536559 1 spare in the box ×8
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×2
  • Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×1

Dark Azure 15 pieces

  • Brick Special 1 x 2 with 2 Studs on 1 Side Dark Azure Part 11211 Element 6523387 ×1
  • Plate 1 x 4 Dark Azure Part 3710 Element 6133728 or 6089781 ×3
  • Plate 1 x 8 Dark Azure Part 3460 Element 6210227 ×3
  • Technic Ball Joint Dark Azure Part 32474 Element 6412745 ×1
  • Technic Brick 1 x 1 with Axle Hole Dark Azure Part 73230 Element 6446031 ×5
  • Technic Gear 20 Tooth with Axle Hole [+ Opening] Dark Azure Part 69779 Element 6396480 ×1
  • Tile 1 x 2 with Groove Dark Azure Part 3069b Element 6151659 ×1

Light Bluish Gray 14 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Light Bluish Gray Part 11477 Element 6028813 ×3
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Light Bluish Gray Part 60478 Element 4515369 ×6
  • Technic Pin Connector Hub Perpendicular 3L with 2 Pins Light Bluish Gray Part 2393 Element 6408168 ×2
  • Technic Plate Rotor 3 Blade with Smooth Ends, 6 Studs, 1 Bottom Ridge (Propeller) Light Bluish Gray Part 51138 Element 6307999 ×3

Dark Bluish Gray 8 pieces

  • Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×3
  • Bar 6L with Stop Ring Dark Bluish Gray Part 63965 Element 6170420 or 6081987 ×1
  • Technic Beam 2 x 3 Thick [90° Offset Centre Beam Hole] Dark Bluish Gray Part 3167 Element 6475314 ×1
  • Technic Pin Connector Hub with 2 Perpendicular Axles Dark Bluish Gray Part 10197 Element 6005331 ×3

Trans-Clear 7 pieces

  • Dome Hemisphere 4 x 4 Trans-Clear Part 86500 Element 6551130 or 6530722 ×1
  • Glass for Window 1 x 2 x 2 Flat with Crescent Moon on Black Background Print Trans-Clear Part 60601pr0019 Element 6589146 ×1
  • Glass for Window 1 x 2 x 2 Flat with Planet, Stars on Black Background Print Trans-Clear Part 60601pr0018 Element 6589144 ×1
  • Glass for Window 1 x 2 x 2 Flat with Stars on Black Background Print Trans-Clear Part 60601pr0020 Element 6589145 ×1
  • Light Brick 2 x 3 x 1 1/3 with Dark Bluish Gray Base [Yellow LED] Trans-Clear Part 62930 Element 6555880 or 6429472 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Trans-Clear Part 61252 Element 6429708 ×2

Dark Blue 4 pieces

  • Plate Round Corner 4 x 4 Dark Blue Part 30565 Element 6023154 or 4506996 ×4

Red 4 pieces

  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1
  • Technic Ball Joint Red Part 32474 Element 4290714 or 4178640 ×1
  • Tile Special 1 x 2 with Handle Red Part 2432 Element 243221 ×1

Pearl Gold 3 pieces

  • Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] Pearl Gold Part 99563 Element 6207933 or 4651407 ×2
  • Weapon Chakram / Hoop Blade / Ring Pearl Gold Part 35485 Element 6286094 ×1

Tan 3 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2
  • Technic Ball Joint Tan Part 32474 Element 6488494 or 6097508 ×1

Yellow 3 pieces

  • Technic Panel Dome 5 x 5 with Axle Holes Yellow Part 7343 Element 6595303 or 6549301 ×1
  • Technic Panel Dome 5 x 5 with Pin Holes Yellow Part 4412 Element 6592650 ×1
  • Tile Special 1 x 2 with Handle Yellow Part 2432 Element 243224 ×1

Dark Turquoise 2 pieces

  • Cone 1 x 1 [Top Groove] Dark Turquoise Part 59900 Element 6482735 ×1
  • Technic Ball Joint Dark Turquoise Part 32474 Element 6295155 or 6231378 ×1

Medium Azure 2 pieces

  • Plate Round Half 4 x 8 Medium Azure Part 22888 Element 6138571 ×2

Light Nougat 1 piece

  • Dome 1 x 1 x 2/3 Light Nougat Part 6908 Element 6573537 1 spare in the box ×1

Nougat 1 piece

  • Brick Round 2 x 2 Sphere with Stud [Plain] Nougat Part 20953 Element 6592648 ×1

Reddish Brown 1 piece

  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×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

Buy the piece

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.

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