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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.

Planet Earth and Moon in Orbit

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42179 Planet Earth and Moon in Orbit

526 pieces in 117 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

Technic Pins 185 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×8
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 2 spares in the box ×62
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×10
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×48
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×4
  • Technic Pin Long 3l with Stop and Hole Light Bluish Gray Part 77765 Element 6338962 ×1
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Light Bluish Gray Part 65304 Element 6321747 ×26
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×2
  • Technic Pin 1/2 with Friction Red Part 89678 Element 6378120 1 spare in the box ×3
  • Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole Red Part 66906 Element 6360104 ×4
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×8
  • Technic Axle Pin 3L without Friction Ridges and 2L Axle White Part 65249 Element 6289797 ×5
  • Technic Pin without Friction Ridges Lengthwise Yellow Part 3673 Element 6331822 1 spare in the box ×4

Technic Beams 81 pieces

  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×6
  • Technic Beam 1 x 15 Thick with Alternating Holes Black Part 71710 Element 6321716 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 Also in Dark Bluish Gray ×4
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×4
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×2
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×2
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 Also in Dark Bluish Gray ×2
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 Also in Dark Bluish Gray ×4
  • Technic Beam 1 x 7 Thick with Alternating Holes Black Part 2391 Element 6435016 Also in Dark Bluish Gray ×1
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 Also in Dark Bluish Gray ×1
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×2
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×8
  • Technic Beam 3 x 5 L-Shape Thick with Alternating Holes Black Part 2477 Element 6408182 ×3
  • Technic Beam 1 x 3 Thick Blue Part 32523 Element 4509376 or 4144284 ×5
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Dark Bluish Gray Part 60483 Element 6265093 or 6006141 Also in Black ×1
  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 Also in Black ×4
  • Technic Beam 1 x 7 Thick Dark Bluish Gray Part 32524 Element 4495931 or 4210752 Also in Black ×2
  • Technic Beam 1 x 7 Thick with Alternating Holes Dark Bluish Gray Part 2391 Element 6432397 Also in Black ×4
  • Technic Beam 1 x 9 Thick Dark Bluish Gray Part 40490 Element 4645730 or 4210757 Also in Black ×1
  • Technic Beam 3 x 3 T-Shape Thick Dark Bluish Gray Part 60484 Element 4552349 or 4535773 ×2
  • Technic Beam Round 11 x 11 Dark Bluish Gray Part 77107 Element 6411632 ×2
  • Technic Beam 1 x 15 Thick Light Bluish Gray Part 32278 Element 4542577 or 4211770 ×2
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Light Bluish Gray Part 11478 Element 6328063 or 6029206 ×4
  • Technic Beam 1 x 3 Thin Red Part 6632 Element 6364451 or 4107824 ×2
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Red Part 11478 Element 6327047 or 6214344 ×4
  • Technic Beam 1 x 7 Thick Red Part 32524 Element 4495933 or 4162098 ×3
  • Technic Beam Round 15 x 15 Reddish Orange Part 3250 Element 6482822 ×2

Technic Connectors 78 pieces

  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×11
  • Technic Axle Connector with Axle Hole [Reinforced] Black Part 42135 Element 6331716 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 Also in Dark Bluish Gray ×2
  • Technic Pin Connector 3L with 2 Pins and Center Hole [Pin Ridges Across Part] Black Part 46189 Element 6325521 or 6267991 ×8
  • Technic Pin Connector Hub with 1 Axle Black Part 22961 Element 6253260 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×2
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×2
  • Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Black Part 87408 Element 6278412 or 4558692 ×1
  • Technic Axle and Pin Connector Perpendicular Blue Part 6536 Element 6261383 or 6178359 ×2
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Blue Part 65487 Element 6282145 ×1
  • Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×3
  • Technic Axle and Pin Connector Angled #2 - 180° Dark Bluish Gray Part 32034 Element 32034199 or 6271876 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Dark Bluish Gray Part 42003 Element 6273715 or 4210857 Also in Black ×6
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×3
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×1
  • Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Along Part) Light Bluish Gray Part 49130 Element 6313453 ×1
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) Light Bluish Gray Part 65489 Element 6282158 ×2
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] Light Bluish Gray Part 44874 Element 6321303 ×9
  • Technic Pin Connector Round [Slotted] Pearl Gold Part 62462 Element 6390147 or 6245500 ×6
  • Technic Axle and Pin Connector Angled #2 - 180° White Part 32034 Element 6271870 or 4125554 ×2
  • Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole White Part 32184 Element 6276981 or 6114940 ×5

Technic Axles 60 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×1
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×3
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×5
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×11
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×1
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×11
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×9
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×3
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×1
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×3
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×3
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×5
  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×1

Technic Gears 37 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×3
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×4
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×3
  • Technic Gear Rack 1/4 Circle 11 x 11, 35 Teeth Black Part 24121 Element 6322255 or 6224911 ×4
  • Technic Turntable Large Type 4 Top, 60 Tooth Black Part 88738 Element 6413529 ×2
  • Technic Turntable Small Base, 28 Tooth Black Part 99010 Element 6326620 or 4652236 ×2
  • Technic Gear 20 Tooth Double Bevel with Clutch on Both Sides Blue Part 35185 Element 6224999 ×1
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×4
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×4
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×2
  • Technic Turntable Large Type 3 Base Light Bluish Gray Part 18939 Element 6109285 ×2
  • Technic Turntable Small Top Light Bluish Gray Part 99009 Element 4652235 ×2
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×4

Bricks Curved 14 pieces

  • Brick Curved Inverted 2 x 2 x 2/3 Light Bluish Gray Part 32803 Element 6185676 ×4
  • Brick Curved 3 x 2 No Studs White Part 24309 Element 6552158 or 6132212 ×4
  • Brick Curved 4 x 2 No Studs White Part 93606 Element 6552144 or 6031947 ×6

Plates Special 14 pieces

  • Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×8
  • Plate Special 2 x 2 with 2 Pin Holes Light Bluish Gray Part 2817 Element 4211376 ×6

Technic Bushes 14 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 2 spares in the box ×11
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×3

Plates 10 pieces

  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×3

Technic Beams Special 9 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Black Part 61408 Element 6313520 ×2
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×6
  • Technic Beam Frame 7 x 11 Black Part 39794 Element 6265643 ×1

Wheels and Tyres 8 pieces

  • Train Wheel Small, hole notched for wheels holder pin Black Part 50254 Element 4295370 or 4227006 ×4
  • Wheel 57 x 14 with 4 Spokes with 2 Holes and Black Integral Tire Black Part 39367pat0002 Element 6460559 or 6287602 ×4

Bars, Ladders and Fences 5 pieces

  • Bar 6L with Stop Ring Black Part 63965 Element 6170421 or 6081988 1 spare in the box ×1
  • Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×4

Technic Panels 4 pieces

  • Technic Panel Dome 5 x 5 with Pin Holes with Earth, Northern Hemisphere Print Blue Part 4412pr0002 Element 6532261 or 6463208 ×1
  • Technic Panel Dome 5 x 5 with Pin Holes with Earth, Southern Hemisphere Print Blue Part 4412pr0001 Element 6532263 or 6463209 ×1
  • Technic Panel Dome 11 x 11 with Pin Holes Bright Light Orange Part 4413 Element 6510120 or 6452851 ×2

Technic Special 3 pieces

  • Technic Ball Joint Light Bluish Gray Part 32474 Element 6070731 or 4585707 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] Pearl Gold Part 48267 Element 6385549 ×2

Tiles 2 pieces

  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×2

Stickers 1 piece

  • Sticker Sheet for Set 42179-1 [No Color/Any Color] Part 10105335 Element 6462848 ×1

Technic Steering, Suspension and Engine 1 piece

  • Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×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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