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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.

Air Race Jet

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42066 Air Race Jet

1,151 pieces in 145 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

Technic Pins 460 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 4 spares in the box ×214
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×14
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×37
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×8
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×106
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Dark Bluish Gray Part 11214 Element 6015356 ×17
  • Technic Pin 1/2 with 2L Bar Extension Light Bluish Gray Part 61184 Element 6347715 or 4520320 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×24
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×11
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×15
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 2 spares in the box ×3
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×7

Technic Beams 251 pieces

  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×9
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×11
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×6
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×31
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×4
  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×3
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×22
  • Technic Beam 1 x 7 Thick Dark Bluish Gray Part 32524 Element 4495931 or 4210752 ×15
  • Technic Beam 3 x 3 T-Shape Thick Dark Bluish Gray Part 60484 Element 4552349 or 4535773 ×16
  • Technic Beam 3 x 5 L-Shape Thick Dark Bluish Gray Part 32526 Element 4210753 ×12
  • Technic Beam 1 x 13 Thick Light Bluish Gray Part 41239 Element 4522934 or 4156299 ×7
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×18
  • Technic Beam 1 x 5 Thick Light Bluish Gray Part 32316 Element 4211651 ×13
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Light Bluish Gray Part 11478 Element 6328063 or 6029206 ×4
  • Technic Beam 3 x 3 L-Shape Thin Light Bluish Gray Part 32056 Element 6271815 or 4211574 ×4
  • Technic Beam Triangle Thin [Type II] Light Bluish Gray Part 99773 Element 6331428 or 6009019 ×8
  • Technic Beam 1 x 11 Thick Medium Blue Part 32525 Element 6372249 or 6167321 ×4
  • Technic Beam 1 x 13 Thick Medium Blue Part 41239 Element 6171916 ×4
  • Technic Beam 1 x 5 Thick Medium Blue Part 32316 Element 6176425 ×6
  • Technic Beam 1 x 7 Thick Medium Blue Part 32524 Element 6164394 ×11
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Medium Blue Part 32271 Element 6097561 or 6057450 ×2
  • Technic Beam 3 x 5 L-Shape Thick Medium Blue Part 32526 Element 6164392 ×4
  • Technic Beam 1 x 13 Thick Red Part 41239 Element 4522938 or 4262082 ×1
  • Technic Beam 1 x 2 Thick Red Part 43857 Element 4185664 ×1
  • Technic Beam 1 x 3 Thick Red Part 32523 Element 4153718 ×4
  • Technic Beam 1 x 7 Thick Red Part 32524 Element 4495933 or 4162098 ×1
  • Technic Beam 1 x 9 Thick Red Part 40490 Element 4645733 or 4192225 ×4
  • Technic Beam 1 x 3 Thick with Black '40 1977 - 2017' and 24 Tooth Gear Print White Part 32523pr0001 Element 6170737 ×1
  • Technic Beam 1 x 4 Thin White Part 32449 Element 6360072 or 4144138 ×10
  • Technic Beam 1 x 7 Thin White Part 32065 Element 6271584 or 6176554 ×3
  • Technic Beam 1 x 9 Thick White Part 40490 Element 6001831 or 4156341 ×4
  • Technic Beam 1 x 5 Thin Yellow Part 32017 Element 4503425 or 4199343 ×4

Technic Connectors 187 pieces

  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×26
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×8
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×4
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×4
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×8
  • Technic Axle and Pin Connector Perpendicular Split Black Part 92907 Element 6279021 or 4610371 ×4
  • Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Black Part 87408 Element 6278412 or 4558692 ×1
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Dark Bluish Gray Part 6553 Element 4210665 ×1
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×26
  • Technic Axle and Pin Connector Perpendicular Double Dark Bluish Gray Part 32291 Element 6280395 or 4210655 ×5
  • Technic Pin Connector Hub with 2 Axles Dark Bluish Gray Part 27940 Element 6167281 ×3
  • Technic Pin Connector Hub with 2 Perpendicular Axles Dark Bluish Gray Part 10197 Element 6005331 ×2
  • Technic Pin Connector Round 1L [Beam] Dark Bluish Gray Part 18654 Element 6100030 1 spare in the box ×9
  • Technic Pin Connector Hub with 1 Axle Dark Brown Part 22961 Element 6134197 ×8
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×9
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×5
  • Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Across Part) Light Bluish Gray Part 55615 Element 4296059 ×2
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×6
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Light Bluish Gray Part 15100 Element 6172538 ×25
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Light Bluish Gray Part 87082 Element 4560175 ×12
  • Technic Pin Connector Perpendicular 2 x 2 Bent Light Bluish Gray Part 44809 Element 4211880 ×1
  • Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×6
  • Technic Axle and Pin Connector Angled #4 - 135° Medium Blue Part 32192 Element 6100751 ×1
  • Technic Axle and Pin Connector Perpendicular Red Part 6536 Element 6261373 or 4188298 ×3
  • Technic Axle and Pin Connector Perpendicular Double Split Red Part 41678 Element 4173975 ×2
  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×1
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×3

Technic Axles 113 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×9
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×6
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×3
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×14
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×11
  • Technic Axle 10 Red Part 3737 Element 6130005 or 4267858 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 1 spare in the box ×36
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×5
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×6
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×4
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×4
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×7
  • Technic Axle 9 Yellow Part 60485 Element 6130010 ×1

Technic Panels 48 pieces

  • Technic Panel 3 x 11 x 1 Black Part 15458 Element 6080356 ×4
  • Technic Panel 5 x 11 x 1 Black Part 64782 Element 4566243 ×5
  • Technic Panel 5 x 11 x 1 Tapered Black Part 18945 Element 6164383 ×10
  • Technic Panel Curved and Bent 6 x 3 Black Part 24116 Element 6268012 or 6133246 ×1
  • Technic Panel Fairing # 3 Small Smooth Long, Side A Black Part 64683 Element 4541924 ×1
  • Technic Panel Fairing # 4 Small Smooth Long, Side B Black Part 64391 Element 4541325 ×1
  • Technic Panel Fairing #1 Small Smooth Short, Side A Black Part 87080 Element 4566251 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B Black Part 87086 Element 4566249 ×1
  • Technic Panel Fairing #5 Long Smooth, Side A Black Part 64681 Element 4558774 ×1
  • Technic Panel Fairing #6 Long Smooth, Side B Black Part 64393 Element 4558731 ×1
  • Technic Panel 5 x 11 x 1 Medium Blue Part 64782 Element 6164385 ×4
  • Technic Panel 5 x 11 x 1 Tapered Medium Blue Part 18945 Element 6171961 ×4
  • Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface Medium Blue Part 11954 Element 6164386 ×6
  • Technic Panel Fairing #13 Large Short Smooth, Side A Medium Blue Part 64394 Element 6173160 ×1
  • Technic Panel Fairing #14 Large Short Smooth, Side B Medium Blue Part 64680 Element 6173158 ×1
  • Technic Panel Fairing #5 Long Smooth, Side A Medium Blue Part 64681 Element 6097571 ×3
  • Technic Panel Fairing #6 Long Smooth, Side B Medium Blue Part 64393 Element 6097570 ×3

Technic Bushes 26 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 ×6
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 2 spares in the box ×20

Technic Gears 25 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 ×2
  • Technic Driving Ring 3L Dark Bluish Gray Part 18947 Element 6100931 ×2
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×2
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×3
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×1
  • Technic Worm Gear Light Bluish Gray Part 4716 Element 4211510 ×2
  • Technic Gear 16 Tooth with Clutch on Both Sides Red Part 18946 Element 6100930 ×4
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×3
  • Technic Gear 24 Tooth Clutch with Dark Bluish Gray Center White Part 76244 Element 6198486 or 6036892 ×1

Wheels and Tyres 9 pieces

  • Tyre 24 x 12 Low Profile Black Part 18977 Element 6102596 ×2
  • Tyre 30.4 x 14 VR Solid Black Part 58090 Element 6601610 or 4550937 ×2
  • Wheel 43.2 x 26 Technic Racing Small with 6 Pinholes Light Bluish Gray Part 56908 Element 6276854 or 4634091 ×1
  • Wheel 18 x 12 with Axle Hole and Stud White Part 18976 Element 6132265 ×2
  • Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes White Part 55982 Element 6092256 or 4490128 ×2

Technic Steering, Suspension and Engine 8 pieces

  • Technic Link 1 x 6 without Stoppers Black Part 32005a Element 4629921 or 4530733 ×4
  • Technic Steering / CV Joint Axle Dark Bluish Gray Part 92906 Element 4610374 ×1
  • Technic Steering / CV Joint Light Bluish Gray Part 32494 Element 6265690 or 6122217 ×1
  • Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×2

Technic Beams Special 4 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Light Bluish Gray Part 33299b Element 4563045 ×1
  • Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×3

Tiles 4 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 2 x 4 with Groove Black Part 87079 Element 4560182 ×2

Plates Special 3 pieces

  • Bracket 1 x 2 - 2 x 2 Inverted Black Part 99207 Element 6000650 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Light Bluish Gray Part 10247 Element 6045988 ×1

Electronics 2 pieces

  • Battery Box, Power Functions 4 x 11 x 7 with Orange Switch and Dark Bluish Gray Covers [Complete Assembly] [New Version] Light Bluish Gray Part 16511 Element 6368436 or 6257768 ×1
  • Motor, Medium, Power Functions, 3 x 6 x 3 with Dark Bluish Gray Bottom and 20cm Wire Light Bluish Gray Part 58120 Element 6209881 or 6151440 ×1

Plates 2 pieces

  • Plate 1 x 6 Black Part 3666 Element 366626 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1

Technic Special 2 pieces

  • Technic Changeover Catch - + opening Red Part 6641 Element 6099696 or 4270473 ×2

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 Trans-Green Part 98138 Element 6514194 or 6274742 1 spare in the box ×1
  • Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×1

Transportation - Sea and Air 2 pieces

  • Propeller 7 Blade 6 Diameter Flat Silver Part 87751 Element 6493590 or 6176468 ×2

Large Buildable Figures 1 piece

  • Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes Light Bluish Gray Part 98585 Element 6186129 or 6039505 ×1

Stickers 1 piece

  • Sticker Sheet for Set 42066-1 [No Color/Any Color] Part 31836 Element 6179494 ×1

Tubes and Hoses 1 piece

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×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.

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