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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.

Tracked Loader

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42094 Tracked Loader

827 pieces in 129 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 217 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×11
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×26
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×85
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×2
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×22
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×30
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×22
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×12
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×5

Technic Connectors 150 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×3
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×6
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×2
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×14
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×7
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×6
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Black Part 15100 Element 6073231 ×6
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Black Part 87082 Element 4560174 ×6
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×20
  • Technic Pin Connector Toggle Joint Smooth Double with 2 Pins Black Part 48496 Element 4849626 or 4238840 ×1
  • Technic Axle and Pin Connector Angled #2 - 180° Dark Bluish Gray Part 32034 Element 32034199 or 6271876 ×6
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Dark Bluish Gray Part 42003 Element 6273715 or 4210857 ×12
  • Technic Pin Connector Hub with 2 Axles Dark Bluish Gray Part 27940 Element 6167281 ×4
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Light Bluish Gray Part 32014 Element 6268924 or 4509886 ×1
  • Technic Axle and Pin Connector Perpendicular Double Split Light Bluish Gray Part 41678 Element 4211889 ×8
  • Technic Driving Ring Connector Smooth [4 rounded side walls] Light Bluish Gray Part 26287 Element 6196757 ×2
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×2
  • Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×10
  • Technic Pin Connector Round [Slotted] Red Part 62462 Element 6173126 or 4526984 ×3
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×19
  • Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×4
  • Technic Axle and Pin Connector Perpendicular Yellow Part 6536 Element 6261367 or 4173666 ×4
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Yellow Part 32184 Element 6276974 or 6037676 ×1

Technic Beams 104 pieces

  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×2
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×4
  • Technic Beam 1 x 2 Thick Black Part 43857 Element 4385726 or 4177444 ×4
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×2
  • Technic Beam 1 x 7 Thin Black Part 32065 Element 6271573 or 6253293 ×3
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Black Part 6629 Element 6279881 or 4119800 ×6
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×14
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×1
  • Technic Beam Triangle Thin [Type II] Black Part 99773 Element 6331437 or 6010864 ×4
  • Technic Beam 1 x 13 Thick Dark Bluish Gray Part 41239 Element 4522937 or 4261932 ×6
  • Technic Beam 1 x 2 Thin Dark Bluish Gray Part 41677 Element 6338422 or 4210980 ×4
  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 ×1
  • Technic Beam 2 x 4 L-Shape Thick Dark Bluish Gray Part 32140 Element 6271830 or 4210667 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×11
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Light Bluish Gray Part 11478 Element 6328063 or 6029206 ×8
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Light Bluish Gray Part 32348 Element 6278129 or 4211668 ×2
  • Technic Beam 1 x 13 Thick Yellow Part 41239 Element 4522935 or 4237328 ×1
  • Technic Beam 1 x 3 Thick Yellow Part 32523 Element 4153707 ×3
  • Technic Beam 1 x 4 Thin Yellow Part 32449 Element 6327559 or 4199345 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Yellow Part 32348 Element 6278131 or 4500485 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Yellow Part 32271 Element 6276838 or 4544005 ×8
  • Technic Beam 1 x 9 Thick Yellow Part 40490 Element 6115616 or 4187136 ×4
  • Technic Beam 2 x 4 L-Shape Thick Yellow Part 32140 Element 6271828 or 4141628 ×4
  • Technic Beam 3 x 3 T-Shape Thick Yellow Part 60484 Element 6072627 ×2
  • Technic Beam 3 x 5 L-Shape Thick Yellow Part 32526 Element 4144022 ×2

Technic Axles 94 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×3
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×1
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×3
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×23
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×16
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×4
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×20
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×4
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×1
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×4
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×9
  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×4

Technic Special 81 pieces

  • Technic Link Tread Wide with Two Pin Holes, Reinforced Black Part 88323 Element 6014648 ×70
  • Technic Linear Actuator Mini with Dark Bluish Gray Head and Orange Axle Light Bluish Gray Part 92693 Element 6221464 or 4612100 ×1
  • Technic Changeover Catch - + opening Red Part 6641 Element 6099696 or 4270473 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Red Part 41669 Element 4185661 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Yellow Part 41669 Element 6174481 or 4194642 ×8

Bricks Round and Cones 34 pieces

  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Black Part 25214 Element 6179182 ×8
  • Brick Round 2 x 2 with Axle Hole Reddish Brown Part 3941 Element 4211166 ×20
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Yellow Part 25214 Element 6253294 or 6173898 ×6

Technic Bushes 29 pieces

  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×18
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×11

Technic Gears 27 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×6
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×1
  • Technic Tread Sprocket Wheel Large 10 Tooth Black Part 57519 Element 6526471 or 4582792 ×4
  • Technic Tread Sprocket Wheel Small 6 Tooth Black Part 57520 Element 4662228 or 4544527 ×2
  • Technic Turntable Large Type 3 Top, 60 Tooth Black Part 18938 Element 6109283 ×1
  • Technic Gear 20 Tooth Double Bevel with Clutch on Both Sides Blue Part 35185 Element 6224999 ×1
  • Technic Driving Ring 3L Dark Bluish Gray Part 18947 Element 6100931 ×1
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×2
  • Technic Gear 20 Tooth Bevel with Pin Hole Light Bluish Gray Part 87407 Element 4558690 ×1
  • Technic Turntable Large Type 3 Base Light Bluish Gray Part 18939 Element 6109285 ×1
  • Technic Gear 16 Tooth with Clutch on Both Sides Red Part 18946 Element 6100930 ×1
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×5
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×1

Technic Beams Special 24 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Black Part 33299b Element 4563044 ×18
  • Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×2
  • Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick Light Bluish Gray Part 64178 Element 4540797 ×2
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×2

Wheels and Tyres 16 pieces

  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×16

Tiles Round and Curved 14 pieces

  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×8
  • 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-Orange Part 98138 Element 6514197 or 6274747 1 spare in the box ×2
  • Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×3

Technic Panels 12 pieces

  • 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 #21 5L Small Smooth, Side B Black Part 11946 Element 6316923 or 6023036 Also in Dark Bluish Gray ×1
  • Technic Panel Fairing #22 5L Small Smooth, Side A Black Part 11947 Element 6319983 or 6022761 Also in Dark Bluish Gray ×1
  • Technic Panel Fairing #5 Long Smooth, Side A Black Part 64681 Element 4558774 ×2
  • Technic Panel Fairing #6 Long Smooth, Side B Black Part 64393 Element 4558731 ×2
  • Technic Panel Fairing # 3 Small Smooth Long, Side A Dark Bluish Gray Part 64683 Element 6431193 or 6248903 ×1
  • Technic Panel Fairing # 4 Small Smooth Long, Side B Dark Bluish Gray Part 64391 Element 6431194 or 6248902 ×1
  • Technic Panel Fairing #21 5L Small Smooth, Side B Dark Bluish Gray Part 11946 Element 6330085 or 6197965 Also in Black ×1
  • Technic Panel Fairing #22 5L Small Smooth, Side A Dark Bluish Gray Part 11947 Element 6352665 or 6197945 Also in Black ×1

Technic Steering, Suspension and Engine 8 pieces

  • Technic Engine Crankshaft Light Bluish Gray Part 2853 Element 6640384 or 4211609 ×6
  • Technic Shock Absorber 6.5L with Soft Spring, Standard Coil [Complete Assembly] Light Bluish Gray Part 76138 Element 6027565 or 4265688 ×2

Bars, Ladders and Fences 5 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×1
  • Bar 3L Black Part 87994 Element 6185316 or 6093525 1 spare in the box ×1
  • Bar Holder with Clip Dark Bluish Gray Part 11090 Element 6336970 or 6015890 ×1
  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye Trans-Orange Part 58176 Element 6507868 or 6171764 1 spare in the box ×2

Tubes and Hoses 4 pieces

  • Hose Rigid 3mm D. 7L / 5.6cm Black Part 75c07 Element 6429334 or 6039885 ×4

Tiles 3 pieces

  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×2
  • Tile 2 x 3 White Part 26603 Element 6552162 or 6550161 ×1

String, Bands and Reels 2 pieces

  • String Cord Medium Thickness (1mm) 150cm Dark Bluish Gray Part 37597c150 Element 6431485 or 6226157 ×1
  • Technic Reel 3 x 2 Dark Bluish Gray Part 32012 Element 32012199 or 4239891 ×1

Plates Round Curved and Dishes 1 piece

  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1

Stickers 1 piece

  • Sticker Sheet for Set 42094-1 [No Color/Any Color] Part 46333 Element 6249567 ×1

Supports, Girders and Cranes 1 piece

  • Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×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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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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