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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.

All-Terrain Vehicle

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42139 All-Terrain Vehicle

764 pieces in 131 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 219 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×10
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Black Part 65304 Element 6321745 ×9
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×58
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×27
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×23
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×54
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×5
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Orange Part 65304 Element 6347790 ×4
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×20
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Red Part 65304 Element 6347789 ×2
  • Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole Red Part 66906 Element 6360104 ×3
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×1
  • Technic Pin Long without Friction Ridges, with Anti-Roll Notch Tan Part 39888 Element 6321305 ×2

Technic Connectors 156 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×5
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×4
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×2
  • Technic Axle and Pin Connector Perpendicular Double Split [Reinforced] Black Part 69819 Element 6349281 ×2
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×4
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Black Part 42195 Element 6286381 ×6
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×6
  • Technic Pin Connector Hub with 2 Perpendicular Axles Black Part 10197 Element 6099801 or 6098801 ×5
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×15
  • Technic Pin Connector Round [Slotted] Black Part 62462 Element 6173119 or 4526982 ×2
  • Technic Pin Connector Hub with 2 Axles Dark Bluish Gray Part 27940 Element 6167281 ×1
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×8
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Bluish Gray Part 32184 Element 6276969 or 4211621 ×12
  • Technic Axle and Pin Connector Perpendicular Split Light Bluish Gray Part 92907 Element 6279023 or 4630114 ×2
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×16
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) Light Bluish Gray Part 65489 Element 6282158 ×4
  • Technic Pin Connector Round 1L [Beam] Light Bluish Gray Part 18654 Element 6183784 1 spare in the box ×3
  • Technic Axle Connector Smooth [with x Hole + Orientation] Orange Part 59443 Element 6143028 ×11
  • Technic Axle and Pin Connector Angled #1 Red Part 32013 Element 6332580 or 4254606 ×17
  • Technic Axle and Pin Connector Angled #2 - 180° Red Part 32034 Element 6351572 or 4234429 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Red Part 42003 Element 6273712 or 4175442 ×6
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] Red Part 44874 Element 6323573 ×5
  • Technic Pin Connector Round [Slotted] Red Part 62462 Element 6173126 or 4526984 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] White Part 59443 Element 6212049 ×2
  • Technic Axle Connector with Axle Hole [Reinforced] White Part 42135 Element 6375684 ×7
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×1
  • Technic Pin Connector Hub with 1 Axle White Part 22961 Element 6179606 ×5

Technic Beams 119 pieces

  • Technic Beam 1 x 11 Thick with Alternating Holes Black Part 73507 Element 6330585 ×2
  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×21
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×2
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×4
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×3
  • Technic Beam 1 x 4 Thin with Stud Connector Black Part 2825 Element 6331570 or 4107136 ×4
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Black Part 11478 Element 6327028 or 6030286 ×8
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×5
  • Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick Black Part 71708 Element 6326047 ×2
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×8
  • Technic Beam 3 x 3 L-Shape Thin Black Part 32056 Element 6271810 or 4112287 ×1
  • Technic Beam 1 x 11 Thick Dark Bluish Gray Part 32525 Element 4603472 or 4534914 ×2
  • Technic Beam 1 x 7 Thin Dark Bluish Gray Part 32065 Element 6529341 or 6271589 ×2
  • Technic Beam 1 x 9 Thick Dark Bluish Gray Part 40490 Element 4645730 or 4210757 ×7
  • Technic Beam 3 x 3 T-Shape Thick Dark Bluish Gray Part 60484 Element 4552349 or 4535773 ×8
  • Technic Beam Triangle Thin [Type II] Dark Bluish Gray Part 99773 Element 6331431 or 6010862 ×2
  • Technic Connector Beam 3 x 3 Dark Bluish Gray Part 39793 Element 6317653 ×1
  • Technic Beam 1 x 5 Thick Light Bluish Gray Part 32316 Element 4211651 ×4
  • Technic Beam 3 x 5 L-Shape Thick Light Bluish Gray Part 32526 Element 4211713 ×4
  • Technic Beam 1 x 11.5 Double Bent Thick Orange Part 32009 Element 6285293 or 6271162 ×4
  • Technic Beam 1 x 15 Thick Orange Part 32278 Element 6358259 or 6135083 ×2
  • Technic Beam 1 x 7 Thick Orange Part 32524 Element 6339024 or 6102621 ×2
  • Technic Beam 1 x 3 Thin Red Part 6632 Element 6364451 or 4107824 ×6
  • Technic Beam 1 x 4 Thin Red Part 32449 Element 6330205 or 4141811 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole White Part 60483 Element 6265135 or 6177268 ×2
  • Technic Beam 1 x 7 Thick White Part 32524 Element 6564912 or 6318056 ×5
  • Technic Beam 1 x 9 Thick White Part 40490 Element 6001831 or 4156341 ×2

Technic Axles 100 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×12
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×17
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×36
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×15
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×1
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×2
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×2
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×10

Technic Gears 29 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×4
  • Technic Knob Wheel Black Part 32072 Element 6284188 or 4248204 ×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 Driving Ring 3L Dark Bluish Gray Part 18947 Element 6100931 ×1
  • Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×2
  • Technic Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth [Beveled Edge] Dark Bluish Gray Part 62821b Element 4562210 or 4525184 ×2
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×1
  • Technic Turntable Small Top Light Bluish Gray Part 99009 Element 4652235 ×2
  • 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 ×7
  • Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×1
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×3

Bricks Round and Cones 26 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 ×6
  • Brick Round 2 x 2 [Grill] Reddish Brown Part 92947 Element 6036503 ×20

Technic Special 22 pieces

  • Technic Link, Reinforced, with Beveled Edge Black Part 14696 Element 6044702 1 spare in the box ×21
  • Technic Changeover Catch - New Style Red Part 51149 Element 6313493 ×1

Technic Panels 21 pieces

  • Technic Panel 3 x 11 x 1 Black Part 15458 Element 6080356 ×4
  • Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface Black Part 24119 Element 6150082 ×2
  • Technic Panel Curved and Bent 6 x 3 Black Part 24116 Element 6268012 or 6133246 ×1
  • Technic Panel 5 x 11 x 1 Dark Bluish Gray Part 64782 Element 6207990 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B Orange Part 11946 Element 6340604 or 6022767 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A Orange Part 11947 Element 6352662 or 6286428 ×2
  • Technic Panel Curved and Bent 6 x 3 White Part 24116 Element 6268001 or 6133244 ×4
  • Technic Panel Fairing #21 5L Small Smooth, Side B White Part 11946 Element 6330084 or 6114580 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A White Part 11947 Element 6343987 or 6114583 ×2

Technic Bushes 14 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 ×5
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×7
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×2

Technic Steering, Suspension and Engine 14 pieces

  • Technic Engine Connecting Rod Light Bluish Gray Part 2852 Element 6000018 or 4655728 ×2
  • Technic Engine Cylinder without Side Slots, with Bottom Slots Light Bluish Gray Part 2850b Element 6514436 or 6383961 ×2
  • Technic Shock Absorber 6.5L with Soft Spring, Tight Coil, Black Piston Rod [Complete Assembly] Light Bluish Gray Part 89953c01 Element 6378472 ×6
  • Technic Engine Crankshaft Yellow Part 2853 Element 6640378 or 4119474 ×2
  • Technic Engine Piston Round Yellow Part 2851 Element 4112203 or 285124 ×2

Wheels and Tyres 12 pieces

  • Tyre 56 x 26 Tractor Black Part 70695 Element 6325260 ×6
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Black Part 56145 Element 4299389 or 4284946 ×6

Technic Beams Special 7 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Black Part 61408 Element 6313520 ×4
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×3

Tiles Round and Curved 7 pieces

  • Tile Round 1 x 1 Orange Part 98138 Element 6284582 or 6009459 1 spare in the box ×2
  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×5

Bars, Ladders and Fences 6 pieces

  • Bar 3L Black Part 87994 Element 6185316 or 6093525 1 spare in the box ×2
  • Bar 1 x 3 (Radio Handle, Phone Handset) Dark Bluish Gray Part 6190 Element 4210676 ×4

Tiles 4 pieces

  • Tile 1 x 2 with Groove Trans-Clear Part 3069b Element 6514223 or 6251294 ×2
  • Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×2

String, Bands and Reels 3 pieces

  • String Cord Thin (0.5mm) 50cm Black Part 56823c50 Element 6530026 or 6489925 ×1
  • String Reel 2 x 1 x 2 Drum with Axle Hole Light Bluish Gray Part 61510 Element 4521532 ×1
  • Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×1

Plates Round Curved and Dishes 2 pieces

  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box ×2

Bricks Wedged 1 piece

  • Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 Studs Orange Part 52031 Element 6224785 or 4505118 ×1

Stickers 1 piece

  • Sticker Sheet for Set 42139-1 [No Color/Any Color] Part 80229 Element 6362706 ×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

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