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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.

4x4 X-treme Off-Roader

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42099 4x4 X-treme Off-Roader

958 pieces in 133 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 391 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×6
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×40
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×144
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×54
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×18
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×76
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Orange Part 32054 Element 6143033 or 4229603 ×3
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×30
  • Technic Pin with Friction Ridges Lengthwise and Towball Red Part 6628 Element 6254216 ×10
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×2
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×6

Technic Beams 157 pieces

  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×9
  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×4
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×8
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×4
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Black Part 11478 Element 6327028 or 6030286 ×6
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Black Part 6629 Element 6279881 or 4119800 ×6
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×21
  • Technic Connector Beam 3 x 3 Black Part 39793 Element 6265644 ×5
  • Technic Beam 1 x 2 Thick Blue Part 43857 Element 6057802 or 4185665 ×1
  • Technic Beam 1 x 11.5 Double Bent Thick Bright Light Orange Part 32009 Element 6476808 or 6327415 ×2
  • Technic Beam 1 x 15 Thick Bright Light Orange Part 32278 Element 6275898 ×2
  • Technic Beam 1 x 3 Thick Bright Light Orange Part 32523 Element 6418455 or 6275899 ×4
  • Technic Beam 1 x 5 Thick Bright Light Orange Part 32316 Element 6203256 or 4248239 ×1
  • Technic Beam 2 x 4 L-Shape Thick Dark Azure Part 32140 Element 6534873 or 6330139 ×1
  • Technic Beam 1 x 13 Thick Dark Bluish Gray Part 41239 Element 4522937 or 4261932 ×3
  • Technic Beam 1 x 3 Thin Dark Bluish Gray Part 6632 Element 6632199 or 6364452 ×12
  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 ×12
  • Technic Beam 1 x 9 Thick Dark Bluish Gray Part 40490 Element 4645730 or 4210757 ×4
  • Technic Beam 3 x 5 L-Shape Thick Dark Bluish Gray Part 32526 Element 4210753 ×11
  • Technic Beam 1 x 7 Thick Light Bluish Gray Part 32524 Element 4495930 or 4211665 ×7
  • Technic Beam 3 x 3 T-Shape Thick Light Bluish Gray Part 60484 Element 4552348 or 4535772 ×7
  • Technic Beam 1 x 3 Thick Lime Part 32523 Element 6170474 or 4265684 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Orange Part 60483 Element 6265128 or 6057526 ×14
  • Technic Beam 1 x 2 Thin Red Part 41677 Element 6371442 or 4186678 ×6
  • Technic Beam 1 x 5 Thick White Part 32316 Element 4249021 or 4140465 ×1
  • Technic Beam Triangle Thin [Type II] Yellow Part 99773 Element 6331435 or 6010863 ×2

Technic Connectors 156 pieces

  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×14
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×5
  • Technic Axle and Pin Connector Angled #4 - 135° Black Part 32192 Element 6262897 or 4121610 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×2
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×26
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×10
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×4
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×13
  • Technic Axle and Pin Connector Toggle Joint Smooth Black Part 32126 Element 6457112 or 6322045 ×4
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×10
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Blue Part 15100 Element 6203249 ×4
  • Wire Clip with Axle Hole Blue Part 49283 Element 6263071 ×1
  • Technic Axle and Pin Connector Angled #2 - 180° Light Bluish Gray Part 32034 Element 6346487 or 4211567 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Bluish Gray Part 32015 Element 6271347 or 4211551 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Bluish Gray Part 32184 Element 6276969 or 4211621 ×5
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×2
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×5
  • Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×1
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Light Bluish Gray Part 87082 Element 4560175 ×6
  • Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Orange Part 59443 Element 6143028 ×1
  • Technic Axle and Pin Connector Perpendicular Double Split Orange Part 41678 Element 6259823 or 4173542 ×4
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Red Part 42003 Element 6273712 or 4175442 ×4
  • Technic Pin Connector Hub with 1 Axle Red Part 22961 Element 6167939 ×2
  • Wire Clip with Axle Hole Red Part 49283 Element 6263067 ×1
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×1
  • Technic Pin Connector Round 1L [Beam] White Part 18654 Element 6550155 or 6177114 1 spare in the box ×17
  • Wire Clip with Axle Hole White Part 49283 Element 6278194 ×1
  • Technic Axle Connector with Axle Hole Yellow Part 32039 Element 4107800 or 3203924 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Yellow Part 32184 Element 6276974 or 6037676 ×1

Technic Axles 99 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×6
  • Technic Axle 4 Black Part 3705 Element 370526 ×10
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×7
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×23
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×1
  • Technic Axle 10 Red Part 3737 Element 6130005 or 4267858 ×1
  • Technic Axle 12 Red Part 3708 Element 6147702 or 4125190 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×29
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×8
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×5
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×5

Technic Steering, Suspension and Engine 33 pieces

  • Technic Link 1 x 6 without Stoppers Black Part 32005a Element 4629921 or 4530733 ×8
  • Technic Steering / CV Ball Joint Female with 3L Axle Dark Bluish Gray Part 52730 Element 6261793 ×4
  • Technic Steering Arm 5.5 x 2 with Towball Socket Rounded, Chamfered Dark Bluish Gray Part 57515 Element 6074651 or 4523398 ×4
  • Technic Steering / CV Ball Joint Male 3L Light Bluish Gray Part 52731 Element 6262968 ×8
  • Technic Steering Wheel Hub with Planetary Gear Reduction Light Bluish Gray Part 46490 Element 6365803 or 6324050 ×4
  • Technic Steering Wheel Small (3 Studs Diameter) Light Bluish Gray Part 2819 Element 4580510 or 4211578 ×1
  • Technic Shock Absorber 6.5L with Hard Spring, Tight Coil in Middle [Complete Assembly] Red Part 76537 Element 6144791 ×4

Technic Gears 24 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×5
  • Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×1
  • Technic Turntable Large Type 3 Top, 60 Tooth Black Part 18938 Element 6109283 ×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 Turntable Large Type 3 Base Light Bluish Gray Part 18939 Element 6109285 ×2
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×6
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×6

Technic Panels 20 pieces

  • Technic Panel 3 x 11 x 1 Black Part 15458 Element 6080356 ×1
  • Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface Black Part 11954 Element 6031916 ×3
  • Technic Panel Fairing #21 5L Small Smooth, Side B Black Part 11946 Element 6316923 or 6023036 ×1
  • Technic Panel Fairing #22 5L Small Smooth, Side A Black Part 11947 Element 6319983 or 6022761 ×1
  • Technic Panel 3 x 11 x 1 Bright Light Orange Part 15458 Element 6275893 ×3
  • Technic Panel 5 x 11 x 1 Bright Light Orange Part 64782 Element 6275892 ×1
  • Technic Panel 5 x 11 x 1 Tapered Bright Light Orange Part 18945 Element 6275894 ×2
  • Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface Bright Light Orange Part 62531 Element 6275897 ×2
  • Technic Panel Fairing #1 Small Smooth Short, Side A Bright Light Orange Part 87080 Element 6275900 ×1
  • Technic Panel Fairing #17 Large Smooth, Side A Bright Light Orange Part 64392 Element 6275895 ×1
  • Technic Panel Fairing #18 Large Smooth, Side B Bright Light Orange Part 64682 Element 6275896 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B Bright Light Orange Part 87086 Element 6275901 ×1
  • Technic Panel Curved and Bent 6 x 3 Light Bluish Gray Part 24116 Element 6268004 or 6176758 ×2

Plates 14 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×2
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×6
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 1 spare in the box ×2
  • Plate 1 x 2 Trans-Red Part 3023 Element 6514003 or 6240212 ×2

Tiles 14 pieces

  • Tile 1 x 1 with Groove Trans-Clear Part 3070b Element 6581822 or 6254254 1 spare in the box ×10
  • Tile 1 x 2 with Groove Trans-Clear Part 3069b Element 6514223 or 6251294 ×2
  • Tile 1 x 1 with Groove Trans-Orange Part 3070b Element 6514258 or 6254252 1 spare in the box ×2

Bricks Round and Cones 12 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 ×12

Technic Beams Special 9 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Black Part 33299b Element 4563044 ×2
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×2
  • 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 ×3

Technic Bushes 8 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×6
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×2

Wheels and Tyres 8 pieces

  • Tyre 107 x 44 Tractor Black Part 23798 Element 6141782 ×4
  • Wheel 56 x 34 Technic Racing Medium with 6 Pin Holes Black Part 15038 Element 6284703 or 6253256 ×4

Electronics 4 pieces

  • Motor, Large, Powered Up Dark Bluish Gray Part 22169 Element 6545732 or 6456189 ×1
  • Motor, XL, Powered Up Dark Bluish Gray Part 22172 Element 6214088 ×2
  • Hub, Powered Up 4-Port (Technic Control+) - Clip Opening Light Bluish Gray Part 22127 Element 6142536 ×1

Plates Round Curved and Dishes 4 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Clear Part 2654 Element 6581772 or 6163901 ×2

Bars, Ladders and Fences 2 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 ×2

Tubes and Hoses 2 pieces

  • Hose Rigid 3mm D. 14L / 11.2cm Black Part 75c14 Element 6434156 or 6113961 1 spare in the box ×2

Stickers 1 piece

  • Sticker Sheet for Set 42099-1 [No Color/Any Color] Part 51341 Element 6259025 ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

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