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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.

4 x 4 Crawler

Checking

9398 4 x 4 Crawler

1,327 pieces in 158 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 507 pieces

  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×10
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 6 spares in the box ×203
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×8
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×108
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×4
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×95
  • Technic Pin 3/4 Dark Bluish Gray Part 32002 Element 32002199 or 4211050 2 spares in the box ×3
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×11
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×44
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×10
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×3
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×4

Technic Beams 231 pieces

  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×3
  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×2
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 Also in Dark Bluish Gray ×1
  • Technic Beam 1 x 2 Thick Black Part 43857 Element 4385726 or 4177444 ×8
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×4
  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×4
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 Also in Dark Bluish Gray ×1
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×3
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Black Part 6629 Element 6279881 or 4119800 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Black Part 32271 Element 6276835 or 4140327 ×2
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×14
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×9
  • Technic Beam Triangle Thin [Type II] Black Part 99773 Element 6331437 or 6010864 ×4
  • Technic Beam 1 x 2 Thin Blue Part 41677 Element 6360123 or 4186834 ×3
  • Technic Beam 1 x 13 Thick Dark Bluish Gray Part 41239 Element 4522937 or 4261932 Also in Black ×1
  • Technic Beam 1 x 3 Thick Dark Bluish Gray Part 32523 Element 32523199 or 4210751 ×2
  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 Also in Black ×1
  • Technic Beam 1 x 11 Thick Light Bluish Gray Part 32525 Element 4611705 or 4534910 ×2
  • Technic Beam 1 x 15 Thick Light Bluish Gray Part 32278 Element 4542577 or 4211770 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×13
  • Technic Beam 1 x 2 Thin Light Bluish Gray Part 41677 Element 6348143 or 4211741 ×4
  • Technic Beam 1 x 3 Thick Light Bluish Gray Part 32523 Element 4211655 ×6
  • Technic Beam 1 x 6 Thin Light Bluish Gray Part 32063 Element 6170293 or 4211586 ×2
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Light Bluish Gray Part 32348 Element 6278129 or 4211668 ×4
  • Technic Beam 1 x 9 Thick Light Bluish Gray Part 40490 Element 6102449 or 4211866 ×2
  • Technic Beam 3 x 3 L-Shape Thin Light Bluish Gray Part 32056 Element 6271815 or 4211574 ×2
  • Technic Beam 1 x 13 Thick Orange Part 41239 Element 4629802 or 4164424 ×2
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Orange Part 32348 Element 6278133 or 6102616 ×4
  • Technic Beam 2 x 4 L-Shape Thick Orange Part 32140 Element 6271832 or 4508664 ×2
  • Technic Beam 3 x 5 L-Shape Thick Orange Part 32526 Element 6143015 or 4626639 ×2
  • Technic Beam 1 x 11 Thick Red Part 32525 Element 4562805 or 4534913 ×10
  • Technic Beam 1 x 13 Thick Red Part 41239 Element 4522938 or 4262082 ×10
  • Technic Beam 1 x 15 Thick Red Part 32278 Element 4542575 or 4163147 ×6
  • Technic Beam 1 x 2 Thick Red Part 43857 Element 4185664 ×6
  • Technic Beam 1 x 3 Thick Red Part 32523 Element 4153718 ×2
  • Technic Beam 1 x 3 Thin Red Part 6632 Element 6364451 or 4107824 ×5
  • Technic Beam 1 x 5 Thick Red Part 32316 Element 4142132 or 4128589 ×16
  • Technic Beam 1 x 7 Thick Red Part 32524 Element 4495933 or 4162098 ×6
  • Technic Beam 1 x 9 Thick Red Part 40490 Element 4645733 or 4192225 ×7
  • Technic Beam 2 x 4 L-Shape Thick Red Part 32140 Element 6271827 or 4141270 ×24
  • Technic Beam 3 x 5 L-Shape Thick Red Part 32526 Element 4143154 ×4
  • Technic Beam 1 x 11 Thick White Part 32525 Element 6028103 or 4296265 ×2
  • Technic Beam 1 x 11.5 Double Bent Thick White Part 32009 Element 6271161 or 6004157 ×2
  • Technic Beam 1 x 15 Thick White Part 32278 Element 4542578 or 4227533 ×1
  • Technic Beam 1 x 2 Thin White Part 41677 Element 6371416 or 4163533 ×4
  • Technic Beam 1 x 5 Thick White Part 32316 Element 4249021 or 4140465 ×3
  • Technic Beam 1 x 7 Bent (4 - 4) Thick White Part 32348 Element 6278132 or 4509912 ×4
  • Technic Beam 1 x 9 Bent (7 - 3) Thick White Part 32271 Element 6276842 or 6004144 ×2
  • Technic Beam 3 x 5 L-Shape Thick White Part 32526 Element 6632144 or 4585040 ×2
  • Technic Beam 1 x 7 Thick Yellow Part 32524 Element 4495934 or 4187082 ×2

Technic Connectors 228 pieces

  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×10
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×5
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×4
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×6
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×3
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×2
  • Technic Axle and Pin Connector Perpendicular Split Black Part 92907 Element 6279021 or 4610371 ×12
  • Technic Axle and Pin Connector Toggle Joint Smooth Black Part 32126 Element 6457112 or 6322045 ×4
  • Technic Pin Connector Round [Slotted] Black Part 62462 Element 6173119 or 4526982 ×14
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Dark Bluish Gray Part 42003 Element 6273715 or 4210857 ×8
  • Technic Axle and Pin Connector Perpendicular Double Split Dark Bluish Gray Part 41678 Element 4234599 ×8
  • Technic Pin Connector Hub with 2 Perpendicular Axles Dark Bluish Gray Part 10197 Element 6005331 ×2
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Light Bluish Gray Part 6553 Element 4211536 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×14
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×4
  • Technic Axle and Pin Connector Angled #1 Light Bluish Gray Part 32013 Element 6296859 or 4211550 ×2
  • Technic Axle and Pin Connector Angled #2 - 180° Light Bluish Gray Part 32034 Element 6346487 or 4211567 ×8
  • Technic Axle and Pin Connector Angled #3 - 157.5° Light Bluish Gray Part 32016 Element 6261387 or 4211552 ×8
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Bluish Gray Part 32015 Element 6271347 or 4211551 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Light Bluish Gray Part 32014 Element 6268924 or 4509886 ×2
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×28
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×19
  • Technic Axle and Pin Connector Perpendicular Double 4L Light Bluish Gray Part 98989 Element 6308440 or 4652234 ×4
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×3
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×4
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Light Bluish Gray Part 87082 Element 4560175 ×18
  • Technic Pin Connector Perpendicular 2 x 2 Bent Light Bluish Gray Part 44809 Element 4211880 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Orange Part 32016 Element 6366185 or 6251180 ×4
  • Technic Axle Connector Smooth [with x Hole + Orientation] Red Part 59443 Element 4513174 ×16
  • Technic Axle and Pin Connector Perpendicular Double Split Red Part 41678 Element 4173975 ×4
  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×4

Technic Axles 174 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×10
  • Technic Axle 6 Black Part 3706 Element 370626 ×4
  • 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 ×2
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×4
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×46
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×17
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×8
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×9
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×57
  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×8

Technic Bushes 62 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 2 spares in the box ×24
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 3 spares in the box ×26
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 2 spares in the box ×12

Technic Gears 39 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×12
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×1
  • Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×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 ×4
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 1 spare in the box ×6
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Tan Part 32269 Element 4514555 ×12

Technic Steering, Suspension and Engine 27 pieces

  • Technic Link 1 x 6 without Stoppers Black Part 32005a Element 4629921 or 4530733 ×4
  • Technic Steering Wheel Small (3 Studs Diameter) Black Part 2819 Element 4580509 or 4160709 ×1
  • Technic Steering Ball Joint Large Receptacle Dark Bluish Gray Part 92911 Element 4610380 ×2
  • Technic Steering Hub for Portal Axle Dark Bluish Gray Part 92909 Element 4610378 ×4
  • Technic Steering Ball Joint Large Open with C-Shape Pivot Frame Light Bluish Gray Part 92910 Element 4610379 ×2
  • Technic Steering Portal Axle Housing Light Bluish Gray Part 92908 Element 6342037 or 4610377 ×4
  • Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×6
  • Technic Shock Absorber 9.5L with Extra Hard Spring Yellow Part 95292c01 Element 6083113 or 4619319 ×4

Technic Panels 19 pieces

  • Technic Panel 5 x 11 x 1 Black Part 64782 Element 4566243 ×2
  • Technic Panel Fairing #13 Large Short Smooth, Side A Black Part 64394 Element 4558775 ×3
  • Technic Panel Fairing #14 Large Short Smooth, Side B Black Part 64680 Element 4558740 ×3
  • Technic Panel Fairing #17 Large Smooth, Side A Black Part 64392 Element 4541326 ×1
  • Technic Panel Fairing #18 Large Smooth, Side B Black Part 64682 Element 4543490 ×1
  • Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface Orange Part 62531 Element 4580022 ×2
  • Technic Panel Fairing #1 Small Smooth Short, Side A Orange Part 87080 Element 6370445 or 6303434 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B Orange Part 87086 Element 6370444 or 6303436 ×1
  • Technic Panel 5 x 11 x 1 White Part 64782 Element 6004135 or 4580019 ×1
  • Technic Panel Curved 11 x 3 with 2 Pin Holes through Panel Surface White Part 62531 Element 6004137 ×2
  • Technic Panel Fairing #1 Small Smooth Short, Side A White Part 87080 Element 4558878 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B White Part 87086 Element 4558874 ×1

Plates Round Curved and Dishes 12 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×4
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Clear Part 2654 Element 6581772 or 6163901 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

Wheels and Tyres 10 pieces

  • Tyre 94.8 x 44 R Balloon Black Part 54120 Element 6005202 or 4291178 ×4
  • Wheel 56 x 34 Technic Racing Medium with 3 Pin Holes Black Part 44772 Element 6005203 or 4262086 ×4
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×2

Electronics 6 pieces

  • Battery Box, Power Functions 4 x 11 x 7 with Orange Switch and Dark Bluish Gray Covers [Complete Assembly] Light Bluish Gray Part 58119 Element 4506078 ×1
  • Control Unit, IR, Power Functions, with Dark Bluish Gray Bottom Light Bluish Gray Part 58122 Element 6225576 or 6074396 ×1
  • Motor, Large, Power Functions with Dark Bluish Gray Bottom Light Bluish Gray Part 99499 Element 6263044 or 6211504 ×2
  • Motor, Servo, Power Functions with Dark Bluish Gray Bottom Light Bluish Gray Part 99498 Element 6132522 or 6000566 ×1
  • Receiver Unit, IR, Power Functions, with V2 Print Light Bluish Gray Part 58123b Element 6034993 or 6020087 ×1

Technic Beams Special 4 pieces

  • 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

Technic Special 4 pieces

  • Technic Ball Joint Black Part 32474 Element 4290713 or 4143539 ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Black Part 41669 Element 4540065 or 4177441 ×2

Tiles Special 2 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Blue Part 2412b Element 241223 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Orange Part 2412b Element 4125254 or 3933106 ×1

Stickers 1 piece

  • Sticker Sheet for Set 9398-1 [No Color/Any Color] Part 10772 Element 6006511 ×1

Tiles 1 piece

  • Tile 1 x 4 with Train Controls Print Dark Bluish Gray Part 2431pr0028 Element 6020825 or 4215740 ×1

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

When a piece really is missing

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