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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.

Mindstorms EV3

Checking

31313 Mindstorms EV3

601 pieces in 102 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

Black 259 pieces

  • Cable, Connector, 25cm for EV3 Black Part 11145 Element 6178438 or 6024581 ×4
  • Cable, Connector, 35cm for NXT Black Part 55805 Element 6178439 or 6089560 ×2
  • Cable, Connector, 50cm for NXT Black Part 55806 Element 6178448 or 6089559 ×1
  • Cable, USB, 2m for EV3 Black Part 10916 Element 6192039 or 6036901 ×1
  • Large Figure Weapon, Zamor Sphere Holder Black Part 53550 Element 6286430 or 6024109 ×1
  • Large Figure Weapon, Zamor Sphere Launcher Black Part 54271 Element 6024106 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×9
  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×12
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×4
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×10
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×12
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×10
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×4
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×6
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Black Part 32271 Element 6276835 or 4140327 ×12
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×8
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×8
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×4
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×6
  • Technic Cam Black Part 6575 Element 4143187 ×2
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×4
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×5
  • Technic Knob Wheel Black Part 32072 Element 6284188 or 4248204 ×4
  • Technic Link 1 x 6 without Stoppers Black Part 32005a Element 4629921 or 4530733 ×2
  • Technic Link 1 x 9 Black Part 32293 Element 6244698 or 4141300 ×4
  • Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Black Part 87408 Element 6278412 or 4558692 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×95
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×6
  • Technic Tread Large [36 Links] Black Part 53992 Element 6089573 or 6070518 ×2
  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×3
  • Tyre 14 x 6 Solid Smooth Black Part 50951 Element 4246901 ×2
  • Tyre 43.2 x 22 ZR Black Part 44309 Element 4184286 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Black Part 56145 Element 4299389 or 4284946 ×4

Red 114 pieces

  • Large Figure Weapon Sword, 11.5L with Sawtooth Back with Flat Silver Blade Red Part 98568pat0002 Element 6286140 or 4657296 ×6
  • Projectile, Large Figure Weapon, Zamor Sphere / Ball Red Part 54821 Element 4545430 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×12
  • Technic Axle Connector Smooth [with x Hole + Orientation] Red Part 59443 Element 4513174 ×3
  • Technic Axle and Pin Connector Angled #1 Red Part 32013 Element 6332580 or 4254606 ×4
  • Technic Axle and Pin Connector Angled #2 - 180° Red Part 32034 Element 6351572 or 4234429 ×6
  • Technic Axle and Pin Connector Angled #4 - 135° Red Part 32192 Element 6262898 or 4271646 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Red Part 32014 Element 6268922 or 4189131 ×1
  • Technic Axle and Pin Connector Perpendicular Red Part 6536 Element 6261373 or 4188298 ×8
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Red Part 42003 Element 6273712 or 4175442 ×14
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Red Part 32184 Element 6276963 or 4128598 ×17
  • Technic Axle and Pin Connector Perpendicular Double Red Part 32291 Element 6280393 or 4241474 ×2
  • Technic Axle and Pin Connector Perpendicular Double Split Red Part 41678 Element 4173975 ×4
  • Technic Beam 1 x 11 Thick Red Part 32525 Element 4562805 or 4534913 ×4
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×9
  • 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 Rubber Belt Medium [24mm ID] [Round Cross Section] Red Part 85544 Element 4544145 or 4544143 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Red Part 41669 Element 4185661 ×6

Light Bluish Gray 99 pieces

  • Motor, Large, EV3 with White Case Light Bluish Gray Part 95658 Element 6219427 or 6148278 ×2
  • Motor, Medium, EV3 with White Case Light Bluish Gray Part 99455 Element 6230508 or 6148292 ×1
  • Sensor, Colour, EV3 with White Case Light Bluish Gray Part 95650 Element 6239012 or 6128869 ×1
  • Sensor, Infrared, EV3 Light Bluish Gray Part 95654 Element 6227940 or 6132629 ×1
  • Sensor, Touch, EV3 with White Case Light Bluish Gray Part 95648 Element 6227941 or 6138404 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×22
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×9
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×2
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×1
  • Technic Axle Connector Hub with 3 Axles at 120° Light Bluish Gray Part 57585 Element 4502595 ×1
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×2
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×6
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Light Bluish Gray Part 32068 Element 6273321 or 6013936 ×4
  • 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 ×2
  • Technic Beam 1 x 3 Thin Light Bluish Gray Part 6632 Element 6360043 or 4211566 ×1
  • 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 Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×12
  • 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 Pin Double with Axle Hole Light Bluish Gray Part 32138 Element 4211888 ×4
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4
  • Technic Wedge Belt Wheel [aka Pulley] Light Bluish Gray Part 4185 Element 6321743 or 4494222 ×3
  • Technic Worm Gear Type 2 Light Bluish Gray Part 32905 Element 6185471 ×2
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×4

Blue 66 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×28
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×38

White 24 pieces

  • Control Unit, IR-Beacon / Remote Handset, EV3 White Part 72156 Element 6127283 or 6093253 ×1
  • Hub, EV3 Brick [Complete Assembly] White Part 95646c01 Element 6261688 or 6187080 ×1
  • Technic Panel Car Mudguard Left White Part 61071 Element 6015597 or 4540101 ×1
  • Technic Panel Car Mudguard Right White Part 61070 Element 6015596 or 4540100 ×1
  • Technic Panel Fairing # 3 Small Smooth Long, Side A White Part 64683 Element 4547581 ×3
  • Technic Panel Fairing # 4 Small Smooth Long, Side B White Part 64391 Element 4547582 ×3
  • Technic Panel Fairing #5 Long Smooth, Side A White Part 64681 Element 4558802 ×3
  • Technic Panel Fairing #6 Long Smooth, Side B White Part 64393 Element 4558797 ×3
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] White Part 41669 Element 4173941 ×4
  • Wing / Blade 1 x 4 with Pin Hole White Part 98347 Element 4656205 ×4

Dark Bluish Gray 14 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×4
  • 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 ×6
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×2

Yellow 11 pieces

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

Tan 9 pieces

  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×3
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×1
  • Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×1
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×4

Dark Tan 4 pieces

  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×4

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 31313-1 [No Color/Any Color] Part 13710 Element 6031766 ×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

Buy the piece

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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