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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 NXT 2.0

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8547 Mindstorms NXT 2.0

621 pieces in 90 part and color combinations.

LEGO counts 619 pieces. This inventory comes from a separate parts catalog and lists 621; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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 207 pieces

  • Technic Pin Double with Axle Hole Black Part 32138 Element 4130597 or 4119589 ×3
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×88
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×10
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×24
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×52
  • 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 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×10
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 ×6
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×6

Technic Beams 147 pieces

  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×8
  • Technic Beam 1 x 11.5 Double Bent Thick Dark Bluish Gray Part 32009 Element 6271155 or 4210668 ×2
  • Technic Beam 1 x 3 Thick Dark Bluish Gray Part 32523 Element 32523199 or 4210751 ×10
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Dark Bluish Gray Part 6629 Element 6279883 or 4210638 ×4
  • Technic Beam 2 x 4 L-Shape Thick Dark Bluish Gray Part 32140 Element 6271830 or 4210667 ×13
  • Technic Beam 3 x 5 L-Shape Thick Dark Bluish Gray Part 32526 Element 4210753 ×14
  • Technic Beam 1 x 11.5 Double Bent Thick Light Bluish Gray Part 32009 Element 6271156 or 4234240 ×4
  • Technic Beam 1 x 5 Thick Light Bluish Gray Part 32316 Element 4211651 ×18
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Light Bluish Gray Part 32348 Element 6278129 or 4211668 ×6
  • Technic Beam 3 x 3 T-Shape Thick Light Bluish Gray Part 60484 Element 4552348 or 4535772 ×2
  • Technic Beam 2 x 4 L-Shape Thick Orange Part 32140 Element 6271832 or 4508664 ×4
  • Technic Beam 1 x 11 Thick Very Light Bluish Gray Part 32525 Element 4534916 or 4297200 ×6
  • Technic Beam 1 x 13 Thick Very Light Bluish Gray Part 41239 Element 4522939 or 4297203 ×10
  • Technic Beam 1 x 15 Thick Very Light Bluish Gray Part 32278 Element 4548305 or 4297197 ×2
  • Technic Beam 1 x 7 Thick Very Light Bluish Gray Part 32524 Element 4495932 or 4297199 ×20
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Very Light Bluish Gray Part 32271 Element 4537417 ×10
  • Technic Beam 1 x 9 Thick Very Light Bluish Gray Part 40490 Element 4297202 ×14

Technic Connectors 105 pieces

  • Technic Axle Connector Double Flexible [Rubber] Black Part 45590 Element 4198367 ×4
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×6
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×5
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×6
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×12
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×5
  • Technic Pin Connector Perpendicular Long Black Part 32557 Element 4143466 ×6
  • Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×4
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×8
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×16
  • Technic Axle and Pin Connector Perpendicular Double Light Bluish Gray Part 32291 Element 6280396 or 4211629 ×4
  • Technic Axle and Pin Connector Perpendicular Double Split Light Bluish Gray Part 41678 Element 4211889 ×8
  • Technic Pin Connector Hub Perpendicular 3 x 3 Bent with 4 Pins (Pin Ridges Across Part) Light Bluish Gray Part 55615 Element 4296059 ×6
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×14
  • Technic Pin Connector Perpendicular 2 x 2 Bent Light Bluish Gray Part 44809 Element 4211880 ×1

Technic Axles 61 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×4
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×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 Light Bluish Gray Part 4519 Element 4211815 ×19
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×8
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×4
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×2
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×9

Technic Bushes 20 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×11
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 ×9

Electronics 16 pieces

  • Cable, Connector, 20cm for NXT Black Part 55804 Element 6089561 or 4297187 ×1
  • Cable, Connector, 35cm for NXT Black Part 55805 Element 6178439 or 6089560 ×4
  • Cable, Connector, 50cm for NXT Black Part 55806 Element 6178448 or 6089559 ×2
  • Cable, USB, 2m for NXT Black Part 57482 Element 4532371 ×1
  • Hub, NXT Brick with Dark Bluish Gray Base [Complete Assembly] Very Light Bluish Gray Part 53788 Element 6034375 or 6006064 ×1
  • Motor, NXT Very Light Bluish Gray Part 53787 Element 6122000 or 4297008 ×3
  • Sensor, Colour, NXT 2.0 Very Light Bluish Gray Part 64892 Element 6045306 or 6034972 ×1
  • Sensor, Touch, NXT Very Light Bluish Gray Part 53793 Element 4296929 ×2
  • Sensor, Ultrasonic, NXT Very Light Bluish Gray Part 53792 Element 6115469 or 4297174 ×1

Projectiles / Launchers 13 pieces

  • Projectile, Large Figure Weapon, Zamor Sphere / Ball Blue Part 54821 Element 4570137 ×3
  • Projectile, Large Figure Weapon, Zamor Sphere / Ball Green Part 54821 Element 4545435 ×3
  • Large Figure Weapon, Zamor Sphere Launcher Pearl Dark Gray Part 54271 Element 4288099 ×1
  • Projectile, Large Figure Weapon, Zamor Sphere / Ball Red Part 54821 Element 4545430 ×3
  • Projectile, Large Figure Weapon, Zamor Sphere / Ball Yellow Part 54821 Element 4545434 ×3

Technic Special 12 pieces

  • Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Orange Part 41669 Element 4281515 or 4175219 ×10

Technic Gears 11 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Black Part 32269 Element 4177430 ×2
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×2
  • Technic Knob Wheel Black Part 32072 Element 6284188 or 4248204 ×4
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×1

Wheels and Tyres 10 pieces

  • Technic Tread Large [36 Links] Black Part 53992 Element 6089573 or 6070518 ×2
  • Tyre 43.2 x 22 ZR Black Part 44309 Element 4184286 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Light Bluish Gray Part 56145 Element 4297210 ×4

Technic Panels 7 pieces

  • Technic Engine Block Half / Side Intake Panel Very Light Bluish Gray Part 61069 Element 4548553 ×3
  • Technic Panel Car Mudguard Left Very Light Bluish Gray Part 61071 Element 4547403 ×2
  • Technic Panel Car Mudguard Right Very Light Bluish Gray Part 61070 Element 4547402 ×2

Technic Steering, Suspension and Engine 4 pieces

  • Technic Link 1 x 9 Black Part 32293 Element 6244698 or 4141300 ×4

Large Buildable Figures 2 pieces

  • Large Figure Weapon, Zamor Sphere Holder Pearl Dark Gray Part 53550 Element 4292468 ×2

String, Bands and Reels 2 pieces

  • Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×2

Gear Parts 1 piece

  • CD-Rom, NXT 2.0 [No Color/Any Color] Part 4558560 ×1

Non-System Parts 1 piece

  • Playmat, Test Mat for Mindstorms NXT 2.0 [No Color/Any Color] Part 4297447 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8547-1 [No Color/Any Color] Part 86116 Element 4548564 ×1

Tiles 1 piece

  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×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.

Keep a record

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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