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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.

Technojaw T55

Checking

3809 Technojaw T55

261 pieces in 64 part and color combinations.

LEGO counts 246 pieces. This inventory comes from a separate parts catalog and lists 261; 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 58 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Black Part 43093 Element 4184170 or 4168884 ×15
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×21
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×3
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 ×7
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×3
  • Technic Axle Towball Light Gray Part 2736 Element 273602 ×4
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×3

Technic Axles 45 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×17
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×7
  • Technic Axle 5 Black Part 32073 Element 4114740 ×8
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×8

Technic Connectors 44 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×4
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×5
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×7
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×1
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×1
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×9
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×4
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×2
  • Technic Pin Connector Round [No Slot] Black Part 75535 Element 75619 ×5
  • Technic Axle Connector Ridged [with x Hole x Orientation] Pearl Light Gray Part 6538b Element 4177445 or 4177258 ×2
  • Technic Axle and Pin Connector Perpendicular Double Pearl Light Gray Part 32291 Element 4177432 ×2

Technic Beams 38 pieces

  • Technic Beam 1 x 2 Thick Black Part 43857 Element 4385726 or 4177444 ×4
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×16
  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×2
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×2
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×2
  • Technic Beam 1 x 2 Thin Pearl Light Gray Part 41677 Element 4177728 ×2
  • Technic Beam 1 x 6 Thin Pearl Light Gray Part 32063 Element 4177428 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Pearl Light Gray Part 32348 Element 4173268 ×2
  • Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin Pearl Light Gray Part 32250 Element 4169488 ×4

Technic Bushes 21 pieces

  • Technic Bush Black Part 3713 Element 6332148 or 6210506 ×9
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×3
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×9

Technic Gears 13 pieces

  • Technic Gear 12 Tooth Bevel Black Part 6589 Element 6551139 or 4165426 ×1
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×6
  • Technic Gear 8 Tooth Black Part 3647 Element 4120181 ×2
  • Technic Gear 12 Tooth Double Bevel Light Gray Part 32270 Element 4141454 or 4125322 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Light Gray Part 32269 Element 4141455 ×2

Tubes and Hoses 11 pieces

  • Hose, Ribbed 7mm D. 2L / 1.6cm Black Part 78c02 Element 6253278 or 4296147 ×1
  • Hose, Ribbed 7mm D. 9L / 7.2cm Black Part 78c09 Element 6443871 or 6420612 ×1
  • Hose, Ribbed 7mm D. 2L / 1.6cm Pearl Light Gray Part 78c02 Element 4495192 or 4275384 ×5
  • Hose, Ribbed 7mm D. 6L / 4.8cm Pearl Light Gray Part 78c06 Element 4495202 or 4143468 ×2
  • Hose, Ribbed 7mm D. 9L / 7.2cm Pearl Light Gray Part 78c09 Element 4495206 or 4141671 ×2

Technic Special 9 pieces

  • Technic Cam Black Part 6575 Element 4143187 ×6
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Pearl Light Gray Part 41669 Element 4284480 or 4177440 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Green Part 41669 Element 4163576 ×2

Electronics 7 pieces

  • Cable, Serial, for Spybotics Black Part 4232sc Element 4173183 ×1
  • Cable, Fiber Optics 5L Trans-Clear Part 6640c05 Element 4173266 ×2
  • Cable, Fiber Optics, Wide 12L / 9.6cm Trans-Clear Part 40002c12 Element 4173370 ×2
  • Control Unit / Remote, Spybotics Trans-Green Part 4232rc Element 4173492 ×1
  • Hub / Module, Spybotics Trans-Green Part 4232 Element 4173282 ×1

Wheels and Tyres 6 pieces

  • Tyre 56 x 30 R Balloon Black Part 32180 Element 4119020 ×2
  • Wheel Hard Plastic Spoked Black Part 30324 Element 4173267 or 4121697 ×2
  • Wheel 49.6 x 28 VR (36.8 x 26) with Axle Hole Pearl Light Gray Part 6595 Element 4183284 or 4174928 ×2

String, Bands and Reels 4 pieces

  • Rubber Band Small 13mm (Square Cross Section) Black Part 71509 Element 4141606 or 4107153 ×4

Technic Steering, Suspension and Engine 4 pieces

  • Technic Link 1 x 9 Pearl Light Gray Part 32293 Element 4173236 ×2
  • Technic Steering Arm with 2 Pins Pearl Light Gray Part 32069 Element 4173235 ×2

Gear Parts 1 piece

  • CD-Rom, Spybotics [No Color/Any Color] Part 4177936 Element 4192053 or 4184574 ×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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