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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.

Snaptrax S45

Checking

3807 Snaptrax S45

202 pieces in 53 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 149 pieces

  • Cable, Serial, for Spybotics Black Part 4232sc Element 4173183 ×1
  • Hose, Ribbed 7mm D. 10L / 8.0cm Black Part 78c10 Element 4523639 or 4287632 ×1
  • Hose, Ribbed 7mm D. 2L / 1.6cm Black Part 78c02 Element 6253278 or 4296147 ×1
  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 ×4
  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×21
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×8
  • Technic Axle 4 Black Part 3705 Element 370526 ×6
  • Technic Axle 5 Black Part 32073 Element 4114740 ×1
  • Technic Axle 5.5 with Stop [Flat Short End] Black Part 32209 Element 4124045 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×3
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×3
  • Technic Axle Pin with Friction Ridges Lengthwise Black Part 43093 Element 4184170 or 4168884 ×7
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×6
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×1
  • Technic Axle and Pin Connector Angled #4 - 135° Black Part 32192 Element 6262897 or 4121610 ×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 ×9
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×10
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×2
  • Technic Beam 1 x 2 Thick Black Part 43857 Element 4385726 or 4177444 ×2
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×6
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×4
  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×6
  • 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 Bush Black Part 3713 Element 6332148 or 6210506 ×3
  • Technic Pin Connector Round [No Slot] Black Part 75535 Element 75619 ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×17
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×3
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Black Part 41669 Element 4540065 or 4177441 ×2
  • Tread Large, Technic [34 Links] Black Part 71372 Element 4107488 ×2

Light Gray 22 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×3
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×7
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×2
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×3
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×7

Pearl Light Gray 22 pieces

  • Hose, Ribbed 7mm D. 12L / 9.6cm Pearl Light Gray Part 78c12 Element 4157610 ×2
  • Large Figure Shield 5 x 5 with 3 Top Fins Pearl Light Gray Part 41664 Element 4177439 ×1
  • Large Figure Weapon, Claw Hook with Axle Pearl Light Gray Part 32551 Element 4175939 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Pearl Light Gray Part 6538b Element 4177445 or 4177258 ×6
  • Technic Axle and Pin Connector Perpendicular Pearl Light Gray Part 6536 Element 4177420 ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Pearl Light Gray Part 41669 Element 4284480 or 4177440 ×3
  • Technic Tread Hub Pearl Light Gray Part 32007 Element 4281663 or 4177424 ×6

Dark Gray 3 pieces

  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 ×3

Trans-Clear 3 pieces

  • Cable, Fiber Optics 5L Trans-Clear Part 6640c05 Element 4173266 ×1
  • Cable, Fiber Optics, Wide 12L / 9.6cm Trans-Clear Part 40002c12 Element 4173370 ×2

Trans-Red 2 pieces

  • Control Unit / Remote, Spybotics Trans-Red Part 4232rc Element 4173491 ×1
  • Hub / Module, Spybotics Trans-Red Part 4232 Element 4173280 ×1

[No Color/Any Color] 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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