Free tool

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.

Nitro Stunt Bike

Checking

8370 Nitro Stunt Bike

89 pieces in 36 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

Technic Beams 19 pieces

  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×2
  • Technic Beam 1 x 2 Thin Blue Part 41677 Element 6360123 or 4186834 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Blue Part 32348 Element 6345498 or 6302340 ×1
  • Technic Beam 1 x 7 Thin Blue Part 32065 Element 6597514 or 6357992 ×2
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Blue Part 6629 Element 6279882 or 4182884 ×2
  • Technic Beam 1 x 4 Thin Dark Gray Part 32449 Element 4154756 ×2
  • Technic Beam 1 x 3 Thin Light Gray Part 6632 Element 4107825 ×1
  • Technic Beam 1 x 5 Thick Light Gray Part 32316 Element 4142140 or 4141494 ×1

Technic Pins 19 pieces

  • 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 ×6
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×2
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×5
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×2

Technic Axles 16 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×3
  • Technic Axle 3 Light Gray Part 4519 Element 4186007 ×3
  • Technic Axle 5 Light Gray Part 32073 Element 4141482 ×6

Technic Bushes 11 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×3
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a 1 spare in the box ×8

Technic Connectors 9 pieces

  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×1
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×2
  • Technic Axle and Pin Connector Perpendicular Double Split Black Part 41678 Element 4162857 ×1
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Gray Part 32015 Element 4106378 ×1
  • Technic Block 3 x 5 x 1 2/3 Pearl Dark Gray Part 32310 Element 4164331 ×2

Technic Special 6 pieces

  • Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Blue Part 41669 Element 4185662 ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Red Part 41669 Element 4163567 ×2

Wheels and Tyres 4 pieces

  • Tyre 43.2 x 22 H Black Part 44308 Element 4184285 ×2
  • Wheel 30.4 x 20 with 3 Pinholes Light Gray Part 44292 Element 4184287 ×2

Large Buildable Figures 1 piece

  • Large Figure Chest Cover, Armor, Toa Nuva Dark Blue Part 43558 Element 4186694 ×1

Mechanical 1 piece

  • Pullback Motor 10 x 5 x 4 Motorcycle [Motor 8] Black Part upn0359 Element 4186656 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8370-1 [No Color/Any Color] Part 45288 Element 4186641 ×1

String, Bands and Reels 1 piece

  • Rubber Band 15mm [Square Cross Section] Black Part 23229 Element 4141604 3 spares in the box ×1

Tiles 1 piece

  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×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.