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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.

Extreme Power Bike

Checking

8371 Extreme Power Bike

98 pieces in 37 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Technic Beams 22 pieces

  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×1
  • Technic Beam 1 x 2 Thin Light Gray Part 41677 Element 4162783 ×2
  • Technic Beam 1 x 3 Thin Light Gray Part 6632 Element 4107825 ×11
  • Technic Beam 1 x 4 Thin Light Gray Part 32449 Element 4141603 ×2
  • Technic Beam 1 x 7 Thin Light Gray Part 32065 Element 4125563 or 4114567 ×2

Technic Axles 18 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×3
  • Technic Axle 6 Black Part 3706 Element 370626 ×1
  • Technic Axle 3 Light Gray Part 4519 Element 4186007 ×5
  • Technic Axle 5 Light Gray Part 32073 Element 4141482 ×5

Technic Bushes 14 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×2
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a 1 spare in the box ×12

Technic Pins 11 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×7

Technic Connectors 10 pieces

  • 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 ×1
  • Technic Axle and Pin Connector Perpendicular Double Dark Gray Part 32291 Element 4140475 or 4130189 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Gray Part 32015 Element 4106378 ×2
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Gray Part 32184 Element 4124443 ×1
  • Technic Block 3 x 5 x 1 2/3 Tan Part 32310 Element 4186780 ×1

Technic Special 5 pieces

  • Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×1
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Red Part 41669 Element 4185661 Also in Trans-Red ×2
  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Red Part 41669 Element 4163567 Also in Red ×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 2 pieces

  • Large Figure Weapon, Claw Hook with Axle Dark Gray Part 32551 Element 4163595 or 4133595 ×2

Plants & Trees 2 pieces

  • Plant, Palm Tree Trunk - Short Connector, Axle Hole with 2 Inside Prongs Light Gray Part 6135 Element 613502 ×2

Technic Gears 2 pieces

  • Technic Gear 20 Tooth Bevel Light Gray Part 32198 Element 4206307 or 4121640 ×2

Technic Panels 2 pieces

  • Technic Panel Fairing # 5 Small Short, Large Hole, Side A Tan Part 32527 Element 4186781 ×1
  • Technic Panel Fairing # 6 Small Short, Large Hole, Side B Tan Part 32528 Element 4186783 or 4158872 ×1

Technic Steering, Suspension and Engine 2 pieces

  • Technic Engine Crankshaft Light Gray Part 2853 Element 4119475 or 285302 ×2

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×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 8371-1 [No Color/Any Color] Part 45289 Element 4186642 ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Bottom Cross Light Gray Part 4150 Element 415052 or 415002 ×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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