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.

TECHNIC Gear Wheels

Checking

10076 TECHNIC Gear Wheels

39 pieces in 19 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.

Show

Piece checklist

Technic Gears 35 pieces

  • Technic Turntable Large Type 1, 56 Tooth with Trans-Clear Top [Complete Assembly] Black Part 2856c02 ×1
  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×2
  • Technic Gear 16 Tooth with Clutch [Toothed] Dark Gray Part 6542a Element 654277 or 654227 ×2
  • Technic Gear Differential, 24 -16 Tooth with Clutch on Both Sides Dark Gray Part 6573 Element 657327 ×1
  • Technic Knob Wheel Dark Gray Part 32072 Element 4174349 ×2
  • Technic Arm 1 x 7 with 9 Tooth Double Bevel Gear Ends Light Gray Part 41666 Element 4162071 ×2
  • Technic Arm 2 x 5 with 1/4 Gear 8 Tooth Double Bevel Light Gray Part 41667 Element 4162072 ×2
  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×5
  • Technic Gear 12 Tooth Double Bevel Light Gray Part 32270 Element 4141454 or 4125322 ×2
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×2
  • Technic Gear 20 Tooth Bevel Light Gray Part 32198 Element 4206307 or 4121640 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Light Gray Part 32269 Element 4141455 ×2
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Gray Part 3650c Element 365002 ×2
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Light Gray Part 3648b Element 4107543 or 364802 ×2
  • Technic Gear 36 Tooth Double Bevel Light Gray Part 32498 Element 4157753 ×2
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×2
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 1 spare in the box ×2

Technic Steering, Suspension and Engine 2 pieces

  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×2

Wheels and Tyres 2 pieces

  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2

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.