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.

Pinions, Connectors, and Axles

Checking

1345 Pinions, Connectors, and Axles

52 pieces in 7 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 Axles 26 pieces

  • Technic Axle 2 Black Part 3704 Element 370426 ×6
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×6
  • Technic Axle 4 Threaded Black Part 3705b ×4
  • Technic Axle Nut Light Gray Part 4698 ×10

Technic Pins 22 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×10
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×12

Technic Steering, Suspension and Engine 4 pieces

  • Technic Steering Arm Light Gray Part 4261 Element 4225506 or 4189316 ×4

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.