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.

Gear Bots

Checking

5006823 Gear Bots

62 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

Light Bluish Gray 15 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×6
  • Technic Plate 2 x 4 [3 Holes] Light Bluish Gray Part 3709 Element 4211444 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Bluish Gray Part 4185 Element 6321743 or 4494222 ×7

Red 14 pieces

  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×2
  • Technic Axle 8 Red Part 3707 Element 6130004 ×3
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×3
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×6

Black 12 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×3
  • Technic Axle 6 Black Part 3706 Element 370626 ×1
  • Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Black Part 33299b Element 4563044 ×4
  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×4

Yellow 11 pieces

  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×1
  • Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×3
  • Technic Pin Connector Round [Slotted] Yellow Part 62462 Element 6173122 or 4526983 ×1

Blue 10 pieces

  • Plate 2 x 2 Corner Blue Part 2420 Element 242073 or 242023 ×4
  • Technic Beam 1 x 3 Thin Blue Part 6632 Element 6344176 or 4107829 ×4
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×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.