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.

Submarine

Checking

40137 Submarine

28 pieces in 11 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 10 pieces

  • Brick Round 2 x 2 Dome Top, Hollow Stud Light Bluish Gray Part 30367c Element 4211637 ×2
  • Brick Round 2 x 2, Pin Holes Light Bluish Gray Part 17485 Element 6372076 or 6078985 ×4
  • Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Light Bluish Gray Part 6222 Element 4211527 ×2
  • Plate Special 1 x 2 5.9mm Centre Side Towball Socket Light Bluish Gray Part 14704 Element 6414561 or 6338165 ×2

Black 6 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×2

Red 5 pieces

  • Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×4
  • Brick Round 4 x 4 Centre Hole Red Part 87081 Element 4610843 ×1

Trans-Yellow 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×4

Dark Bluish Gray 2 pieces

  • Plate Special 1 x 2 with 5.9mm Towball Socket and Towball Dark Bluish Gray Part 14419 Element 6414554 or 6338166 ×2

Trans-Brown 1 piece

  • Dome Hemisphere 4 x 4 Trans-Brown Part 86500 Element 6252259 or 6079676 ×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.