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.

Watch System Cyclone - Master

Checking

9910 Watch System Cyclone - Master

42 pieces in 12 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

Pen & Watch 42 pieces

  • Watch, Clasp, Band Attachment, Embossed LEGO Logo and 'WATCH SYSTEM' Black Part upn0126 ×1
  • Watch, Clasp, Female Black Part upn0182 ×1
  • Watch, Link Black Part upn0389 ×18
  • Watch, Link Attachment Clip Black Part upn0295 ×2
  • Watch, Link, Wide Black Part upn0062 ×2
  • Watch, Bezel Round, Smooth, Thin [Plain] Light Gray Part upn0179 ×1
  • Watch, Link Light Gray Part upn0389 ×6
  • Watch, Band, Female, Studs and 'WATCH SYSTEM' Neon Green Part upn0318 ×1
  • Watch, Band, Male Neon Green Part upn0317 ×1
  • Watch, Link Neon Green Part upn0389 ×4
  • Watch, Link Neon Orange Part upn0389 ×4
  • Watch, Bezel Round, Smooth, Thick with Minute Ring Print Trans-Clear Part upn0213pr0001 ×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.