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.

Battery Wagon with Signal and Direction - Changing

Checking

161 Battery Wagon with Signal and Direction - Changing

8 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

Red 5 pieces

  • Battery Box, Train Car with Black Base, Red Wheels and Magnets Red Part 3443c02 ×1
  • Train Direction Switch - 4.5V 2 x 3 Red Part 3218 ×2
  • Train Signal Circuit-Breaker Bar Red Part upn0387 ×1
  • Train Signal Post Red Part upn0262 ×1

Blue 1 piece

  • Battery Cover, Train Car Roof 6 x 14 Blue Part 699 ×1

White 1 piece

  • Wire with 2-Prong Connectors, 12V / 4.5V 11L White Part upn0257c11 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Sets 161-1, 694-1 [No Color/Any Color] Part 003440 ×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.