BlockTalk Find Your Set

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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.

Mobile Crane (Train Base)

Checking

128-2 Mobile Crane (Train Base)

23 pieces in 16 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

Plates 9 pieces

  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate 2 x 8 Red Part 3034 Element 303421 ×1
  • Plate 4 x 6 Red Part 3032 Element 303221 ×2

Bricks 6 pieces

  • Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 ×2
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×1
  • Brick 2 x 4 without Cross Supports Yellow Part 3001a ×1

Hinges, Arms and Turntables 3 pieces

  • Hinge Plate 2 x 9 with Hole Close to Hinge [Complete Assembly] Red Part 3324ac01 ×2
  • Turntable 4 x 4 - Old Type Complete - Faceted Red Part 3404ac01 ×1

String, Bands and Reels 2 pieces

  • String Cord Medium Thickness 50cm Black Part 7916c50 ×1
  • String Reel Winch 4 x 4 x 2 with Metal Handle, Red Drum Yellow Part 586c01 ×1

Magnets and Holders 1 piece

  • Train Base 6 x 16 Type I with Wheels and Red and Blue Magnets Black Part 736c02 ×1

Plates Special 1 piece

  • Plate Special 3 x 2 with Rounded End, Hole Red Part 3176 Element 4188189 or 317621 ×1

Supports, Girders and Cranes 1 piece

  • Hook, Plate 1 x 2 with Crane Hook Right Red Part 3127b ×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.

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