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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.

Supplementary Set

Checking

9123 Supplementary Set

56 pieces in 22 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.

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Piece checklist

Blue 24 pieces

  • Duplo Toolo Arm 2 x 10 with Angled Arm, with End Clip Blue Part 6281c01 Element 4142364 ×2
  • Duplo Toolo Arm 2 x 11 with Triangular Set Screw End Blue Part 74844 Element 4142363 or 74844 ×4
  • Duplo Toolo Arm 2 x 12 with Triangular Set Screw at Both Ends and in the Middle Blue Part 6666c01 Element 4142373 ×4
  • Duplo Toolo Arm 2 x 6 with Triangular Screw at Both Ends Blue Part 6279 Element 4142370 ×6
  • Duplo Toolo Arm 2 x 6 with Triangular Set Screw and Clip Ends Blue Part 74847 Element 4142366 or 74847 ×6
  • Duplo Toolo Brick 2 x 8 with 10 Side Screw Sockets, Swivel Bracket End and Clip End Blue Part 74867 Element 4142371 ×1
  • Duplo Toolo Brick 2 x 8 with 2 Screws in Holes 2 and 6 Blue Part 31036c02 Element 4142116 ×1

Black 17 pieces

  • Duplo Hose with Yellow Nozzle and Stud Holder Black Part 6425c03 Element 642530 ×1
  • Duplo Toolo Tyre / Tire Black Part 6292 Element 6064175 or 4514411 ×8
  • Duplo Toolo Wheel with Connector Pin Black Part 6290 Element 4142501 or 4120376 ×8

Red 8 pieces

  • Duplo Brick 2 x 2 Slope 45° with Medical Console Diagnostic or Locator Print Red Part 6474pr9993 Element 4284193 or 82293 ×1
  • Duplo Toolo Arm Turning with Clip End Red Part 6663c01 Element 4100690 ×1
  • Duplo Toolo Arm Turning with Set Screw End Red Part 6662c01 Element 4142378 or 4100689 ×1
  • Duplo Toolo Brick 2 x 2 with Angled Bracket with Forks and 2 Screws Red Part 6284c01 Element 4142374 or 4100619 ×2
  • Duplo Toolo Brick 2 x 5 with 8 Side Screw Sockets, Swivel Bracket End and Clip End Red Part 6288c01 Element 4142372 or 75024 ×1
  • Duplo Toolo Brick with Screw 2 x 2, with Angled Arm with Clip Red Part 6285 Element 4142155 or 4100618 ×2

Yellow 6 pieces

  • Duplo Hose 11L with Stud Holder and Black Hose Yellow Part 6426c01 Element 642630 ×1
  • Duplo Toolo Arm with Fake Pulley and Hook Yellow Part 6295 Element 629524 ×1
  • Duplo Toolo Brick 2 x 2 with Holes and Clip on Bottom Yellow Part 74957 Element 74957 ×1
  • Duplo Toolo Cabin Bottom Yellow Part 6293 Element 4100622 or 629324 ×1
  • Duplo Toolo Hydro Nozzle Yellow Part 6363 Element 636324 ×2

Trans-Light Blue 1 piece

  • Duplo Toolo Windscreen Trans-Light Blue Part 6672 Element 667242 ×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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