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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.

Medium First Tools for Technology Set

Checking

9103 Medium First Tools for Technology Set

56 pieces in 25 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

Black 18 pieces

  • Duplo Toolo Tool Screwdriver Black Part 74864 Element 4193245 or 4142580 ×2
  • 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 16 pieces

  • Duplo Brick 2 x 2 Red Part 3437 Element 4583321 or 343721 ×2
  • Duplo Brick 2 x 3 with Curved Top Red Part 2302 Element 230271 or 230221 ×2
  • Duplo Brick 2 x 4 Red Part 3011 Element 4583326 or 4290074 ×2
  • Duplo Brick 2 x 4 x 2 Rounded Ends, with Two Rotating Eyes Red Part 4258c01 ×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 2 with Holes and Clip on Bottom Red Part 74957 Element 75071 ×1
  • Duplo Toolo Brick 2 x 5 with 8 Side Screw Sockets, Swivel Bracket End and Clip End Red Part 6288c01 Element 4142372 or 75024 ×2
  • Duplo Toolo Brick with Screw 2 x 2, with Angled Arm with Clip Red Part 6285 Element 4142155 or 4100618 ×4

Blue 13 pieces

  • Duplo Brick 2 x 4 x 2 Rounded Ends Blue Part 4198 Element 644823 ×1
  • Duplo Brick 2 x 6 x 2 with Curved Ends Blue Part 4197 Element 4161148 or 419723 ×1
  • Duplo Toolo Arm 2 x 6 with Triangular Screw at Both Ends Blue Part 6279 Element 4142370 ×1
  • Duplo Toolo Arm 2 x 6 with Triangular Set Screw and Clip Ends Blue Part 74847 Element 4142366 or 74847 ×3
  • Duplo Toolo Brick 2 x 2 with Angled Bracket with Forks and 2 Screws Blue Part 6284c01 Element 74852 ×3
  • Duplo Toolo Brick 2 x 5 with 8 Side Screw Sockets, Swivel Bracket End and Clip End Blue Part 6288c01 Element 74868 ×1
  • Duplo Toolo Brick with Screw 2 x 2, with Angled Arm with Clip Blue Part 6285 Element 74854 ×3

Yellow 9 pieces

  • Duplo Brick 2 x 2 Yellow Part 3437 Element 4583546 or 343724 ×2
  • Duplo Brick 2 x 2 with Eye with White Spot Print, on Two Sides - Type 1 Yellow Part 3437pr0067 Element 82061 ×1
  • Duplo Brick 2 x 3 with Curved Top Yellow Part 2302 Element 230274 or 230224 ×2
  • Duplo Brick 2 x 4 Yellow Part 3011 Element 4290060 or 301124 ×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 Digger Bucket with 3 teeth Yellow Part 6310 Element 631024 ×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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