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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.

Rocket

Checking

40103 Rocket

48 pieces in 24 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

Plates Round Curved and Dishes 7 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×3
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×3

Bricks Sloped 6 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Brown Part 54200 Element 6245263 or 4244368 1 spare in the box ×6

Bricks Round and Cones 5 pieces

  • Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×4
  • Cone 2 x 2 x 2, Open Stud White Part 3942c Element 6044601 or 6022158 ×1

Bricks Special 5 pieces

  • Brick Special 1 x 1 Studs on 4 Sides Dark Bluish Gray Part 4733 Element 4210700 ×3
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×2

Plates 5 pieces

  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×2
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×1
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×1

Tiles 4 pieces

  • Tile 1 x 3 Light Bluish Gray Part 63864 Element 4558169 ×4

Plates Special 3 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Black Part 87580 Element 6663108 or 4565323 ×1

Technic Axles 3 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×3

Technic Special 3 pieces

  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Red Part 41669 Element 4185661 ×3

Bars, Ladders and Fences 1 piece

  • Antenna 1 x 4 with Flat Top White Part 3957b Element 6550147 or 395701 ×1

Bricks Curved 1 piece

  • Brick Arch 1 x 4 White Part 3659 Element 6550145 or 365901 ×1

Pneumatics 1 piece

  • Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 1 spare in the box ×1

Supports, Girders and Cranes 1 piece

  • Support 2 x 4 x 5 Stanchion Inclined [5mm wide posts] White Part 4476b Element 4142125 or 447601 ×1

Technic Connectors 1 piece

  • Technic Axle and Pin Connector Angled Triple [120° Offset] Dark Brown Part 10288 Element 6273219 or 6005755 ×1

Technic Pins 1 piece

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Bluish Gray Part 4150pr0022 Element 4221881 ×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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