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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.

Unikitty Roller Coaster Wagon

Checking

30406 Unikitty Roller Coaster Wagon

32 pieces in 17 part and color combinations, plus 1 minifigure.

The official piece count includes the 14 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.

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 Special 6 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×6

Bricks Sloped 5 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Pink Part 54200 Element 6127601 or 6057894 1 spare in the box ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Lime Part 85984 Element 6025026 ×1
  • Brick Sloped 33° 3 x 1 Medium Azure Part 4286 Element 6097317 ×2

Plates 3 pieces

  • Plate 1 x 2 Dark Pink Part 3023 Element 6057387 or 4245302 ×1
  • Plate 4 x 4 Lavender Part 3031 Element 6213252 ×2

Tiles Round and Curved 3 pieces

  • Tile Round 2 x 2 with Bottom Stud Holder Dark Pink Part 14769 Element 6174946 ×3

Bricks Special 2 pieces

  • Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×2

Plates Wedged 2 pieces

  • Wedge Plate 4 x 2 Left Blue Part 41770 Element 6430083 or 4161330 ×1
  • Wedge Plate 4 x 2 Right Blue Part 41769 Element 6430076 or 4160867 ×1

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Blue Part 3700 Element 370023 ×2

Tiles Special 2 pieces

  • Tile, Star with Stud Holder, Pin Hole Bright Light Orange Part 11609 Element 6432033 or 6167776 1 spare in the box ×2

Transportation - Land 2 pieces

  • Wheel Holder, Plate, Round 2 x 2 Thin with Clips Light Bluish Gray Part 2655 Element 6152344 or 4211373 ×2

Wheels and Tyres 2 pieces

  • Wheel Skateboard / Trolley Dark Purple Part 2496 Element 6061692 ×2

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 Truncated Cone White Part 98100 Element 6609536 or 4649167 ×1

Projectiles / Launchers 1 piece

  • Launcher, Brick Special 1 x 4 with Inside Clips (Disk Shooter) with Recessed Center 2 Studs Light Bluish Gray Part 16968 Element 6096150 ×1

Technic Axles 1 piece

  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×1

Minifigures 1 figure

  • Unikitty, Dark Azure Foot, Closed Mouth Minifigure, checked as a whole figure ×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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