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LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Unikitty Fun Pack

Checking

71231 Unikitty Fun Pack

44 pieces in 28 part and color combinations, plus 1 minifigure.

LEGO counts 57 pieces. This inventory comes from a separate parts catalog and lists 58, including the 14 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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 Round Curved and Dishes 16 pieces

  • Plate Round 1 x 1 with Solid Stud Bright Pink Part 6141 Element 4517996 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Dark Purple Part 6141 Element 4566522 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Medium Azure Part 6141 Element 6102986 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Orange Part 6141 Element 4157103 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×4
  • Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 1 spare in the box ×1

Plates Special 8 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Magenta Part 15573 Element 6101073 ×1
  • Bracket 1 x 2 - 1 x 2 Inverted White Part 99780 Element 6548278 or 6070698 ×1
  • Plate Special 1 x 2 with Pin Hole on Top White Part 11458 Element 6632146 or 6057414 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] White Part 99206 Element 6046979 ×1
  • Plate Special 3 x 2 with Rounded End, Hole White Part 3176 Element 6609537 or 6089696 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Yellow Part 3176 Element 4188313 or 4141738 ×1

Bricks Curved 5 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×4
  • Brick Curved 4 x 1 Double, No Studs White Part 93273 Element 6552143 or 6023806 ×1

Plants & Trees 4 pieces

  • Plant, Flower - Small Dark Pink Part 3742 2 spares in the box ×2
  • Plant, Flower 2 x 2 - Round [Solid Stud] Yellow Part 98262 Element 6000022 ×2

Plates 3 pieces

  • Plate 1 x 4 Lime Part 3710 Element 4187743 or 4122441 ×1
  • Plate 2 x 3 Medium Azure Part 3021 Element 6604733 or 6013828 ×1
  • Plate 2 x 4 Medium Azure Part 3020 Element 6603317 or 6013826 ×1

Bricks Sloped 2 pieces

  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed White Part 4871 Element 4173943 or 487101 ×2

Electronics 2 pieces

  • Function Brick Round 4 x 4 x 2/3 with 2 Studs and Pastel Rainbow and Clouds Print Trans-Light Blue Part 19981pr0027 Element 6122887 ×1
  • Function Brick Round 4 x 4 x 2/3 with 4 Studs (Generic for Gadgets) Trans-Light Blue Part 18868c00 Element 6104392 ×1

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×2

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 with Axle Hole Trans-Light Blue Part 3941 Element 6514282 or 6273153 ×1

Transportation - Land 1 piece

  • Steering Stand 1 x 2 with Black Steering Wheel White Part 3829c01 Element 4208543 or 9551 ×1

Minifigures 1 figure

  • Unikitty, Light Aqua Foot, Closed Mouth, Round Eyes (Dimensions) 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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