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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.

The Mushroom Island

Checking

21129 The Mushroom Island

240 pieces in 60 part and color combinations, plus 2 minifigures.

The official piece count includes the 7 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 82 pieces

  • Plate 6 x 6 Blue Part 3958 Element 4199519 or 395823 ×12
  • Plate 1 x 2 Bright Pink Part 3023 Element 4654128 or 4245303 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×4
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×4
  • Plate 2 x 8 Dark Bluish Gray Part 3034 Element 4210997 ×11
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×7
  • Plate 1 x 2 Red Part 3023 Element 302321 ×8
  • Plate 1 x 4 Red Part 3710 Element 371021 ×4
  • Plate 2 x 4 Red Part 3020 Element 302021 ×1
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×4
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×2
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×17
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1

Bricks 63 pieces

  • Brick 2 x 4 Dark Tan Part 3001 Element 4497066 or 4247145 Also in Tan ×6
  • Brick 1 x 1 Medium Nougat Part 3005 Element 6057986 or 4569624 ×4
  • Brick 1 x 2 Medium Nougat Part 3004 Element 4569382 ×2
  • Brick 1 x 2 with Reddish Brown and Dark Brown Lines Print Medium Nougat Part 3004pr0014 Element 6097024 ×2
  • Brick 2 x 2 Medium Nougat Part 3003 Element 6058085 or 4645062 ×7
  • Brick 2 x 4 Red Part 3001 Element 300121 ×10
  • Brick 2 x 2 Reddish Brown Part 3003 Element 4211210 ×1
  • Brick 2 x 4 Reddish Brown Part 3001 Element 4211201 ×12
  • Brick 2 x 6 Reddish Brown Part 2456 Element 4286200 or 4216615 ×13
  • Brick 2 x 4 Tan Part 3001 Element 4114319 or 300105 Also in Dark Tan ×1
  • Brick 2 x 2 without Inside Ridges Trans-Dark Blue Part 6223 Element 6514091 or 6238043 ×1
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×1
  • Brick 2 x 2 x 3 White Part 30145 Element 4109791 ×3

Plates Special 34 pieces

  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 ×14
  • Plate Special 1 x 2 with Door Rail Dark Tan Part 32028 Element 4616711 or 4267875 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Tan Part 87580 Element 6126075 or 4578032 ×4
  • Plate Special 2 x 4 with 2 Pin Holes Light Bluish Gray Part 26599 Element 6176242 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Medium Nougat Part 87580 Element 6102994 ×6
  • Bracket 1 x 2 - 1 x 2 Inverted Reddish Brown Part 99780 Element 6174856 ×4
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Reddish Brown Part 60478 Element 6102975 ×1

Plates Round Curved and Dishes 16 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Dark Blue Part 2654 Element 6581774 or 6171732 ×2
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box ×6
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×6

Bricks Special 14 pieces

  • Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×4
  • Brick Special 1 x 1 with Clip Vertical [Open O Clip, Hollow Stud] Medium Nougat Part 60475b Element 6360035 or 4569385 ×1
  • Brick Special 1 x 1 with Handle Medium Nougat Part 2921 Element 6170572 or 6102959 ×1
  • Brick Special 1 x 2 with Groove White Part 4216 Element 6619288 or 4264360 ×4
  • Brick Special 1 x 4 with 4 Studs on One Side White Part 30414 Element 6550167 or 4143254 ×4

Plants & Trees 10 pieces

  • Plant, Carrot Top Bright Green Part 33183 Element 4119479 1 spare in the box ×1
  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Bright Green Part 33291 Element 6170300 or 4619599 1 spare in the box ×4
  • Plant, Carrot Top Bright Light Orange Part 33183 Element 6096682 1 spare in the box ×1
  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Reddish Brown Part 33291 Element 6170302 or 4623429 1 spare in the box ×4

Tiles 9 pieces

  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1
  • Tile 1 x 2 with Groove Medium Nougat Part 3069b Element 6021997 ×2
  • Tile 1 x 4 with Groove Medium Nougat Part 2431 Element 6102998 or 4657956 ×1
  • Tile 2 x 2 with Dark Brown Minecraft Grid Print (Crafting Table) Medium Nougat Part 3068bpr0236 Element 6097003 ×1
  • Tile 1 x 4 with Groove Reddish Brown Part 2431 Element 4211194 ×4

Bricks Round and Cones 4 pieces

  • Brick Round 1 x 1 Open Stud Lime Part 3062b Element 4212454 ×4

Minifig Heads 2 pieces

  • Minifig Head Special, Cube with Rear Ledge, Pixelated Light and 1 Dark Bluish Gray and Black Face Print (Mooshroom) Red Part 19727pr0003 Element 6162537 ×2

Technic Bricks 2 pieces

  • Technic Brick 1 x 4 [3 Pin Holes] Reddish Brown Part 3701 Element 4267994 ×2

Technic Pins 2 pieces

  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×2

Minifig Shields, Weapons, & Tools 1 piece

  • Tool Pickaxe Blocky, Double Medium Azure Part 18789 Element 6093629 ×1

Tiles Round and Curved 1 piece

  • Tile Round 1 x 1 with Pixelated Red and White on Black Background Minecraft Compass Print Flat Silver Part 98138pr0071 Element 6322932 or 6177548 1 spare in the box ×1

Minifigures 2 figures

  • Creeper Minifigure, checked as a whole figure ×1
  • Alex 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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