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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.

Ariel's Magical Underwater Palace

Checking

10435 Ariel's Magical Underwater Palace

116 pieces in 54 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

Duplo, Quatro and Primo 114 pieces

  • Duplo Plant Vine 2 x 3 x 5 1/2 with Leaves and One End Stud Bright Green Part 5056 Element 6467817 ×2
  • Duplo Plant Vine with Leaves and Two End Anti-Studs Bright Green Part 89158 Element 6446331 ×1
  • Duplo Brick 2 x 2 Bright Light Yellow Part 3437 Element 4648231 or 4261816 ×6
  • Duplo Brick 2 x 2 x 1 1/2 with Curved Top Bright Light Yellow Part 11170 Element 6295010 ×2
  • Duplo Brick 2 x 3 with Curved Bottom Bright Light Yellow Part 98252 Element 6296059 ×2
  • Duplo Musical Instrument Guitar Bright Light Yellow Part 65114 Element 6294549 ×1
  • Duplo Plate 2 x 8 Bright Light Yellow Part 44524 Element 6470258 or 4278913 ×1
  • Duplo Plate Round 4 x 8 Semi-Circle Bright Light Yellow Part 29304 Element 6303202 ×3
  • Duplo Brick 1 x 2 x 2 with Bottom Tube Coral Part 76371 Element 6288474 ×2
  • Duplo Brick 2 x 2 Coral Part 3437 Element 6288480 ×3
  • Duplo Brick 2 x 4 Curved Bottom Coral Part 98224 Element 6381661 ×3
  • Duplo Plant, Flower with 1 Top Studs Coral Part 84195 Element 6393151 ×4
  • Duplo Plate 8 x 16 Dark Purple Part 6490 Element 6494413 ×1
  • Duplo Plant / Leaf Lavender Part 3118 Element 6494422 ×2
  • Duplo Plant Bush / Tree Top / Rock Pile with 4 studs Lavender Part 84194 Element 6494415 ×4
  • Duplo Tile 2 x 4 with Cushion Pattern Lavender Part 65110 Element 6343502 ×2
  • Duplo Brick 1 x 2 x 2 with Shell Music Box Print Light Aqua Part 76371pr9909 Element 6480501 ×1
  • Duplo Brick 2 x 10 x 2 Arch Light Aqua Part 51704 Element 6347579 ×1
  • Duplo Brick 2 x 3 with Curved Bottom Light Aqua Part 98252 Element 6294241 ×4
  • Duplo Brick 2 x 4 Light Aqua Part 3011 Element 6294254 ×2
  • Duplo Plate 4 x 6 Light Aqua Part 25549 Element 6494412 ×2
  • Duplo Plate Round 4 x 4 Light Aqua Part 98222 Element 6392988 ×1
  • Duplo Brick 1 x 2 x 2 with Bottom Tube Medium Azure Part 76371 Element 6101124 ×1
  • Duplo Brick 2 x 2 Medium Azure Part 3437 Element 6054619 ×5
  • Duplo Brick 2 x 2 Slope 45° Medium Azure Part 6474 Element 6172514 ×1
  • Duplo Brick 2 x 3 with Curved Bottom Medium Azure Part 98252 Element 6167834 ×4
  • Duplo Brick 2 x 3 with Curved Top Medium Azure Part 2302 Element 6138111 ×2
  • Duplo Brick 2 x 4 Curved Bottom Medium Azure Part 98224 Element 6210726 ×2
  • Duplo Brick Round 2 x 2 x 2 Medium Azure Part 98225 Element 6494410 ×8
  • Duplo Brush Medium Azure Part 24807 Element 6464781 or 6138094 ×1
  • Duplo Playground Slide Curved Right 90°, Rounded Medium Azure Part 79790 Element 6443794 ×1
  • Duplo Swing Medium Azure Part 35086 Element 6215345 ×1
  • Duplo Turntable 4 x 4 Base, Flush Surface Medium Azure Part 92005 Element 6303204 or 6136354 ×1
  • Duplo Building Roof Spire 3 x 3 x 3 with Azure Starfish, Bubbles Print Medium Lavender Part 16375pr0002 Element 6504956 ×4
  • Duplo Flower 4 x 4 x 1 with 4 Top Studs Medium Lavender Part 15515 Element 6474920 ×5
  • Duplo Plant, Flower with 1 Top Studs Medium Lavender Part 84195 Element 6446310 ×3
  • Duplo Brick 1 x 2 x 2 with Side Cutouts and Channel in Top Medium Nougat Part 42234 Element 6535352 or 6431355 ×2
  • Duplo Treasure Chest Opening 2 x 3 x 3 with Detailed Lid Ends Pearl Gold Part 11249 Element 6034352 ×1
  • Duplo Animal, Crab with White Eyes Print (Sebastian) Red Part 5549pr0001 Element 6478720 ×1
  • Duplo Camera Red Part 24806 Element 6464795 or 6259327 ×1
  • Duplo Chair with no Back / Stool Red Part 65273 Element 6287571 ×2
  • Duplo Brick 1 x 2 x 2 with Yellow/Orange Fish Print Trans-Light Blue Part 76371pr9911 Element 6531053 or 6478714 ×1
  • Duplo Brick 2 x 2 with Tiara Print Trans-Yellow Part 3437pr9981 Element 6509616 ×1
  • Duplo Cone / Ice Cup White Part 27383 Element 6210049 ×1
  • Duplo Disk with Fruit Print White Part 27372pr9998 Element 6478716 ×1
  • Duplo Disk with Xylophone Print White Part 27372pr9999 Element 6480499 ×1
  • Duplo Plate 2 x 4 White Part 40666 Element 4250172 or 4160151 ×1
  • Duplo Brick 1 x 2 x 2 with Bottom Tube Yellow Part 76371 Element 6030817 ×6
  • Duplo Brick 1 x 2 x 2 with Mirror Print Yellow Part 76371pr9910 Element 6480500 ×1
  • Duplo Brick 2 x 3 x 2 with Curved Top Yellow Part 11344 Element 6020954 ×2
  • Duplo Brick 2 x 4 x 2 Arch Yellow Part 11198 Element 6213652 ×2
  • Duplo Chair with no Back / Stool Yellow Part 65273 Element 6287579 ×1

Non-Buildable Figures (Duplo, Fabuland, etc) 2 pieces

  • Duplo Figure with Hair Curly Reddish Brown, Lime Mermaid Legs Bright Green Part 109145pr0001 Element 6490031 ×1
  • Duplo Figure with Hair High Red, Light Aqua Shell, Medium Azure Mermaid Legs Magenta Part 108219pr0002 Element 6490064 ×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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