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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.

Solomon R. Guggenheim Museum

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21004 Solomon R. Guggenheim Museum

208 pieces in 59 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

Bricks 78 pieces

  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×8
  • Brick 1 x 2 Tan Part 3004 Element 4109995 or 300405 ×54
  • Brick 2 x 8 Tan Part 3007 Element 6037398 or 4141533 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×4
  • Brick 1 x 3 White Part 3622 Element 6550143 or 362201 ×1
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×1
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×3
  • Brick 1 x 8 White Part 3008 Element 6550134 or 300801 ×2
  • Brick 2 x 2 Corner White Part 2357 Element 6552088 or 6548253 ×2
  • Brick 2 x 3 White Part 3002 Element 6550133 or 300251 ×1
  • Brick 2 x 6 White Part 2456 Element 6552122 or 4249698 ×1

Plates 44 pieces

  • Plate 2 x 10 Black Part 3832 Element 383226 ×1
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×4
  • Plate 1 x 10 Tan Part 4477 Element 4143409 or 447705 ×9
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×1
  • Plate 1 x 4 Tan Part 3710 Element 4113233 or 371005 ×1
  • Plate 1 x 8 Tan Part 3460 Element 4114324 or 346005 ×3
  • Plate 2 x 3 Tan Part 3021 Element 4118790 or 302105 ×2
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×3
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×1
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×1
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×1
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×2
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×4
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×2
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 4 x 6 White Part 3032 Element 303201 ×1
  • Plate 4 x 8 White Part 3035 Element 6609533 or 303501 ×1

Tiles 40 pieces

  • Tile 1 x 6 with "Museum" Print Black Part 6636pr0003 Element 4561431 ×1
  • Tile 1 x 6 with "R. Guggenheim" Print Black Part 6636pr0002 Element 4561430 ×1
  • Tile 1 x 6 with "Solomon" Print Black Part 6636pr0001 Element 4561429 ×1
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×3
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×2
  • Tile 1 x 2 with Groove Tan Part 3069b Element 4114026 ×10
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×3
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×3
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×2
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×2
  • Tile 1 x 8 with Groove White Part 4162 Element 6552110 or 416201 ×2
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×10

Plates Round Curved and Dishes 26 pieces

  • Plate Round 1 x 1 with Solid Stud Tan Part 6141 Element 4161734 or 614105 1 spare in the box ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Tan Part 4032a Element 4140562 or 403205 ×3
  • Dish 3 x 3 Inverted [Radar] White Part 43898 Element 4179580 ×1
  • Dish 4 x 4 Inverted [Radar] White Part 3960 Element 396001 ×1
  • Dish 6 x 6 Inverted (Radar) with Hollow Studs White Part 44375a Element 4182773 ×6
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×4
  • Plate Round 4 x 4 with Pin Hole White Part 60474 Element 6564904 or 4515347 ×5
  • Plate Round Corner 3 x 3 White Part 30357 Element 6550165 or 4550745 ×5

Plates Special 10 pieces

  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) White Part 3794b ×9
  • Plate Special 4 x 4, Studs on One Edge Plain] White Part 6179 Element 6550149 or 617901 ×1

Bricks Round and Cones 8 pieces

  • Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×2
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch White Part 3063b Element 4501579 or 306301 ×5
  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs White Part 48092 Element 6550183 or 6337627 ×1

Technic Axles 1 piece

  • Technic Axle 6 Black Part 3706 Element 370626 ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Bottom Cross White Part 4150 Element 415051 or 415001 ×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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