BlockTalk Find Your Set

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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.

Fish Tank

Checking

31122 Fish Tank

352 pieces in 118 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

Black 107 pieces

  • Bracket 1 x 1 - 1 x 1 Inverted Black Part 36840 Element 6234695 ×5
  • Bracket 1 x 2 - 2 x 2 Black Part 44728 Element 6117973 or 6048855 ×18
  • Brick 1 x 12 Black Part 6112 Element 611226 ×6
  • Brick Arch 1 x 3 x 2 Black Part 88292 Element 4581280 ×1
  • Brick Arch 1 x 3 x 2 Curved Top Black Part 6005 Element 4618880 or 4188168 ×1
  • Brick Curved 3 x 1 No Studs Black Part 50950 Element 4251161 ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×1
  • Brick Sloped Inverted 45° 4 x 1 Double with 1 x 2 Recessed Black Part 32802 Element 6267482 ×2
  • Brick Special 1 x 1 with Studs on 2 Sides Black Part 47905 Element 4214559 ×2
  • Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×1
  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 14 Black Part 91988 Element 6001494 ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Black Part 60478 Element 4515368 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×2
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×2
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 1 spare in the box ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×4
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×8
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×6
  • Tile 2 x 4 with Groove Black Part 87079 Element 4560182 ×14
  • Tile Special Round 1 x 1 with Hollow Bar Black Part 20482 Element 6186675 or 6167933 1 spare in the box ×7
  • Wedge Plate 2 x 2 Left Black Part 24299 Element 6141554 ×1
  • Wedge Plate 2 x 2 Right Black Part 24307 Element 6141556 ×1

Blue 57 pieces

  • Bracket 1 x 2 - 1 x 2 Blue Part 99781 Element 6163471 ×6
  • Bracket 1 x 2 - 2 x 2 Inverted Blue Part 99207 Element 6133720 ×30
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Blue Part 6091 Element 6347945 or 4519981 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Blue Part 54200 Element 4504380 or 4296154 1 spare in the box ×2
  • Plate 1 x 1 Blue Part 3024 Element 302423 1 spare in the box ×4
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×10
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×1
  • Tile Round 1 x 1 Blue Part 98138 Element 6284575 or 6009460 1 spare in the box ×2

Yellow 31 pieces

  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Yellow Part 6091 Element 6388492 or 6361082 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Yellow Part 11477 Element 6029947 ×3
  • Brick Curved Inverted 4 x 1 Yellow Part 13547 Element 6146298 ×1
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Yellow Part 25214 Element 6253294 or 6173898 ×1
  • Brick Round 2 x 2, Pin Holes Yellow Part 17485 Element 6378132 or 6102524 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Yellow Part 54200 Element 4504381 or 4283095 1 spare in the box ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Yellow Part 3040b Element 4121965 or 304024 ×1
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×1
  • Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×2
  • Dish 2 x 2 Inverted [Radar] Yellow Part 4740 Element 4169960 or 4107622 ×1
  • Dish 3 x 3 Inverted [Radar] Yellow Part 43898 Element 6167518 or 4616180 ×1
  • Plant, Flower 2 x 2 - Round [Solid Stud] Yellow Part 98262 Element 6000022 ×1
  • Plate 1 x 1 Yellow Part 3024 Element 302424 1 spare in the box ×4
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×1
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×3
  • Plate Round 1 x 1 with Open Stud Yellow Part 85861 Element 6168644 or 6050850 1 spare in the box ×1
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

White 22 pieces

  • Bracket 1 x 1 - 1 x 1 White Part 36841 Element 6548291 or 6296132 ×3
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×1
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 1 spare in the box ×1
  • Brick Special 1 x 1 with Studs on 2 Sides White Part 47905 Element 6548273 or 4626882 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×2
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×4
  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×10

Dark Bluish Gray 19 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Dark Bluish Gray Part 48729b Element 6278155 or 4579234 1 spare in the box ×2
  • Bracket 1 x 2 - 1 x 2 Dark Bluish Gray Part 99781 Element 6214341 ×8
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×3
  • Brick Special 1 x 1 Studs on 4 Sides Dark Bluish Gray Part 4733 Element 4210700 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Dark Bluish Gray Part 61252 Element 6360111 or 4579354 ×4
  • Plate Special 1 x 2 with End Towball Dark Bluish Gray Part 22890 Element 6370802 or 6338168 ×1

Dark Azure 14 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Dark Azure Part 99780 Element 6152110 ×10
  • Plate 1 x 12 Dark Azure Part 60479 Element 6185543 ×4

Tan 14 pieces

  • Brick Round 1 x 1 Open Stud Tan Part 3062b Element 4117070 or 306205 ×5
  • Brick Round 2 x 2 Dome Top, Hollow Stud Tan Part 30367c Element 6191654 or 4216648 ×1
  • Brick Special 1 x 1 with Studs on 2 Sides Tan Part 47905 Element 4213568 ×2
  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Tan Part 32952 Element 6232135 ×1
  • Plate 2 x 12 Tan Part 2445 Element 6093864 or 4526771 ×1
  • Plate 6 x 12 Tan Part 3028 Element 6185313 or 6097342 ×4

Orange 12 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Orange Part 54200 Element 4504371 or 4248195 1 spare in the box ×5
  • Brick Special 1 x 1 with Headlight Orange Part 4070 Element 4521571 or 4212455 ×1
  • Brick Special 1 x 2 with Studs on 2 Sides Orange Part 52107 Element 6345590 ×2
  • Plate 1 x 2 Orange Part 3023 Element 4177932 or 4163009 ×1
  • Plate Round 4 x 4 with Pin Hole Orange Part 60474 Element 6226926 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Orange Part 15573 Element 6092599 ×2

Medium Azure 10 pieces

  • Plate 1 x 2 Medium Azure Part 3023 Element 6603337 or 6097419 ×10

Trans-Clear 10 pieces

  • Antenna 1 x 4 with Flat Top Trans-Clear Part 3957b Element 6514014 or 6166111 ×3
  • Brick Round 1 x 1 Open Stud Trans-Clear Part 3062b Element 6514232 or 6223655 ×5
  • Brick Round 2 x 2 Dome Top, Hollow Stud Trans-Clear Part 30367c Element 6507967 or 6264987 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×1

Red 8 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Red Part 99780 Element 6089698 ×6
  • Dish 2 x 2 Inverted [Radar] Red Part 4740 Element 4585146 or 4279383 ×1
  • Plate Round 4 x 4 with Pin Hole Red Part 60474 Element 4515348 ×1

Light Bluish Gray 6 pieces

  • Bracket 1 x 2 - 1 x 4 [Rounded Corners at Bottom, Square Corners at Top] Light Bluish Gray Part 28802 Element 6168615 ×2
  • Brick Special 1 x 2 Palisade [aka Log] Light Bluish Gray Part 30136 Element 4550325 or 4519968 ×1
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Light Bluish Gray Part 88072 Element 6261353 or 4611702 ×1
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×1

Dark Pink 5 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Pink Part 11477 Element 6132918 ×1
  • Brick Round 2 x 2 Truncated Cone Dark Pink Part 98100 Element 6329278 ×1
  • Brick Special 1 x 1 with Studs on 2 Sides Dark Pink Part 47905 Element 6334462 ×2
  • Cone 3 x 3 x 2 Dark Pink Part 6233 Element 6310205 ×1

Green 5 pieces

  • Plant, Flower Stem with Bar and 6 Stems Green Part 19119 Element 6269940 or 6097232 ×5

Light Aqua 5 pieces

  • Brick Sloped 65° 2 x 1 x 2 Light Aqua Part 60481 Element 6163294 or 6070656 ×5

Bright Pink 4 pieces

  • Brick Curved Inverted 2 x 1 Bright Pink Part 24201 Element 6296041 ×1
  • Plant, Leaves 4 x 3 Bright Pink Part 2423 Element 6329957 ×2
  • Tile Round 2 x 2 with Bottom Stud Holder Bright Pink Part 14769 Element 6092768 ×1

Bright Light Orange 3 pieces

  • Plant, Carrot Top Bright Light Orange Part 33183 Element 6096682 1 spare in the box ×3

Magenta 3 pieces

  • Brick Round 3 x 3 Dome with Center Stud Magenta Part 49308 Element 6290543 ×1
  • Dish 3 x 3 Inverted [Radar] Magenta Part 43898 Element 6217587 ×1
  • Plate 1 x 2 Magenta Part 3023 Element 6103415 or 6020605 ×1

Trans-Light Blue 3 pieces

  • Plate Round 1 x 1 with Open Stud Trans-Light Blue Part 85861 Element 6510163 or 6283590 1 spare in the box ×3

Bright Green 2 pieces

  • Plant, Sea Grass Bright Green Part 30093 Element 6269992 or 6210746 ×2

Dark Blue 2 pieces

  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Dark Blue Part 18674 Element 6253885 ×2

Dark Turquoise 2 pieces

  • Brick Round 2 x 2 Truncated Cone Dark Turquoise Part 98100 Element 6278463 ×1
  • Cone 4 x 4 x 2, Axle Hole [Plain] Dark Turquoise Part 3943b Element 6210594 ×1

Trans-Dark Pink 2 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Dark Pink Part 54200 Element 6245287 or 6172367 1 spare in the box ×2

Bright Light Yellow 1 piece

  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Bright Light Yellow Part 32828 Element 6296963 1 spare in the box ×1

Coral 1 piece

  • Plate 1 x 1 Coral Part 3024 Element 6258091 1 spare in the box ×1

Dark Tan 1 piece

  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Dark Tan Part 18674 Element 6132767 ×1

Lavender 1 piece

  • Plant, Leaves 6 x 5 Lavender Part 2417 Element 6097450 ×1

Lime 1 piece

  • Brick Special 1 x 1 Studs on 4 Sides Lime Part 4733 Element 6174006 or 4212458 ×1

Trans-Red 1 piece

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Red Part 30153 Element 6513969 or 6247785 1 spare in the box ×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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