BlockTalk Find Your Set

Free tool

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.

Underwater Loop

Checking

41337 Underwater Loop

379 pieces in 156 part and color combinations, plus 2 minifigures.

The official piece count includes the 10 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.

Show

Piece checklist

White 91 pieces

  • Animal Body Part, Clam / Scallop Half Shell with 4 Studs White Part 18970 Element 6550156 or 6097097 ×2
  • Bar 6L with Stop Ring White Part 63965 Element 6170419 or 6081986 ×1
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×4
  • Brick 2 x 3 White Part 3002 Element 6550133 or 300251 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×5
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×1
  • Brick Round 2 x 2 [Grill] White Part 92947 Element 6615536 or 4650644 ×8
  • Brick Sloped 33° 2 x 2 Double White Part 3300 Element 4578606 or 330001 ×1
  • Brick Sloped 33° 3 x 2 White Part 3298 Element 329801 ×4
  • Brick Special 1 x 1 with Clip Vertical [Open O Clip, Hollow Stud] White Part 60475b Element 6321349 or 4533763 ×2
  • Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×3
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×5
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×1
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×1
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×1
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×1
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box ×2
  • Plate Round 4 x 4 with Pin Hole White Part 60474 Element 6564904 or 4515347 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] White Part 61252 Element 6347293 or 4538353 ×6
  • Plate Special 1 x 2 Rounded with 2 Open Studs White Part 35480 Element 6552167 or 6550175 ×2
  • Plate Special 1 x 2 with Angled Handles on Side White Part 92692 Element 4622937 ×2
  • Plate Special 1 x 2 with Pin Hole on Top White Part 11458 Element 6632146 or 6057414 ×2
  • Road Sign Clip-on 2 x 2 Round White Part 30261 Element 6317571 or 4116816 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] White Part 59443 Element 6212049 ×4
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole White Part 60483 Element 6265135 or 6177268 ×2
  • Tile 1 x 2 with 'TICKET' and '0937' Print White Part 3069bpr0198 Element 6192534 ×1
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×2
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×2
  • Tile 4 x 4 Curved, Macaroni White Part 27507 Element 6550142 or 6457244 ×2
  • Tile Round 1 x 1 Quarter White Part 25269 Element 6548285 or 6172366 1 spare in the box ×4
  • Tile Round 1 x 1 with Black Eye with Off-Side Pupil Partially Closed Print White Part 98138pr0027 Element 6284605 or 6099548 1 spare in the box ×2
  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 1 spare in the box ×4
  • Tile Round 2 x 2 with Black Spiral Print White Part 14769pr0080 Element 6215018 ×1
  • Tile Special Round 1 x 1 with Hollow Bar White Part 20482 Element 6186681 or 6178492 1 spare in the box ×1
  • Turntable 2 x 2 Plate, Base White Part 3680 Element 368001 ×1
  • Window 1 x 4 x 3 without Shutter Tabs White Part 60594 Element 4530590 or 4520702 ×1

Light Bluish Gray 30 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Light Bluish Gray Part 48729b Element 6278156 or 4542590 1 spare in the box ×1
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×1
  • Plate Special 1 x 2 with Handles on Ends Light Bluish Gray Part 18649 Element 6093058 ×1
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Light Bluish Gray Part 10247 Element 6045988 ×8
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×4
  • Technic Beam 3 x 3 T-Shape Thick Light Bluish Gray Part 60484 Element 4552348 or 4535772 ×4
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×4
  • Technic Pin Connector Round 1L [Beam] Light Bluish Gray Part 18654 Element 6183784 1 spare in the box ×4
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1

Medium Azure 29 pieces

  • Panel 1 x 2 x 1 with Rounded Corners and 2 Sides Medium Azure Part 23969 Element 6248486 or 6131878 ×1
  • Panel 1 x 2 x 1 with Rounded Corners and Central Divider Medium Azure Part 93095 Element 6671193 or 6133911 ×6
  • Plate 1 x 4 Medium Azure Part 3710 Element 6603965 or 6070757 ×2
  • Plate 2 x 6 Medium Azure Part 3795 Element 6603340 or 6146926 ×2
  • Plate 4 x 8 Medium Azure Part 3035 Element 6104130 ×1
  • Plate 8 x 16 Medium Azure Part 92438 Element 6022010 ×1
  • Plate Round Corner 4 x 4 Medium Azure Part 30565 Element 6481835 or 6056271 ×4
  • Technic Beam 1 x 15 Thick Medium Azure Part 32278 Element 6278944 ×2
  • Tile 1 x 6 with Groove Medium Azure Part 6636 Element 6603342 or 6185309 ×2
  • Tile 2 x 2 with Groove Medium Azure Part 3068b Element 6060857 ×6
  • Tile 2 x 4 with Groove Medium Azure Part 87079 Element 6097042 ×2

Dark Purple 27 pieces

  • Brick 1 x 2 Dark Purple Part 3004 Element 6104154 or 4640739 ×1
  • Brick Round 1 x 1 Open Stud Dark Purple Part 3062b Element 6070305 ×8
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Dark Purple Part 85080 Element 6210472 ×4
  • Plate 1 x 2 Dark Purple Part 3023 Element 4655695 or 4589622 ×2
  • Plate 2 x 2 Dark Purple Part 3022 Element 6047422 or 4224861 ×1
  • Plate 2 x 4 Dark Purple Part 3020 Element 6030277 or 4589625 ×1
  • Plate Round 1 x 1 with Solid Stud Dark Purple Part 6141 Element 4566522 1 spare in the box ×4
  • Plate Round Corner 3 x 3 Dark Purple Part 30357 Element 6251900 or 6172776 ×2
  • Support 1 x 6 x 10 Girder Triangular Dark Purple Part 64449 Element 6278941 ×2
  • Tile 2 x 2 Curved, Macaroni Dark Purple Part 27925 Element 6199899 ×2

Red 26 pieces

  • Brick Curved 3 x 1 No Studs Red Part 50950 Element 4251162 ×6
  • Brick Curved Inverted 2 x 1 Red Part 24201 Element 6186398 ×2
  • Brick Round 2 x 2 [Grill] Red Part 92947 Element 4650646 or 4612108 ×1
  • Brick Special 1 x 4 with 4 Studs on One Side Red Part 30414 Element 4177991 or 4157223 ×1
  • Brick Wedged, Curved 4 x 4 No Top Studs Red Part 47753 Element 6074878 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×1
  • Plate 1 x 3 Red Part 3623 Element 362321 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Red Part 60897 Element 6337002 or 4588003 ×1
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Red Part 99206 Element 6061711 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×7
  • Technic Ball Joint Red Part 32474 Element 4290714 or 4178640 ×1

Bright Green 25 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Bright Green Part 24866 Element 6526150 or 6206150 1 spare in the box ×21
  • Plant, Plate 1 x 1 Round with 3 Leaves Bright Green Part 32607 Element 6182261 ×4

Lime 23 pieces

  • Brick 1 x 2 Lime Part 3004 Element 4613965 or 4164022 ×1
  • Brick 1 x 6 Lime Part 3009 Element 4537919 or 4271446 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Lime Part 11477 Element 6069006 ×4
  • Brick Curved 2 x 2, Two Top Studs Lime Part 30165 Element 6250319 or 6133546 ×1
  • Brick Curved Inverted 2 x 1 Lime Part 24201 Element 6210413 ×2
  • Brick Special 1 x 1 with Stud on 1 Side Lime Part 87087 Element 6073026 or 4566860 ×7
  • Plate 1 x 6 Lime Part 3666 Element 4534665 or 4529160 ×2
  • Plate 2 x 3 Lime Part 3021 Element 6013793 or 6013579 ×1
  • Plate 2 x 6 Lime Part 3795 Element 4621548 or 4563344 ×1
  • Plate 4 x 6 Lime Part 3032 Element 6060848 or 4291524 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Lime Part 15573 Element 6092592 ×1
  • Tile Round 1 x 1 Lime Part 98138 Element 6284583 or 6057878 1 spare in the box ×1

Black 21 pieces

  • Bracket 1 x 2 - 1 x 2 Black Part 99781 Element 6016172 ×2
  • Brick Curved Inverted 2 x 2 x 2/3 Black Part 32803 Element 6211476 ×1
  • Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×1
  • Brick Special 1 x 1 with Studs on 2 Adjacent Sides Black Part 26604 Element 6187572 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side Black Part 30414 Element 4162443 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×11

Orange 20 pieces

  • Animal, Fish [Hollow Stud Mouth] Orange Part 64648 Element 4623481 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Orange Part 11477 Element 6055069 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Orange Part 54200 Element 4504371 or 4248195 1 spare in the box ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Orange Part 85984 Element 6068996 or 4648855 ×3
  • Brick Sloped 45° 2 x 2 Orange Part 3039 Element 4118828 ×1
  • Plate 1 x 1 Orange Part 3024 Element 4524929 or 4203454 1 spare in the box ×2
  • Plate 1 x 4 Orange Part 3710 Element 4118782 ×1
  • Plate 1 x 6 Orange Part 3666 Element 4173332 or 4122466 ×1
  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×4
  • Tile 2 x 2 with Groove Orange Part 3068b Element 4542142 or 4125268 ×1

Dark Bluish Gray 15 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box ×2
  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 1 spare in the box ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×1
  • Plate 2 x 2 Corner Dark Bluish Gray Part 2420 Element 4210635 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Dark Bluish Gray Part 61252 Element 6360111 or 4579354 ×1
  • Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 ×8
  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×1

Tan 15 pieces

  • Bar 4L (Lightsaber Blade / Wand) Tan Part 30374 Element 6116614 or 4508646 ×2
  • Brick 1 x 1 Tan Part 3005 Element 4113915 or 300505 ×1
  • Brick 1 x 2 Tan Part 3004 Element 4109995 or 300405 ×1
  • Plate 2 x 2 Corner Tan Part 2420 Element 4114077 or 242005 ×1
  • Plate 2 x 8 Tan Part 3034 Element 4113988 or 303405 ×1
  • Plate 4 x 6 Tan Part 3032 Element 4114001 ×1
  • Plate Round Corner 4 x 4 Tan Part 30565 Element 4570516 or 4295315 ×2
  • Plate Round Corners 2 x 6 Double Tan Part 18980 Element 6210759 ×2
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×4

Blue 8 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×8

Medium Lavender 8 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Medium Lavender Part 11477 Element 6136331 ×2
  • Brick Curved 2 x 2 x 2/3 Medium Lavender Part 15068 Element 6139090 ×3
  • Plate 1 x 4 Medium Lavender Part 3710 Element 6015108 or 4619524 ×2
  • Tile 1 x 2 with Groove Medium Lavender Part 3069b Element 6152645 ×1

Trans-Light Blue 7 pieces

  • Glass for Window 1 x 4 x 3 [Opening] Trans-Light Blue Part 60603 Element 6514143 or 6253735 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×6

Dark Pink 6 pieces

  • Plate 1 x 4 Dark Pink Part 3710 Element 6161222 or 6015823 ×1
  • Plate 2 x 3 Dark Pink Part 3021 Element 6060801 or 4245289 ×2
  • Plate 2 x 4 Dark Pink Part 3020 Element 6056263 or 6015824 ×2
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Dark Pink Part 18674 Element 6223767 ×1

Trans-Dark Pink 6 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Dark Pink Part 6141 Element 6514060 or 6240230 1 spare in the box ×6

Yellow 6 pieces

  • Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×4
  • Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 1 spare in the box ×1
  • Plate Special 1 x 2 with Clip Horizontal on Side Yellow Part 11476 Element 6313121 or 6179329 ×1

Bright Pink 4 pieces

  • Plant, Beehive / Nest Bright Pink Part 35574 Element 6519486 or 6229124 ×1
  • Plate Round 1 x 1 with Solid Stud Bright Pink Part 6141 Element 4517996 1 spare in the box ×3

Pearl Gold 3 pieces

  • Chain 6L [5 Links] Pearl Gold Part 92338 Element 6323688 or 4600501 ×2
  • Weapon Trident Pearl Gold Part 92290 Element 6270116 or 4595077 1 spare in the box ×1

Dark Green 2 pieces

  • Brick 1 x 1 Dark Green Part 3005 Element 6618073 or 4521915 ×2

Dark Turquoise 2 pieces

  • Animal / Plant, Coral / Sea Weed Dark Turquoise Part 49577 Element 6262134 ×2

Metallic Silver 2 pieces

  • Dish 3 x 3 Inverted [Radar] Metallic Silver Part 43898 Element 6051541 or 4296514 ×1
  • Technic Ball Joint Metallic Silver Part 32474 Element 6082975 ×1

Flat Silver 1 piece

  • Tile Round 1 x 1 with Black Coin Print with 5 Mark Flat Silver Part 98138pr0024 Element 6322903 or 6078241 1 spare in the box ×1

Green 1 piece

  • Tile 1 x 2 with '100' Banknote Print Green Part 3069bpr0100 Element 4295260 or 82317 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 41337-1 [No Color/Any Color] Part 65017 Element 6277443 ×1

Minifigures 2 figures

  • Mia - Dark Purple Top, Lime Trousers Minifigure, checked as a whole figure ×1
  • Vicky - Yellow Plaid Shirt, Yellow Skirt, Glasses 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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy