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.

Crystal Explorer Sub

Checking

6175 Crystal Explorer Sub

157 pieces in 77 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

Yellow 74 pieces

  • Arm Grab Jaw Holder, 3 Fingers Yellow Part 4220 Element 4107528 or 422024 ×1
  • Arm Piece Straight with 2 and 3 Fingers Yellow Part 3612 Element 610124 ×6
  • Arm Piece with Pin, 3 Fingers Yellow Part 6217 Element 604724 ×1
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×2
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×2
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×1
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×1
  • Brick 2 x 2 Corner Yellow Part 2357 Element 235774 or 235724 ×12
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×2
  • Brick 2 x 4 x 2 with Holes on Sides Yellow Part 6061 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Yellow Part 6091 Element 6388492 or 6361082 ×2
  • Brick Sloped 45° 2 x 2 Yellow Part 3039 Element 303924 ×2
  • Brick Sloped 45° 2 x 2 with Grid Screen, Shark, and Controls on Red Panel Print (Aquazone) Yellow Part 3039pr9980 Element 81821 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Yellow Part 3747a ×2
  • Brick Special Octagonal 2 x 2 x 3 1/3 with Side Studs Yellow Part 6042 Element 4247901 or 604224 ×4
  • Brick Wedged, Sloped 3 x 3 x 2 Facet Top Yellow Part 2463 Element 246324 ×2
  • Brick Wedged, Sloped Inverted 11 x 4 x 2 2/3 Cockpit Yellow Part 6058 Element 605824 ×1
  • Hinge Panel 2 x 4 x 3 1/3 with Yellow Submarine Print Yellow Part 2582pr0006 Element 81833 ×2
  • Hinge Vehicle Roof Holder 1 x 4 Yellow Part 4315 Element 4253788 or 4239251 ×2
  • Plate 1 x 1 Yellow Part 3024 Element 302424 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×1
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1
  • Plate 2 x 2 Corner Yellow Part 2420 Element 242074 or 242024 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×2
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Yellow Part 4085c Element 408524 ×6
  • Propeller Housing Yellow Part 6040 Element 604024 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Yellow Part 3829c01 Element 9553 ×2
  • Tile 1 x 1 with Red and Black Buttons Print Yellow Part 3070bpr0031 Element 81183 ×2
  • Wedge Plate 3 x 3 Cut Corner Yellow Part 2450 Element 4240407 or 245024 ×2

Black 48 pieces

  • Animal, Octopus [Plain] Black Part 6086 Element 6096092 or 4273962 ×1
  • Arm Grab Jaw Black Part 4221 Element 422126 ×2
  • Arm Holder Brick 1 x 2 with 2 Horizontal Fingers Black Part 30014 Element 3001426 ×2
  • Arm Piece Straight with 2 and 3 Fingers Black Part 3612 Element 610126 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Brick Special Octagonal 2 x 2 x 3 1/3 Black Part 6037 Element 4247862 or 603726 ×2
  • Brick Special Octagonal 2 x 2 x 3 1/3 with Side Studs Black Part 6042 Element 4247905 or 604226 ×2
  • Cone 2 x 2 x 1 2/3 Octagonal, Open Stud Black Part 6039 Element 4247938 or 4161038 ×2
  • Equipment Compass with White Lines, Yellow Letters Print Black Part 70001pr0001 Element 75171 ×1
  • Equipment Control Panel Black Part 2342 Element 4164402 or 234226 ×1
  • Hinge Tile 1 x 4 Black Part 4625 Element 4280138 or 462526 ×3
  • Magnet Cylindrical Black Part 73092 Element 73092 ×2
  • Magnet Holder 2 x 3 Black Part 2607 Element 260726 ×1
  • Magnet Holder Tile 2 x 2 - Tall Arms with Deep Notch Black Part 2609b Element 4502266 or 4163970 ×1
  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 1 x 8 Black Part 3460 Element 346026 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 2 x 4 Black Part 3020 Element 302026 ×2
  • Plate 6 x 16 Black Part 3027 Element 302726 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×1
  • Tail 4 x 2 x 2 Black Part 3479 Element 347976 or 347926 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×8
  • Wedge Plate 3 x 4 without Stud Notches Black Part 4859 ×1
  • Wedge Plate 8 x 4 Wing Left Black Part 3933 Element 4189089 or 393326 ×1
  • Wedge Plate 8 x 4 Wing Right with Stud Notch Black Part 3934 Element 4189090 or 393426 ×1

Trans-Neon Orange 15 pieces

  • Antenna 1 x 4 with Rounded Top Trans-Neon Orange Part 3957a Element 4560958 or 4129565 ×2
  • Antenna 8H Whip Trans-Neon Orange Part 2569 Element 6164384 or 6124861 ×2
  • Arm Piece 90° Turn [2 / 3 Fingers] Trans-Neon Orange Part 412 Element 3001547 ×4
  • Box 2 x 2 x 2 Door with Slot Trans-Neon Orange Part 4346 Element 3005947 ×1
  • Box 2 x 2 x 2 [Hollow Studs] Trans-Neon Orange Part 4345b Element 3006047 ×1
  • Brick Special 1 x 1 with Headlight Trans-Neon Orange Part 4070 Element 3006947 ×2
  • Propeller 3 Blade 3 Diameter with Axle Cross Trans-Neon Orange Part 6041 Element 4165521 or 604147 ×3

Chrome Silver 6 pieces

  • Rock 1 x 1 Crystal 5 Point Chrome Silver Part 30385 Element 4119342 ×2
  • Weapon Dagger / Knife Chrome Silver Part 37 Element 70749 ×2
  • Weapon Harpoon [4 Grooves on Shaft] Chrome Silver Part 57467 ×2

Trans-Dark Blue 5 pieces

  • Cockpit 5 x 8 x 3 (Windscreen Bottom) Trans-Dark Blue Part 6085 Element 608543 ×1
  • Hinge Vehicle Roof 4 x 4 Trans-Dark Blue Part 4213 Element 3000143 ×1
  • Windscreen 10 x 4 x 2 1/3 Canopy Trans-Dark Blue Part 2507 Element 250793 or 250743 ×1
  • Windscreen 5 x 8 x 3 Trans-Dark Blue Part 2826 Element 282643 ×1
  • Windscreen 8 x 3 1/2 x 4 1/6 Half Octagon Aquanaut Sub Top Trans-Dark Blue Part 6084 Element 608443 ×1

Blue 4 pieces

  • Minifig Footwear Flipper [Thin] Blue Part 59275 ×4

Light Gray 3 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×1

Green 1 piece

  • Plant, Bush 2 x 2 x 4 Green Part 6064 Element 6269009 or 606428 ×1

Red 1 piece

  • Plant, Prickly Bush 2 x 2 x 3 Extension with 2 x 2 center Red Part 6065 Element 606521 ×1

Minifigures 2 figures

  • Aquanaut 1 Minifigure, checked as a whole figure ×1
  • Aquanaut 3 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