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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.

Deep Sea Treasure Hunter

Checking

7770 Deep Sea Treasure Hunter

73 pieces in 49 part and color combinations, plus 1 minifigure.

LEGO counts 75 pieces. This inventory comes from a separate parts catalog and lists 79, including the 6 parts inside the minifigures; the two do not always count the same elements, so their totals differ. 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.

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Piece checklist

Plates Special 7 pieces

  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×2
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Light Bluish Gray Part 4623 Element 4211505 ×3
  • Plate Special 6 x 6 x 2/3 Cross with Dome Light Bluish Gray Part 30303 Element 4211611 ×1
  • Plate Special 1 x 2 Side Handle [Free Ends] Yellow Part 2540 Element 4140587 or 254024 ×1

Minifig Accessories 6 pieces

  • Minifig Footwear Flipper [Thin] Black Part 59275 ×2
  • Money / Coin with "10" Sans-serif Type Chrome Gold Part 57503 ×1
  • Money / Coin with "20" Sans-serif Type Chrome Gold Part 57504 ×1
  • Money / Coin with "30" Sans-serif Type Chrome Gold Part 57505 ×1
  • Money / Coin with "40" Sans-serif Type Chrome Gold Part 57506 ×1

Technic Bushes 6 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×6

Bricks Round and Cones 5 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Dark Blue Part 4589 Element 618843 ×2
  • Cone 1 x 1 [No Top Groove] Trans-Green Part 4589 Element 4108129 or 618848 ×1
  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×2

Bricks Sloped 5 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×1
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Dark Bluish Gray Part 4460a ×1
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Bluish Gray Part 3040b Element 4211614 ×1
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Yellow Part 3747a ×2

Technic Connectors 4 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Dark Bluish Gray Part 6538b Element 6538199 or 4210672 ×2
  • Technic Axle Connector with Axle Hole Yellow Part 32039 Element 4107800 or 3203924 ×2

Plates 3 pieces

  • Plate 4 x 4 Dark Bluish Gray Part 3031 Element 4243831 or 4211089 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×1
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×1

Plates Wedged 3 pieces

  • Wedge Plate 3 x 2 Left Black Part 43723 Element 4180536 ×1
  • Wedge Plate 3 x 2 Right Black Part 43722 Element 4180508 ×1
  • Wedge Plate 3 x 4 with Stud Notches Black Part 48183 Element 4238912 ×1

Technic Axles 3 pieces

  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×2
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×1

Transportation - Sea and Air 3 pieces

  • Propeller 3 Blade 3 Diameter with Axle Cross Black Part 6041 Element 604126 ×2
  • Tail Shuttle, Small with Double-Sided Black Trident and Sub Deep Diving Print Yellow Part 44661pr0001 Element 4500442 ×1

Animals / Creatures 2 pieces

  • Animal, Snake, Small Red Part 30115 Element 6286432 or 4114052 ×2

Bars, Ladders and Fences 2 pieces

  • Bar 1L with Clip Dark Bluish Gray Part 48729a Element 4222196 ×2

Bricks Curved 2 pieces

  • Brick Curved 3 x 1 No Studs Yellow Part 50950 Element 4247771 ×2

Containers 2 pieces

  • Treasure Chest Bottom with Rear Slots, with Groove Reddish Brown Part 4738b Element 4280114 or 4211162 ×1
  • Treasure Chest Lid [Thick Hinge] Reddish Brown Part 4739a Element 6254220 or 6167676 ×1

Hinges, Arms and Turntables 2 pieces

  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×1
  • Hinge Brick 1 x 2 Top Plate Thin Yellow Part 3938 Element 6078086 or 393824 ×1

Minifig Shields, Weapons, & Tools 2 pieces

  • Weapon Spear Gun with Rounded Trigger and Thin Spear Base Dark Bluish Gray Part 30088 Element 4210677 ×2

Minifig Upper Body 2 pieces

  • Arm Mechanical with Clip [Thin Support] Black Part 53989 Element 4623154 or 4294996 ×2

Rock 2 pieces

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Dark Blue Part 30153 Element 6513973 or 6247793 ×1
  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Green Part 30153 Element 6513970 or 6247788 ×1

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Black Part 32064b ×2

Technic Pins 2 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2

Tiles 2 pieces

  • Tile 1 x 2 with Avionics Copper, Red & Silver Controls Print Black Part 3069bpr0070 Element 6021512 or 4162982 ×1
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1

Tiles Special 2 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Yellow Part 2412b Element 241224 ×2

Bricks 1 piece

  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×1

Flags, Banners and Signs 1 piece

  • Flag 2 x 2 Trapezoid with Flat Area between Clips Black Part 44676 Element 4184617 ×1

Minifig Heads 1 piece

  • Minifig Head Skeleton, Evil Skull Print White Part 3626bpr0190 Element 4162427 ×1

Plants & Trees 1 piece

  • Plant, Sea Grass Trans-Green Part 30093 Element 4256382 or 4247326 ×1

Minifigures 1 figure

  • Aquaraider Diver 8 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.

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