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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.

Alpha Team Aquatic Mech

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4789 Alpha Team Aquatic Mech

160 pieces in 75 part and color combinations, plus 1 minifigure.

LEGO counts 164 pieces. This inventory comes from a separate parts catalog and lists 166, 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

Yellow 55 pieces

  • Bar 1 x 4 x 2 Yellow Part 6187 Element 6145160 or 4107090 ×2
  • Box 2 x 2 x 2 [Hollow Studs] Yellow Part 4345b Element 6146457 or 4258381 ×2
  • Brick 2 x 2 Corner Yellow Part 2357 Element 235774 or 235724 ×2
  • Brick Curved 2 x 2 with Lip, No Studs with Mission Deep Sea 'TEE VEE' Print Yellow Part 30602pr0017 Element 4162407 ×1
  • Brick Curved 6 x 1 with Hydraulic Hose and Black Chevrons Print Yellow Part 42022pr0004 Element 4163292 ×2
  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×3
  • Brick Wedged, Sloped Inverted 6 x 4 with 2 Stud Connections Yellow Part 4856a Element 4270871 or 4114164 ×1
  • Equipment Stretcher Holder Yellow Part 30191 Element 4162952 or 3019124 ×2
  • Equipment Support Foot Platform with Black Danger Stripes and Hose Print Yellow Part 41525pr0001 Element 4162149 ×2
  • Hinge 1 x 2 Locking with 2 Fingers and Towball Socket, 9 Teeth Yellow Part 30396 Element 6146964 or 4163290 ×1
  • Hinge Train Gate 2 x 4 Yellow Part 2873 Element 4257348 or 287324 ×1
  • Lever Small Base with Black Lever Yellow Part 298c02 Element 74156 1 spare in the box ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×8
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×4
  • Plate 2 x 8 Yellow Part 3034 Element 303424 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Yellow Part 6019 Element 4247863 or 4107445 ×2
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Yellow Part 4623 Element 4501109 or 4497185 ×3
  • Plate Special 2 x 2 with Grills Yellow Part 41862 Element 4163525 ×2
  • Plate Special 2 x 2 with Pin on Bottom Yellow Part 2476a Element 4120394 ×2
  • Rubber Band 15mm [Square Cross Section] Yellow Part 23229 Element 4125669 or 4124335 ×1
  • Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×1
  • Technic Cylinder 4 x 4 with Pin Holes and Centre Bar, Closed Sides on Bar Yellow Part 41531 Element 6100888 or 4270872 ×2
  • Technic Rotation Joint Ball with Arm - Pin and Hole Ends Yellow Part upn0268c01 Element 4162243 ×4

Black 40 pieces

  • Animal Body Part, Shark / Sawfish Head Black Part 30085 Element 4160224 ×1
  • Animal Body Part, Shark Body, without Bottom Tube Black Part 2547 Element 4160222 ×1
  • Arm Grabber Angled Black Part 30542 Element 4143242 ×2
  • Bar 1 x 3 [Clip / Anti-Stud] Black Part 4735 Element 4141580 or 473576 ×2
  • Bracket 5 x 2 x 2 1/3 with Holes, Smooth Bottom Black Part 6087 Element 4100423 or 608726 ×2
  • Brick 2 x 4 Black Part 3001 Element 300126 ×1
  • Brick Sloped 65° 2 x 2 x 2 Smooth without Bottom Tube Black Part 3678a Element 367826 ×2
  • Brick Special 1 x 2 with Vertical Clip [Thick U Clip] Black Part 30237a ×1
  • Brick Special 2 x 2 x 2 with Rotation Joint Socket and Rear Pin Hole Black Part 41533 Element 4270960 or 4162241 ×2
  • Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole Black Part 41532 Element 4159335 ×1
  • Hinge Vehicle Roof Holder 1 x 4 Black Part 4315 Element 4250225 or 431576 ×1
  • Minifig Footwear Flipper [Thin] Black Part 59275 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Black Part 6019 Element 601976 or 601926 ×4
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×1
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×1
  • Plate Special 1 x 2 with Ladder Black Part 4175 Element 6285241 or 6179557 ×2
  • Propeller 3 Blade 3 Diameter with Axle Cross Black Part 6041 Element 604126 ×2
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×1
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×4

Dark Gray 27 pieces

  • Brick 1 x 2 Dark Gray Part 3004 Element 4113909 or 300427 ×4
  • Brick 1 x 6 Dark Gray Part 3009 Element 4114082 or 300927 ×1
  • Brick 2 x 2 Dark Gray Part 3003 Element 4110008 or 300327 ×2
  • Brick Sloped 45° 2 x 2 Dark Gray Part 3039 Element 4109984 ×1
  • Equipment Binoculars Dark Gray Part 30162 Element 4109923 ×1
  • Plate 2 x 2 Dark Gray Part 3022 Element 4114003 or 302227 ×3
  • Plate 2 x 2 Corner Dark Gray Part 2420 Element 4124091 or 242027 ×2
  • Plate 2 x 4 Dark Gray Part 3020 Element 4112232 or 302027 ×4
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Dark Gray Part 4081b Element 4169162 or 408127 ×2
  • Tile Special 2 x 2 with Top Pin Dark Gray Part 2460 Element 4121763 or 246027 ×4
  • Wedge Plate 3 x 4 without Stud Notches Dark Gray Part 4859 Element 4181035 ×2
  • Wedge Plate 3 x 6 Cut Corners Dark Gray Part 2419 Element 241927 ×1

Light Gray 18 pieces

  • Brick Arch 1 x 4 Light Gray Part 3659 Element 365902 ×1
  • Brick Special 1 x 2 with Handle Light Gray Part 30236 Element 4113203 ×3
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×4
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Light Gray Part 4085c Element 408502 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×2
  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Gray Part 4150pr0022 Element 4140520 ×2

Trans-Neon Green 13 pieces

  • Brick Curved 1 x 4 with Sloped Ends and Two Top Studs Trans-Neon Green Part 40996 Element 4154081 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 1 spare in the box ×10
  • Propeller 8 Blade 5 Diameter Trans-Neon Green Part 41530 Element 6109915 or 4159686 ×2

Trans-Brown 3 pieces

  • Box 2 x 2 x 2 Door with Slot Trans-Brown Part 4346 Element 4167257 ×2
  • Windscreen 6 x 4 x 2 Wedge Curved Trans-Brown Part 41883 Element 4286384 or 4163015 ×1

Green 2 pieces

  • Plant, Sea Grass Green Part 30093 Element 4568215 or 4163425 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Green Part 4032a Element 403228 ×1

Brown 1 piece

  • Hair Flat Top, Tall Brown Part 30608 Element 4144400 ×1

Red 1 piece

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1

Minifigures 1 figure

  • Dash, Helmet and Visor 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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