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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.

River Response

Checking

6451 River Response

137 pieces in 66 part and color combinations, plus 3 minifigures.

The official piece count includes the 16 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.

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Piece checklist

Plates 30 pieces

  • Plate 1 x 10 Black Part 4477 Element 447726 ×4
  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×1
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 6 x 16 Black Part 3027 Element 302726 ×1
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×1
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×2
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 ×2
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×7
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×2
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×1

Bricks Sloped 21 pieces

  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×16
  • Brick Sloped 33° 3 x 1 Yellow Part 4286 Element 428624 ×2
  • Brick Sloped 45° 2 x 4 Yellow Part 3037 Element 4219911 or 303724 ×1
  • Brick Sloped Inverted 45° 2 x 2 Double Convex Yellow Part 3676 Element 4264338 or 4254998 ×2

Plates Special 15 pieces

  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Light Gray Part 4085c Element 408502 ×5
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Light Gray Part 4623 Element 462302 ×2
  • Plate Special 2 x 2 with Wheel Holders Light Gray Part 4600 Element 460002 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Yellow Part 3794a ×2

Panels 10 pieces

  • Panel 1 x 2 x 1 [Square Corners] Black Part 4865a Element 486526 ×6
  • Panel 1 x 2 x 2 [Hollow Studs] Black Part 4864b Element 486426 ×4

Hinges, Arms and Turntables 9 pieces

  • Hinge Bar with 3 Fingers and End Stud (Control Lever) Black Part 2433 Element 4497182 or 243326 ×1
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×2
  • Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs Black Part 4276b Element 4264363 or 4256402 ×2
  • Hinge Brick 1 x 2 Top Plate Thin Light Gray Part 3938 Element 393802 ×2
  • Hinge Bar with 3 Fingers and End Stud (Control Lever) Red Part 2433 Element 4238748 or 243321 ×2

Wheels and Tyres 8 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4
  • Wheel 8 x 6 White Part 4624 Element 462401 ×4

Minifig Accessories 6 pieces

  • Minifig Footwear Flipper [Thin] Black Part 59275 ×2
  • Equipment Binoculars Dark Gray Part 30162 Element 4109923 ×1
  • Equipment Zip Line Handle Dark Gray Part 30229 Element 4113835 ×1
  • Tap 1 x 1 with Hole in Spout Red Part 4599a ×1
  • Tap 1 x 1 with Hole in Spout White Part 4599a ×1

Bars, Ladders and Fences 5 pieces

  • Bar 1 x 6 [Closed Studs] Black Part 6140 Element 6415609 or 614026 ×2
  • Lever Small Base with Light Gray Lever Black Part 298c03 Element 73667 ×1
  • Antenna 8H Whip Red Part 2569 Element 256921 ×2

Bricks Wedged 4 pieces

  • Brick Wedged, Sloped Inverted 4 x 4 Triple [2 Connections between Front Studs] Black Part 4855 Element 4550004 or 4278249 ×2
  • Brick Wedged, Sloped Inverted 6 x 4 with 2 Stud Connections Yellow Part 4856a Element 4270871 or 4114164 ×2

Plates Round Curved and Dishes 4 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Light Gray Part 2654 Element 265402 ×3
  • Dish 2 x 2 Inverted [Radar] Trans-Neon Green Part 4740 Element 6245297 or 4112517 ×1

Tiles Special 4 pieces

  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×2
  • Tile Special 1 x 2 with Handle Light Gray Part 2432 Element 243202 ×2

Bricks Round and Cones 3 pieces

  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×1
  • Cone 1 x 1 [No Top Groove] Trans-Green Part 4589 Element 4108129 or 618848 ×1
  • Cone 1 x 1 [No Top Groove] Trans-Red Part 4589 Element 618841 ×1

String, Bands and Reels 3 pieces

  • String Cord Thin (0.5mm) [Undetermined Length] Black Part 56823 Element 7009426 ×1
  • String Reel 2 x 2 Winch Drum Black Part 2585 Element 4188195 or 4160809 ×1
  • String Reel 2 x 2 Winch Holder Light Gray Part 2584 Element 4194007 or 4160808 ×1

Transportation - Sea and Air 3 pieces

  • Wing, Tail 4 x 1 x 3 Black Part 2340 Element 6591863 or 4651541 ×2
  • Boat / Rubber Raft / Dinghy 6 x 10 Yellow Part 30086c01 Element 6099480 or 4501130 ×1

Bricks 2 pieces

  • Brick 1 x 16 Yellow Part 2465 Element 4264963 or 246524 ×2

Minifig Shields, Weapons, & Tools 2 pieces

  • Tool Circular Saw Dark Gray Part 30194 Element 4113834 ×1
  • Tool Grappling Hook Dark Gray Part 30192 Element 4113833 ×1

Plates Wedged 2 pieces

  • Wedge Plate 3 x 4 without Stud Notches Black Part 4859 ×2

Transportation - Land 2 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel White Part 3829c01 Element 4208543 or 9551 ×2

Minifig Headwear 1 piece

  • Helmet, Standard White Part 2446 Element 6138832 or 4583503 ×1

Minifig Headwear Accessories 1 piece

  • Headwear Accessory Visor For Standard Helmet Trans-Dark Blue Part 2447 Element 6431592 or 6000296 ×1

Stickers 1 piece

  • Sticker Sheet for Set 6451-1 [No Color/Any Color] Part 71620 Element 4113892 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 4 x 4 x 1 Black Part 6238 Element 4195539 or 4114163 ×1

Minifigures 3 figures

  • Res-Q Man, Black Cap, Yellow Life Vest, Moustache Minifigure, checked as a whole figure ×1
  • Res-Q Man, Black Cap, Yellow Life Vest, Sunglasses Minifigure, checked as a whole figure ×1
  • Res-Q Man, Helmet with Mask, Airtanks, Headset 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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