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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.

Wave Cops

Checking

4012 Wave Cops

90 pieces in 63 part and color combinations, plus 2 minifigures.

LEGO counts 99 pieces. This inventory comes from a separate parts catalog and lists 100, including the 10 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Bricks 14 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×2
  • Brick 1 x 2 Black Part 3004 Element 300426 ×6
  • Brick 1 x 6 Black Part 3009 Element 300926 ×3
  • Brick 1 x 10 Light Gray Part 6111 Element 611102 ×2
  • Brick 1 x 4 Light Gray Part 3010 Element 301002 ×1

Plates 10 pieces

  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×4
  • Plate 1 x 8 Red Part 3460 Element 346021 ×1
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×1
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×1
  • Plate 2 x 12 White Part 2445 Element 6552091 or 244501 ×1

Plates Special 9 pieces

  • Plate Special 1 x 2 Side Handle [Free Ends] Light Gray Part 2540 Element 4140584 or 254052 ×1
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Light Gray Part 3839b Element 383902 ×1
  • Bracket 1 x 2 - 1 x 4 [Square Corners] Red Part 2436 Element 4282742 or 243621 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Red Part 4081b Element 6281994 or 4632572 ×1
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Red Part 4085c Element 408521 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Red Part 2540 Element 4140585 or 254021 ×1
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] White Part 6019 Element 601951 or 601901 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] White Part 4623 Element 462301 ×1

Plates Round Curved and Dishes 8 pieces

  • Dish 2 x 2 Inverted [Radar] Light Gray Part 4740 Element 474002 ×1
  • Plate Round 1 x 1 with Solid Stud Light Gray Part 6141 Element 614102 ×1
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 Also in Trans-Red ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 Also in Red ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×2
  • Dish 2 x 2 Inverted [Radar] White Part 4740 Element 6601845 or 474001 ×1

Bricks Sloped 7 pieces

  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×2
  • Brick Sloped 33° 3 x 6 Trans-Light Blue Part 3939 Element 393942 ×2
  • Brick Sloped 33° 3 x 6 White Part 3939 Element 4261622 or 620801 ×1
  • Brick Sloped 45° 2 x 2 with Phone and Minifig Print White Part 3039pr9958 Element 81893 ×1
  • Brick Sloped 45° 2 x 2 with Radar Screen Print White Part 3039pr0005 Element 4261941 or 82024 ×1

Tiles 7 pieces

  • Tile 1 x 1 with Groove Trans-Dark Blue Part 3070b Element 4541723 or 4218438 ×2
  • Tile 1 x 1 with Groove Trans-Green Part 3070b Element 6581818 or 6254249 ×1
  • Tile 1 x 1 with Groove Trans-Red Part 3070b Element 6581817 or 6254248 ×1
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×2
  • Tile 2 x 2 with Gauges Print White Part 3068bpr0076 Element 4227915 or 82333 ×1

Hinges, Arms and Turntables 4 pieces

  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Hinge Vehicle Roof 4 x 4 Sunroof with Ledges White Part 2349b Element 4177755 or 234901 ×1
  • Hinge Vehicle Roof Holder 1 x 4 White Part 4315 Element 4214079 or 4190507 ×1
  • Turntable 2 x 2 Plate, Base White Part 3680 Element 368001 ×1

Panels 4 pieces

  • Panel 1 x 2 x 1 [Square Corners] Trans-Light Blue Part 4865a Element 4618924 or 4239181 ×4

Plates Wedged 4 pieces

  • Wedge Plate 3 x 3 Cut Corner White Part 2450 Element 6601842 or 4280148 ×4

Transportation - Sea and Air 4 pieces

  • Boat 25 x 10 x 4 1/3 [Complete Assembly] Black Part 2372c01 ×1
  • Boat, Mast 2 x 2 x 3 Inclined with Stud on Top and Two Sides White Part 4289 Element 6108866 or 4253859 ×1
  • Wing, Tail 4 x 1 x 3 White Part 2340 Element 6347936 or 234024 ×2

String, Bands and Reels 3 pieces

  • String Cord Medium Thickness 30cm Black Part 14728c30 Element 4500572 ×1
  • String Reel 2 x 2 Winch Drum Black Part 2585 Element 4188195 or 4160809 ×1
  • String Reel 2 x 2 Winch Holder Red Part 2584 Element 4188300 or 4161162 ×1

Tiles Special 3 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Light Gray Part 2555 Element 255502 ×1
  • Tile Special 1 x 2 with Handle Red Part 2432 Element 243221 ×1
  • Tile Special 1 x 1 with Clip and Straight Tips White Part 2555 Element 255501 ×1

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [No Top Groove] Light Gray Part 4589 Element 458902 ×2

Bricks Special 2 pieces

  • Brick Special 2 x 6 x 2 Weight with Sealed Bottom and Dimples on Ends Black Part 73090b Element 6094053 or 73843 ×1
  • Brick Special 1 x 2 x 2/3 with Studs on Sides Light Gray Part 4595 Element 459502 ×1

Bricks Wedged 2 pieces

  • Brick Wedged, Angled 3 x 2 Left Black Part 6565 Element 4527766 or 656526 ×1
  • Brick Wedged, Angled 3 x 2 Right Black Part 6564 Element 4526931 or 656426 ×1

Minifig Accessories 2 pieces

  • Equipment Radio [Extended Handle, Compact Speaker Grille] Black Part 3962b Element 396226 ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Light Gray Part 4349 Element 434902 ×1

Transportation - Land 2 pieces

  • Steering Stand 1 x 2 with Black Steering Wheel Blue Part 3829c01 Element 9566 ×1
  • Seat / Chair 2 x 2 Red Part 4079 ×1

Bars, Ladders and Fences 1 piece

  • Antenna 8H Whip Red Part 2569 Element 256921 ×1

Stickers 1 piece

  • Sticker Sheet for Set 4012-1 [No Color/Any Color] Part 170903 ×1

Windows and Doors 1 piece

  • Glass 2 x 3 for Hinge Car Roof 4 x 4 Sunroof with Ridges Trans-Dark Blue Part 2348b Element 234843 ×1

Minifigures 2 figures

  • Policeman with Life Jacket Minifigure, checked as a whole figure ×2

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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