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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.

Police Action (Explore)

Checking

3656 Police Action (Explore)

36 pieces in 29 part and color combinations.

LEGO counts 32 pieces. This inventory comes from a separate parts catalog and lists 36; 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

Black 13 pieces

  • Duplo Boat with Light Grey Tow Loop, White Bottom and 2 x 4 Studs Inside Black Part 4677c04 Element 4192748 ×1
  • Duplo Brick 1 x 2 x 2 with Star Badge and 'POLICE' Print Black Part 4066pr0015 ×2
  • Duplo Figure, Early, Aviator Hat Blue, Dark Gray Legs, Silver Harness with Yellow Stars Print Black Part 74509pr0015 ×1
  • Duplo Figure, Early, Cap Blue, Dark Gray Legs, Lime Vest and Police Badge Print Black Part 76399pr0003 ×1
  • Duplo Figure, Early, Helmet Blue, Dark Gray Legs, Lime Vest and Police Badge Print Black Part 75729pr0005 ×1
  • Duplo Figure, Early, Helmet Blue, Dark Gray Legs, Sunglasses, Diagonal Zippered Jacket and Police Badge Print Black Part 75729pr0004 ×1
  • Duplo Plate 2 x 2 with Tow Rope Holder Arms Black Part 42026 Element 4186569 or 4162964 ×1
  • Duplo Plate 2 x 4 Black Part 40666 Element 4192931 ×1
  • Duplo Skis Black Part 41977 Element 4191266 ×1
  • Duplo Snowmobile Front with 'POLICE' and Logo Print Black Part 43088pr0001 ×1
  • Duplo Truck Cabin Enclosed with Clear Windows Black Part 31077 Element 4125102 ×1
  • Duplo Truck with 4 x 4 Flatbed Plate, White Base, Silver Hubs, Wide Wheels Black Part 31076c04 ×1

Pearl Light Gray 6 pieces

  • Duplo Cabinet 2 x 2 x 1.5 Pearl Light Gray Part 4890 Element 4282583 or 4193161 ×2
  • Duplo Radar Array Pearl Light Gray Part 4376 Element 4281233 or 4193162 ×1
  • Duplo Rotor 3 Blade for Large Helicopter (Propeller) Pearl Light Gray Part 6346 Element 4192784 ×1
  • Duplo Sign Post Short Pearl Light Gray Part 4375 Element 4289608 or 4281197 ×1
  • Duplo Suitcase Pearl Light Gray Part 6427 Element 4157602 ×1

White 5 pieces

  • Duplo Helicopter Body Large with Black Base, Black Tail, Yellow Tail Rotor and White 'POLICE' Print White Part 6343pr0001 ×1
  • Duplo Motorcycle White Part 74201c01 Element 4578638 or 4567524 ×1
  • Duplo Siren / Flashing Light - Trans-Dark Blue White Part 2318c01 Element 4293313 or 4245647 ×2
  • Duplo Snowmobile Front with 'POLICE' and Logo Print White Part 43088pr0001 ×1

Dark Gray 4 pieces

  • Duplo Helicopter Skids Small Dark Gray Part 6353 Element 4143608 ×3
  • Duplo Support 2 x 3 x 3 with 2 Top Studs Dark Gray Part 41969 Element 4191306 ×1

Red 3 pieces

  • Duplo Brick 1 x 3 x 2 Round Top with 'STOP' in Octagon Road Sign Print Red Part 41970pr0014 Element 4168314 ×1
  • Duplo Fence / Rail 1 x 6 with 5 Rails Red Part 2214 Element 4100712 or 221421 ×1
  • Duplo Winch Drum Narrow with White String and Black Thick Hook with Stud Case and Horizontal Bar Red Part 41169c04 ×1

Green 2 pieces

  • Duplo Plate 2 x 4 Green Part 40666 Element 4256362 or 4157606 ×2

Yellow 2 pieces

  • Duplo Drawer 2 x 2 with Pull Handle Yellow Part 4891 Element 4171348 ×2

Trans-Dark Blue 1 piece

  • Duplo Windscreen 4 x 4 x 2 Curved Trans-Dark Blue Part 17562 Element 4194055 ×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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