Free tool

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

3607 Police Action (Explore)

8 pieces in 8 part and color combinations.

LEGO counts 7 pieces. This inventory comes from a separate parts catalog and lists 8; 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.

Show

Piece checklist

White 3 pieces

  • Duplo Fence 1 x 6 x 2 with Red Stripes Print White Part 31021pr0001 Element 6020578 or 4583393 ×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 ×1

Black 2 pieces

  • Duplo Figure, Early, Helmet Blue, Dark Gray Legs, Jacket with Zipper, Tie, and Police Badge Print Black Part 75729pr0006 ×1
  • Duplo Support 2 x 3 x 3 with 2 Top Studs Black Part 41969 Element 4162956 ×1

Blue 1 piece

  • Duplo Brick 2 x 2 Blue Part 3437 Element 343723 ×1

Red 1 piece

  • Duplo Brick 1 x 3 x 2 Round Top with 'STOP' in Octagon Road Sign Print Red Part 41970pr0014 Element 4168314 ×1

Yellow 1 piece

  • Duplo Brick 2 x 2 Slope 45° with Race Car Print Yellow Part 6474pr9978 ×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.