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 Car

Checking

621 Police Car

31 pieces in 18 part and color combinations, plus 1 minifigure.

LEGO counts 39 pieces. This inventory comes from a separate parts catalog and lists 35, including the 4 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.

Show

Piece checklist

White 14 pieces

  • Door 1 x 3 x 1 Left White Part 3822 Element 4527637 or 4161547 ×1
  • Door 1 x 3 x 1 Right White Part 3821 Element 4537987 or 4527638 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Steering Stand 1 x 2 with Black Steering Wheel White Part 3829c01 Element 4208543 or 9551 ×1
  • Vehicle Base 4 x 10 x 2/3 with 2 x 2 Recessed Center with Center Hole, 1 x 2 Cutouts (Early Version) White Part 4212a ×1
  • Wheel Arch, Mudguard 2 x 4 Studded White Part 3788 Element 4289272 ×2

Black 8 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×1
  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4

Light Gray 6 pieces

  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×1
  • Plate Special 2 x 2 with Wheels Red Light Gray Part 122c01 ×2

Trans-Clear 1 piece

  • Windscreen 2 x 4 x 2 Trans-Clear Part 3823 Element 6581801 or 6253681 ×1

Trans-Dark Blue 1 piece

  • Brick Round 1 x 1 Open Stud Trans-Dark Blue Part 3062b Element 6514233 or 6238044 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 621-1 [No Color/Any Color] Part 4711 ×1

Minifigures 1 figure

  • Black Torso, Black Legs, White Hat 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.