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.

Water Spider

Checking

3017-2 Water Spider

22 pieces in 13 part and color combinations, plus 1 minifigure.

The piece count includes the 4 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.

Show

Piece checklist

Plates Special 10 pieces

  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Gray Part 2540 Element 4140589 or 4109721 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Light Gray Part 6019 Element 601952 or 601902 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×1
  • Bracket 1 x 2 - 1 x 4 [Square Corners] Red Part 2436 Element 4282742 or 243621 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Red Part 4085c Element 408521 ×4

Minifig Shields, Weapons, & Tools 4 pieces

  • Weapon Bow and Arrow [Large] Brown Part 4499 Element 449925 ×1
  • Weapon Pike / Spear Round End Brown Part 4497 ×2
  • Weapon Sword / Katana [Octagonal Guard] Light Gray Part 30173a Element 4114205 ×1

Bricks Special 3 pieces

  • Brick Special 1 x 4 Palisade [aka Log] Brown Part 30137 Element 4105290 ×3

Tiles Special 2 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Black Part 2555 Element 255526 ×2

Bricks Round and Cones 1 piece

  • Brick Round 1 x 1 Open Stud Dark Gray Part 3062b Element 4113912 or 306227 ×1

Minifig Accessories 1 piece

  • Equipment Oar / Paddle Red Part 2542 Element 4189099 or 4106939 ×1

Plates 1 piece

  • Plate 1 x 4 Black Part 3710 Element 371026 ×1

Minifigures 1 figure

  • Ninja, Black 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.