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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.

Knights' Catapult Defense

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7091 Knights' Catapult Defense

102 pieces in 45 part and color combinations, plus 4 minifigures.

The piece count includes the 21 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.

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Piece checklist

Black 36 pieces

  • Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Black Part 30553 Element 4143372 ×2
  • Hinge Plate 1 x 2 Locking with 1 Finger On Top Black Part 30383 Element 6338799 or 4144575 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×2
  • Technic Beam 1 x 3 Thick Black Part 32523 Element 4142822 or 3252326 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Black Part 32064b ×2
  • Technic Brick 6 x 8 with 4 x 6 Opening Black Part 32532 Element 6448394 or 4188143 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×13
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×4
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×2
  • Tile Special 1 x 1 with Clip and Straight Tips Black Part 2555 Element 255526 ×1
  • Turntable 4 x 4 Square Base Black Part 3403 Element 340326 ×1
  • Turntable 4 x 4 Top Black Part 3404 Element 4221659 or 340426 ×1
  • Wedge Plate 4 x 4 Cut Corner Black Part 30503 Element 4160025 ×2

Reddish Brown 16 pieces

  • Barrel Half Large Reddish Brown Part 4424 Element 4263459 ×1
  • Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Reddish Brown Part 6222 Element 6177805 or 4223681 ×4
  • Brick Special 1 x 2 with Grille Reddish Brown Part 2877 Element 4223303 ×2
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×3
  • Plate 4 x 4 Reddish Brown Part 3031 Element 4243838 or 4225868 ×1
  • Plate 4 x 6 Reddish Brown Part 3032 Element 4271874 or 4211213 ×3
  • Technic Axle Connector Hub with 4 Bars at 90° Reddish Brown Part 48723 Element 4252456 ×2

Dark Bluish Gray 12 pieces

  • Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove Dark Bluish Gray Part 44301a Element 4210883 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Dark Bluish Gray Part 3794a ×1
  • Rock Boulder 4 x 4, Bottom Dark Bluish Gray Part 30294 Element 4506779 ×1
  • Rock Boulder 4 x 4, Top Dark Bluish Gray Part 30293 Element 4506778 ×1
  • Shield Round Flat with Silver Skull on Dark Red Print Dark Bluish Gray Part 59231pr0001 Element 4506836 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Dark Bluish Gray Part 3701 Element 4213607 or 370127 ×2
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Dark Bluish Gray Part 32530 Element 4210763 ×2

Pearl Gold 10 pieces

  • Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Pearl Gold Part 3048c Element 4295174 ×10

Light Bluish Gray 7 pieces

  • Bracket 1 x 2 - 2 x 2 Light Bluish Gray Part 44728 Element 6117967 or 6009014 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Light Bluish Gray Part 2654 Element 4278273 or 4276273 ×1
  • Shield Ovoid with Silver Skull on Dark Red Print Light Bluish Gray Part 2586pr0016 Element 4506835 ×1
  • Shield Triangular with Crown on Dark / Medium Blue Quarters Print Light Bluish Gray Part 3846pr0016 Element 4506823 ×2
  • Technic Pin Long without Friction Ridges - Single Slot Light Bluish Gray Part 32556a Element 4211709 ×2

Pearl Light Gray 6 pieces

  • Weapon Crossbow and Bolt Pearl Light Gray Part 2570 Element 4504905 ×1
  • Weapon Mace / Flail Spiked Pearl Light Gray Part 59232 Element 4505111 ×1
  • Weapon Pike / Spear Round End Pearl Light Gray Part 4497 Element 4278811 or 4267358 ×3
  • Weapon Sword / Shortsword Pearl Light Gray Part 3847 Element 4505002 ×1

Dark Blue 4 pieces

  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Dark Blue Part 4460a ×4

Tan 4 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

White 4 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small White Part 53451 Element 6270106 or 4568387 1 spare in the box ×2
  • Cone 1 x 1 [No Top Groove] White Part 4589 Element 458901 ×2

Red 3 pieces

  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Red Part 44302a Element 6249371 or 6074865 ×2
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×1

Minifigures 4 figures

  • Chess Piece - Crown - Pawn Minifigure, checked as a whole figure ×1
  • Skeleton, Red Eyes, Black Minifigure, checked as a whole figure ×1
  • Skeleton, Red Eyes, Speckle Black-Silver Helmet Minifigure, checked as a whole figure ×1
  • Knight, Dark Blue, Helmet, Angry 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.

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