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.

Corroder

Checking

7156 Corroder

40 pieces in 21 part and color combinations.

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

Black 14 pieces

  • Large Figure Foot, Claw with Ball Socket (Shadow Matoran) Black Part 60902 Element 4516407 ×2
  • Large Figure Shield, Type 1 Black Part 87820 Element 4614400 or 4581828 ×3
  • Large Figure Skeletal, Limb, Angular with Ball Joint and Ball Socket (Av-Matoran) Black Part 60896 Element 4526578 ×2
  • Large Figure Skeletal, Limb, with 2 Ball Sockets Black Part 87839 Element 4566781 ×2
  • Large Figure Skeletal, Torso, Angular with Ball Joints Black Part 87794 Element 4578958 ×1
  • Launcher, Large Figure Weapon, Zamor Sphere Launcher, with Hole and Axle Hole Black Part 64275 Element 4581740 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Closed Sides, Squared Ends Black Part 60176 Element 4519244 ×2

Light Bluish Gray 10 pieces

  • Technic Axle Connector Hub with 3 Axles at 120° Light Bluish Gray Part 57585 Element 4502595 ×6
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Bluish Gray Part 32015 Element 6271347 or 4211551 ×1
  • Technic Axle and Pin Connector Perpendicular Double Split Light Bluish Gray Part 41678 Element 4211889 ×1
  • Technic Beam 1 x 4 Thin with Stud Connector Light Bluish Gray Part 2825 Element 6331574 or 4211561 ×1
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes] Light Bluish Gray Part 87082 Element 4560175 ×1

Lime 9 pieces

  • Large Figure Mask, Corroder Lime Part 87823 Element 4579141 ×1
  • Large Figure Skeletal, Limb, with 2 Ball Joints (Toa Metru) Lime Part 47297 Element 4548164 or 4503162 ×2
  • Large Figure Weapon Claw, Corroder Lime Part 87827 Element 4579142 ×6

Dark Bluish Gray 2 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Pin 3/4 Dark Bluish Gray Part 32002 Element 32002199 or 4211050 1 spare in the box ×1

Red 2 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×2

Bright Green 1 piece

  • Projectile, Large Figure Weapon, Zamor Sphere / Ball with Marbled Trans-Bright Green Pattern Bright Green Part 54821pat0002 Element 4296080 ×1

Trans-Neon Orange 1 piece

  • Large Figure Head Connector Block (Glatorian) Trans-Neon Orange Part 64262 Element 4543426 or 4540702 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 7156-1 [No Color/Any Color] Part 90065 Element 4582477 ×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.