BlockTalk Find Your Set

The Workshop Sheet 10 of 22

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Robotops (8500 + 8501 + 8502 + 8503)

Checking

C8500 Robotops (8500 + 8501 + 8502 + 8503)

96 pieces in 38 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

Technic Connectors 32 pieces

  • Technic Gearbox Half Black Part 32166 Element 4119291 ×4
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Blue Part 32174 Element 4120106 ×3
  • Technic Gearbox Half Blue Part 32166 Element 4119292 ×2
  • Technic Block 3 x 6 x 1 & 2/3 Dark Turquoise Part 32165 Element 4130593 or 4119287 ×1
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Medium Blue Part 32174 Element 4257225 or 4119332 ×7
  • Technic Block 3 x 6 x 1 & 2/3 Medium Blue Part 32165 Element 4130590 or 4119289 ×2
  • Technic Pin Connector Block 3 x 3 x 1 Medium Blue Part 32172 Element 4119319 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Red Part 32174 Element 4119331 ×4
  • Technic Block 3 x 6 x 1 & 2/3 Red Part 32165 Element 4130586 or 4119288 ×1
  • Technic Pin Connector Block 3 x 3 x 1 Red Part 32172 Element 4119318 ×2
  • Technic Gearbox Half White Part 32166 Element 4119293 ×2
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Yellow Part 6553 Element 655324 ×2

Technic Axles 19 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×6
  • Technic Axle 4 Black Part 3705 Element 370526 ×3
  • Technic Axle 5 Black Part 32073 Element 4114740 ×4
  • Technic Axle 6 Black Part 3706 Element 370626 ×6

Technic Gears 12 pieces

  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Blue Part 3648b Element 4120110 ×1
  • Technic Gear 8 Tooth Blue Part 3647 Element 4120103 ×2
  • Technic Worm Gear Blue Part 4716 Element 4120180 ×1
  • Technic Gear 40 Tooth Red Part 3649 Element 4120108 ×1
  • Technic Gear 8 Tooth Rust Part 3647 ×1
  • Technic Worm Gear Rust Part 4716 ×1
  • Technic Gear 40 Tooth White Part 3649 Element 4120107 ×1
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Yellow Part 3648b Element 4195172 or 4120163 ×1
  • Technic Gear 8 Tooth Yellow Part 3647 Element 4120104 ×1
  • Technic Worm Gear Yellow Part 4716 Element 4120101 ×2

Technic Pins 12 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×6
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Dark Turquoise Part 32054 Element 4140804 or 4120240 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×4

Large Buildable Figures 10 pieces

  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Black Part 32173 Element 4528179 or 4193779 ×3
  • Large Figure Skeletal, Arm Forked with Flexible Center and Ball Joint Blue Part 32168 Element 4119301 ×1
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Blue Part 32173 Element 4119325 ×3
  • Large Figure Skeletal, Arm Forked with Flexible Center and Ball Joint Dark Turquoise Part 32168 Element 4119299 ×1
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints White Part 32173 Element 4120124 ×2

Technic Bushes 8 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×1
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×7

Energy Effects 2 pieces

  • Wave / Flame Rounded with Base Pegs Trans-Neon Orange Part 6126a ×2

Minifig Shields, Weapons, & Tools 1 piece

  • Weapon Spear Gun with Rounded Trigger and Thin Spear Base Yellow Part 30088 Element 4106936 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy