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The Workshop Sheet 10 of 21

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.

Ultrarex (8504 + 8505 + 8506 + 8507)

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C8504 Ultrarex (8504 + 8505 + 8506 + 8507)

88 pieces in 34 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.

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Piece checklist

Black 38 pieces

  • Large Figure Skeletal, Arm Forked with Flexible Center and Ball Joint Black Part 32168 Element 4119300 ×1
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Black Part 32173 Element 4528179 or 4193779 ×4
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×6
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 5 Black Part 32073 Element 4114740 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Black Part 32174 Element 4119328 ×4
  • Technic Beam 1 x 7 with Fan Black Part 32177 Element 4586837 or 4260659 ×2
  • Technic Block 3 x 6 x 1 & 2/3 Black Part 32165 Element 4130588 or 4119352 ×2
  • Technic Gear 8 Tooth Black Part 3647 Element 4120181 ×2
  • Technic Pin Connector Block 3 x 3 x 1 Black Part 32172 Element 4119317 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×6
  • Technic Rectangular Gearbox Half Black Part 32167 Element 4119353 ×2
  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×1

Light Gray 11 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 ×10

Purple 9 pieces

  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Purple Part 32174 Element 4119327 ×5
  • Technic Gear 8 Tooth Purple Part 3647 Element 4120122 ×2
  • Technic Gear Rack Double with Ball Joint Purple Part 32170 Element 4120258 ×1
  • Technic Pin Connector Block 3 x 3 x 1 Purple Part 32172 Element 4119314 ×1

Dark Gray 8 pieces

  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Dark Gray Part 32173 Element 4289780 or 4199475 ×4
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×4

Dark Turquoise 7 pieces

  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Dark Turquoise Part 32174 Element 4119330 ×5
  • Technic Pin Connector Block 3 x 3 x 1 Dark Turquoise Part 32172 Element 4119316 ×2

Tan 6 pieces

  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Tan Part 32174 Element 4119329 ×4
  • Technic Gear 8 Tooth Tan Part 3647 Element 4120154 ×1
  • Technic Pin Connector Block 3 x 3 x 1 Tan Part 32172 Element 4119315 ×1

Yellow 5 pieces

  • Large Figure Skeletal, Arm Forked with Flexible Center and Ball Joint Yellow Part 32168 Element 4119296 ×2
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Yellow Part 32173 Element 4528082 or 4193775 ×2
  • Large Figure Visor / Limb Cover, Armour with Jet / Judge Print Yellow Part 32169pr0007 Element 4119584 ×1

Green 3 pieces

  • Technic Gear 40 Tooth Green Part 3649 Element 4120109 ×1
  • Technic Gearbox Half Green Part 32166 Element 4119365 ×2

Trans-Brown 1 piece

  • Large Figure Visor / Limb Cover, Armour [Plain] Trans-Brown Part 32169 Element 4120239 ×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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