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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.

Blaster / Blaster Slizer

Checking

8523 Blaster / Blaster Slizer

89 pieces in 29 part and color combinations.

LEGO counts 88 pieces. This inventory comes from a separate parts catalog and lists 89; the two do not always count the same elements, so their totals differ. 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

Technic Connectors 31 pieces

  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Black Part 32174 Element 4119328 ×3
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×2
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×3
  • Technic Block 3 x 6 x 1 & 2/3 Black Part 32165 Element 4130588 or 4119352 ×2
  • Technic Gearbox Half Black Part 32166 Element 4119291 ×2
  • Technic Pin Connector Block 3 x 3 x 1 Dark Gray Part 32172 Element 4142059 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Yellow Part 32174 Element 4120123 ×10
  • Technic Block 3 x 6 x 1 & 2/3 Yellow Part 32165 Element 4130587 or 4128602 ×1
  • Technic Gearbox Half Yellow Part 32166 Element 4119290 ×6

Technic Axles 19 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×5
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×5
  • Technic Axle 5 Black Part 32073 Element 4114740 ×4
  • Technic Axle 6 Black Part 3706 Element 370626 ×1

Technic Pins 16 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×11
  • Technic Axle Towball Light Gray Part 2736 Element 273602 ×5

Large Buildable Figures 9 pieces

  • Large Figure Skeletal, Arm Forked with Flexible Center and Ball Joint Black Part 32168 Element 4119300 ×2
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Black Part 32173 Element 4528179 or 4193779 ×4
  • Large Figure Visor / Limb Cover, Armour with Blaster Mecha / Animal Print Black Part 32169pr0001 Element 4142075 ×1
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Yellow Part 32173 Element 4528082 or 4193775 ×2

Technic Gears 6 pieces

  • Technic Gear 40 Tooth Black Part 3649 Element 4142058 ×1
  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×1
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×4

Technic Panels 3 pieces

  • Technic Panel Fairing # 1 Large Short, Large Holes, Side A Black Part 32190 Element 4121673 ×1
  • Technic Panel Fairing # 2 Large Short, Large Holes, Side B Black Part 32191 Element 4121674 ×2

Projectiles / Launchers 2 pieces

  • Large Figure Throwing Disk, Blaster, 6 Pips, Blaster and 2 Bots with Fire Background Print Black Part 32171pr0059 Element 4142071 ×1
  • Large Figure Throwing Disk, Blaster, 7 Pips, Blaster Running Print Yellow Part 32171pr0060 Element 4142072 ×1

Tubes and Hoses 2 pieces

  • Hose, Ribbed 7mm D. 2L / 1.6cm Pearl Light Gray Part 78c02 Element 4495192 or 4275384 ×2

String, Bands and Reels 1 piece

  • Rubber Band Small 13mm (Square Cross Section) Black Part 71509 Element 4141606 or 4107153 ×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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