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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.

Hydraxon

Checking

8923 Hydraxon

165 pieces in 55 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

Technic Connectors 36 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×3
  • Technic Axle Connector 2 x 3 with Ball Socket and Axle Socket with Light Bluish Gray Rubber Insert Black Part 47326pat0003 Element 4235786 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Black Part 32174 Element 4119328 ×11
  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×3
  • Technic Axle and Pin Connector Angled #4 - 135° Black Part 32192 Element 6262897 or 4121610 ×1
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×2
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×2
  • Technic Axle and Pin Connector Perpendicular Double Split Black Part 41678 Element 4162857 ×2
  • Technic Axle and Pin Connector 2 x 7 with Two Ball Joint Sockets Dark Bluish Gray Part 50898 Element 4242036 ×2
  • Technic Axle Connector Hub with 3 Axles at 120° Light Bluish Gray Part 57585 Element 4502595 ×1
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×1
  • Technic Axle and Pin Connector, Perpendicular with Extension Pearl Light Gray Part 53586 Element 4494486 or 4286268 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° White Part 32014 Element 6450588 or 6268926 ×1

Technic Pins 35 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×6
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×6
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×19
  • Technic Pin 3/4 Dark Bluish Gray Part 32002 Element 32002199 or 4211050 1 spare in the box ×2
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×2

Large Buildable Figures 23 pieces

  • Large Figure Foot, Piraka Mechanical Black Part 53568 Element 4284574 ×2
  • Large Figure Foot, Toa Inika Elliptical Black Part 53549 Element 4292528 ×2
  • Large Figure Skeletal, Limb, with 2 Ball Joints, and 3 Holes (Rahkshi) Black Part 45749 Element 4294582 or 4227596 ×2
  • Large Figure Skeletal, Limb, with 2 Ball Joints, and 3 Holes (Vahki) Black Part 47328 Element 4289376 or 4224135 ×2
  • Large Figure Skeletal, Torso with Beam, 2 Ball Joints, and 7 Tooth Half Gear Black Part 47306 Element 4278585 or 4218521 ×1
  • Large Figure Skeletal, Torso, Upper, with 2 Ball Joints (Toa Inika) Black Part 53545 Element 4292590 ×1
  • Large Figure Head Connector Block (Toa Metru) Dark Bluish Gray Part 47312 Element 4278473 or 4217832 ×1
  • Large Figure Foot, Piraka Mechanical Pearl Light Gray Part 53568 Element 4296786 or 4276534 ×1
  • Large Figure Limb Cover / Back Plate (Hydruka) Pearl Light Gray Part 59577 Element 4505846 ×2
  • Large Figure Mask Hydraxon Pearl Light Gray Part 57575 Element 4506530 ×1
  • Large Figure Weapon Blade (Hewkii Mahri / Solek) Pearl Light Gray Part 57543 Element 4505635 or 4504970 ×2
  • Large Figure Weapon Blade, Mahri Matoran Pearl Light Gray Part 57563 Element 4497138 ×2
  • Large Figure Weapon Blade, Shark Tooth Pearl Light Gray Part 57567 Element 4506662 ×1
  • Large Figure Weapon Claw Blade, Small Pearl Light Gray Part 57528 Element 4504538 ×2
  • Large Figure Head Connector Block Eye/Brain Stalk (Toa Metru) Trans-Neon Green Part 47313 Element 4238920 or 4218955 ×1

Technic Axles 17 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 6 Black Part 3706 Element 370626 ×1
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×8
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×3

Projectiles / Launchers 10 pieces

  • Launcher, Large Figure Weapon Cannon, Cordak Blaster Pearl Light Gray Part 57523c01 Element 4544505 or 4504505 ×1
  • Projectile, Large Figure Weapon, Ammo (Cordak) Red Part 57525 Element 4497796 ×9

Technic Beams 10 pieces

  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×2
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×1
  • Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin Black Part 32249 Element 6336619 or 4505842 ×4
  • Technic Beam 1 x 2 Thin Dark Bluish Gray Part 41677 Element 6338422 or 4210980 ×1
  • Technic Beam 1 x 3 Thin Dark Bluish Gray Part 6632 Element 6632199 or 6364452 ×2

Animal / Creature Body Parts 8 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Pearl Light Gray Part 53451 Element 4568390 or 4494086 1 spare in the box ×8

Minifig Upper Body 8 pieces

  • Arm Mechanical with Clip [Thin Support] Pearl Dark Gray Part 53989 Element 4294997 ×8

Pneumatics 6 pieces

  • Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 1 spare in the box ×6

Tubes and Hoses 6 pieces

  • Flexible Ribbed Hose 8mm Ends 19L Pearl Light Gray Part 57539 Element 4561465 or 4506460 ×2
  • Hose, Ribbed 7mm D. 7L / 5.6cm Pearl Light Gray Part 78c07 Element 4495203 or 4141522 ×4

Technic Special 4 pieces

  • Technic Ball Joint with Through Axle Hole Black Part 53585 Element 4286267 ×4

Technic Bushes 2 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×2

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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