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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.

The Boss

Checking

8516 The Boss

122 pieces in 37 part and color combinations.

LEGO counts 125 pieces. This inventory comes from a separate parts catalog and lists 122; 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

Black 72 pieces

  • Large Figure Visor / Limb Cover, Armour with The Boss Print Black Part 32169pr0005 Element 4143455 ×1
  • Rubber Band Large [Square Cross Section] Black Part 70158 2 spares in the box ×2
  • Rubber Band Medium (Square Cross Section) Thin Cut Black Part 70012 Element 70012 1 spare in the box ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×7
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×4
  • Technic Axle 4 Black Part 3705 Element 370526 ×5
  • Technic Axle 6 Black Part 3706 Element 370626 ×5
  • Technic Axle 8 Black Part 3707 Element 370726 ×3
  • Technic Axle Connector Block 3 x 6 with 6 Axleholes Black Part 32307 Element 4236019 or 4140422 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×3
  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×2
  • Technic Beam 1 x 5 Thin Black Part 32017 Element 6114935 or 4503423 ×3
  • Technic Beam 1 x 7 with Fan Black Part 32177 Element 4586837 or 4260659 ×4
  • Technic Block 3 x 6 x 1 & 2/3 Black Part 32165 Element 4130588 or 4119352 ×1
  • Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×3
  • Technic Panel Fairing # 5 Small Short, Large Hole, Side A Black Part 32527 Element 4143417 ×3
  • Technic Panel Fairing # 6 Small Short, Large Hole, Side B Black Part 32528 Element 4143419 ×3
  • Technic Pin Double with Axle Hole Black Part 32138 Element 4130597 or 4119589 ×4
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×6
  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×3
  • Tyre 49.6 x 28 VR Black Part 6594 Element 75778 ×3

Dark Gray 21 pieces

  • Technic Axle and Pin Connector Perpendicular Dark Gray Part 6536 Element 4173659 or 4141206 ×2
  • Technic Axle and Pin Connector Perpendicular Double Dark Gray Part 32291 Element 4140475 or 4130189 ×4
  • Technic Beam 1 x 3 Thin Dark Gray Part 6632 Element 4141184 or 4130187 ×6
  • Technic Block 3 x 5 x 1 2/3 with RoboRider The Boss Print Dark Gray Part 32310pr0004 Element 4143453 ×3
  • Technic Pin Connector Block 7 x 3 Dark Gray Part 32305 Element 4140438 or 4130190 ×3
  • Wheel 49.6 x 28 VR (36.8 x 26) with Axle Hole Dark Gray Part 6595 Element 4179490 or 4141310 ×3

Light Gray 19 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×7
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×7
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×5

Orange 9 pieces

  • Technic Arm 1 x 7 x 3 with Gear Ends Orange Part 32311 Element 4143440 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Orange Part 6538b Element 4252469 or 4140324 ×3
  • Technic Driving Ring Extension, 4 Ridges Orange Part 32187 Element 4143439 ×2
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Orange Part 3648b Element 4143436 or 3648106 ×1
  • Technic Wheel Holder 7 x 3 Orange Part 32306 Element 4143438 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 8516-1 [No Color/Any Color] Part 23423 Element 4143435 ×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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