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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.

Nitro Muscle

Checking

8146 Nitro Muscle

598 pieces in 94 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 Pins 235 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×71
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×107
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×35
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×10
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×12

Technic Beams 122 pieces

  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×6
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×4
  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×4
  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×2
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×3
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×1
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×12
  • Technic Beam 1 x 15 Thick Dark Bluish Gray Part 32278 Element 32278199 or 4542576 ×6
  • Technic Beam Triangle Thin [Type I] Dark Bluish Gray Part 2905 Element 4210689 ×4
  • Technic Beam 1 x 11 Thick Red Part 32525 Element 4562805 or 4534913 ×7
  • Technic Beam 1 x 3 Thick Red Part 32523 Element 4153718 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Red Part 32348 Element 6332236 or 6278130 ×7
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Red Part 32271 Element 6276845 or 6188299 ×4
  • Technic Beam 1 x 11.5 Double Bent Thick Yellow Part 32009 Element 6271150 or 6257104 ×10
  • Technic Beam 1 x 15 Thick Yellow Part 32278 Element 4542579 or 4237445 ×10
  • Technic Beam 1 x 5 Thick Yellow Part 32316 Element 4142133 or 4128590 ×8
  • Technic Beam 1 x 7 Thick Yellow Part 32524 Element 4495934 or 4187082 ×3
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Yellow Part 32271 Element 6276838 or 4544005 ×2
  • Technic Beam 1 x 9 Thick Yellow Part 40490 Element 6115616 or 4187136 ×4
  • Technic Beam 3 x 5 L-Shape Thick Yellow Part 32526 Element 4144022 ×21

Technic Connectors 74 pieces

  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×3
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×2
  • Technic Axle and Pin Connector Angled #4 - 135° Black Part 32192 Element 6262897 or 4121610 ×7
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×4
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Black Part 32068 Element 6273318 or 4114670 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Dark Bluish Gray Part 32014 Element 6268923 or 4210671 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Bluish Gray Part 6538b Element 4211543 ×2
  • Technic Axle and Pin Connector Angled #1 Light Bluish Gray Part 32013 Element 6296859 or 4211550 ×2
  • Technic Axle and Pin Connector Perpendicular Double Split Light Bluish Gray Part 41678 Element 4211889 ×5
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Red Part 32016 Element 6261396 or 6176754 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Red Part 32014 Element 6268922 or 4189131 ×2
  • Technic Axle and Pin Connector Perpendicular Double Red Part 32291 Element 6280393 or 4241474 ×5
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole White Part 32184 Element 6276981 or 6114940 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Yellow Part 6538b Element 4140507 ×4
  • Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×6
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Yellow Part 42003 Element 6273711 or 4200324 ×14
  • Technic Pin Connector Perpendicular Long Yellow Part 32557 Element 6004450 or 4501535 ×8

Technic Axles 61 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×3
  • Technic Axle 4 Black Part 3705 Element 370526 ×10
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×10
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×5
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×6
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×5
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×22

Panels 20 pieces

  • Panel 1 x 1 x 1 Corner Yellow Part 6231 Element 4201587 or 4113238 ×20

Technic Bushes 12 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×2
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 ×10

Wheels and Tyres 11 pieces

  • Tyre 68.8 x 36 ZR Black Part 44771 Element 6062225 or 4614801 ×2
  • Tyre 81.6 x 36 R Black Part 56907 Element 6241908 or 6022941 ×2
  • Wheel 56 x 34 Technic Racing Medium with 3 Pin Holes Black Part 44772 Element 6005203 or 4262086 ×4
  • Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes Light Bluish Gray Part 55982 Element 4490127 ×2
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Light Bluish Gray Part 56145 Element 4297210 ×1

Technic Panels 10 pieces

  • Technic Panel Fairing # 7 Small Long, Large Hole, Side A Red Part 32534 Element 4193846 ×1
  • Technic Panel Fairing # 8 Small Long, Large Hole, Side B Red Part 32535 Element 4193845 or 4158886 ×1
  • Technic Panel Fairing #20 Large Long, Small Hole, Side A Red Part 44350 Element 4277117 or 4205036 ×3
  • Technic Panel Fairing #21 Large Long, Small Hole, Side B Red Part 44351 Element 4277095 or 4205039 ×3
  • Technic Panel Fairing #22 Large Short, Small Hole, Side A Red Part 44352 Element 4276978 or 4205040 ×1
  • Technic Panel Fairing #23 Large Short, Small Hole, Side B Red Part 44353 Element 4277113 or 4205041 ×1

Tubes and Hoses 8 pieces

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×2
  • Hose, Ribbed 7mm D. 11L / 8.8cm Pearl Light Gray Part 78c11 Element 4495208 or 4141672 ×2
  • Axle Hose, Soft 19L Red Part 32235 Element 4614802 or 4227553 ×4

Plates 7 pieces

  • Plate 4 x 6 Black Part 3032 Element 303226 ×2
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×1
  • Plate 1 x 4 Red Part 3710 Element 371021 ×1
  • Plate 1 x 10 Yellow Part 4477 Element 6079138 or 6078095 ×1
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×1
  • Plate 2 x 8 Yellow Part 3034 Element 303424 ×1

Bricks Round and Cones 6 pieces

  • Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder White Part 30367b ×2
  • Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×4

Plates Round Curved and Dishes 6 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×4
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Clear Part 2654 Element 6581772 or 6163901 ×2

Technic Steering, Suspension and Engine 6 pieces

  • Technic Steering Arm 6.5 x 2 with Towball Socket Rounded, Chamfered Black Part 32195b Element 4204025 ×1
  • Technic Steering Arm with 2 Pins Black Part 32069 Element 6278276 or 4114671 ×2
  • Technic Steering Wheel Pilot's Yoke [Open Stud, Axle Hole with X Opening] Dark Bluish Gray Part 40001 Element 6023800 or 4210710 ×1
  • Technic Engine Tunable, Block with Trapezoidal Air Scoop Pearl Light Gray Part 46453 Element 4494989 or 4297957 ×2

Bricks 4 pieces

  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 8 Red Part 3008 Element 300821 ×1

Technic Special 4 pieces

  • Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Red Part 41669 Element 4163567 ×4

Tiles 4 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×2

Technic Gears 3 pieces

  • Technic Gear 8 Tooth Light Bluish Gray Part 3647 Element 4211432 or 3647194 1 spare in the box ×2
  • Technic Gear Rack 1 x 4 Light Bluish Gray Part 3743 Element 6457283 or 4211450 ×1

Minifig Accessories 2 pieces

  • Tap 1 x 1 with Hole in Spout Red Part 4599a ×2

Bricks Special 1 piece

  • Brick Special 1 x 4 with 4 Studs on One Side Black Part 30414 Element 4162443 ×1

Bricks Wedged 1 piece

  • Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 Studs Yellow Part 52031 Element 4263142 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8146-1 [No Color/Any Color] Part 57861 Element 4496163 ×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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