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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.

General Grievous

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10186 General Grievous

1,085 pieces in 167 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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 162 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 Also in Dark Bluish Gray ×8
  • Plate 2 x 2 Black Part 3022 Element 302226 Also in Dark Bluish Gray ×4
  • Plate 2 x 3 Black Part 3021 Element 302126 Also in Dark Bluish Gray ×6
  • Plate 2 x 4 Black Part 3020 Element 302026 ×13
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×2
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×6
  • Plate 4 x 8 Black Part 3035 Element 303526 ×4
  • Plate 6 x 10 Black Part 3033 Element 303326 ×4
  • Plate 6 x 12 Black Part 3028 Element 302826 ×1
  • Plate 6 x 6 Black Part 3958 Element 395826 ×4
  • Plate 8 x 8 Black Part 41539 Element 4166619 ×2
  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×29
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 ×4
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 Also in Black ×3
  • Plate 1 x 6 Dark Bluish Gray Part 3666 Element 4211056 ×17
  • Plate 1 x 8 Dark Bluish Gray Part 3460 Element 4210998 ×2
  • Plate 2 x 10 Dark Bluish Gray Part 3832 Element 4210678 ×4
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 Also in Black ×8
  • Plate 2 x 2 Corner Dark Bluish Gray Part 2420 Element 4210635 ×2
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 Also in Black ×7
  • Plate 1 x 1 Dark Red Part 3024 Element 4539114 or 4183901 ×4
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 ×5
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×6
  • Plate 1 x 3 White Part 3623 Element 6552105 or 6550144 ×1
  • Plate 2 x 16 White Part 4282 Element 6609534 or 4119227 ×5
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×7

Tiles 127 pieces

  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 Also in Dark Bluish Gray ×20
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 Also in Dark Bluish Gray ×15
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×64
  • Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 2 spares in the box ×2
  • Tile 1 x 2 with Groove Dark Bluish Gray Part 3069b Element 4211052 ×10
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 Also in Black ×4
  • Tile 1 x 8 with Groove Dark Bluish Gray Part 4162 Element 5210651 or 4211008 Also in Black ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×6
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×4

Technic Pins 91 pieces

  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×8
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×18
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×4
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 3 spares in the box ×51
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×4
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 2 spares in the box ×4

Bricks Curved 85 pieces

  • Brick Curved 1 x 4 x 1 1/3 No Studs, Lowered Inside Support Black Part 6191 Element 4200031 ×20
  • Brick Arch 1 x 3 x 2 Curved Top Dark Bluish Gray Part 6005 Element 4618881 or 4586564 ×6
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Dark Bluish Gray Part 6091 Element 6411327 or 4210797 ×10
  • Brick Curved 3 x 1 No Studs Dark Bluish Gray Part 50950 Element 4246896 ×14
  • Brick Curved 6 x 1 Dark Bluish Gray Part 42022 Element 6058858 or 4210778 ×4
  • Brick Arch 8 x 1 x 1 2/3 Curved White Part 50967 Element 4588265 or 4519675 ×2
  • Brick Curved 1 x 3 x 2 White Part 33243 Element 4141668 or 4128644 ×3
  • Brick Curved 2 x 2 with Lip, No Studs White Part 30602 Element 4195869 ×5
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End White Part 47457 Element 4494474 ×4
  • Brick Curved 3 x 1 No Studs White Part 50950 Element 6548268 or 4249112 ×17

Bricks Round and Cones 82 pieces

  • Brick Round 1 x 1 Open Stud Dark Bluish Gray Part 3062b Element 4211090 ×4
  • Brick Round 1 x 1 with Fins, Open Stud Dark Bluish Gray Part 4588 Element 6331222 or 6321195 ×2
  • Cone 1 x 1 [No Top Groove] Dark Bluish Gray Part 4589 Element 4518486 or 4210647 ×8
  • Brick Round 1 x 1 Open Stud Trans-Dark Blue Part 3062b Element 6514233 or 6238044 ×32
  • Cone 1 x 1 [No Top Groove] Trans-Dark Blue Part 4589 Element 618843 ×2
  • Brick Round 1 x 1 Open Stud Trans-Neon Green Part 3062b Element 6514237 or 6238675 ×32
  • Cone 1 x 1 [No Top Groove] Trans-Neon Green Part 4589 Element 618849 or 458949 ×2

Technic Axles 72 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×51
  • Technic Axle 4 Black Part 3705 Element 370526 ×7
  • Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×4
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×7
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2

Technic Bricks 58 pieces

  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×9
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Black Part 32064b ×15
  • Technic Brick 1 x 1 with Pin Hole Dark Bluish Gray Part 6541 Element 4210639 ×18
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] Dark Bluish Gray Part 3894 Element 4210917 or 3894199 ×2
  • Technic Brick 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 32324 Element 4211640 ×1
  • Technic Brick 1 x 1 with Pin Hole White Part 6541 Element 6609542 or 654101 ×5

Bricks Sloped 57 pieces

  • Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Black Part 3048c Element 304826 ×6
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 2 spares in the box ×26
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×4
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Light Bluish Gray Part 3747b Element 4211570 ×8
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 1 spare in the box ×13

Technic Connectors 50 pieces

  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×9
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Dark Bluish Gray Part 32174 Element 4217829 ×1
  • Technic Axle and Pin Connector Angled #4 - 135° Dark Bluish Gray Part 32192 Element 6262899 or 4210688 ×8
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×4
  • Technic Axle and Pin Connector Perpendicular Double Split Dark Bluish Gray Part 41678 Element 4234599 ×6
  • Technic Axle and Pin Connector Angled #2 - 180° Light Bluish Gray Part 32034 Element 6346487 or 4211567 ×4
  • Technic Pin Connector Plate with One Hole (Single on Bottom) Light Bluish Gray Part 32529 Element 4211828 or 4162945 ×10
  • Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×4
  • Technic Pin Connector Round [Slotted] White Part 62462 Element 6550164 or 6173116 ×2

Plates Round Curved and Dishes 47 pieces

  • Plate Round 1 x 1 with Solid Stud Dark Bluish Gray Part 6141 Element 4210633 1 spare in the box ×25
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×2
  • Plate Round 4 x 4 with Pin Hole Light Bluish Gray Part 60474 Element 4515351 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 2 spares in the box ×4
  • Dish 2 x 2 Inverted [Radar] White Part 4740 Element 6601845 or 474001 ×2
  • Dish 4 x 4 Inverted [Radar] White Part 3960 Element 396001 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×5
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×6

Plates Special 36 pieces

  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×4
  • Plate Special 4 x 6, Studs on 3 Edges Black Part 6180 Element 4100378 or 618026 ×4
  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×5
  • Plate Special 1 x 2 Side Handle [Free Ends] Dark Bluish Gray Part 2540 Element 4210660 ×4
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Dark Bluish Gray Part 2444 Element 4196768 ×8
  • Technic Plate 2 x 4 [3 Holes] Dark Bluish Gray Part 3709 Element 4227398 ×4
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×4
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] White Part 4085c Element 408501 ×1

Bricks Special 33 pieces

  • Brick Special 1 x 1 with Studs on 2 Sides Black Part 47905 Element 4214559 ×7
  • Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×4
  • Brick Special 1 x 1 Studs on 4 Sides Dark Bluish Gray Part 4733 Element 4210700 ×6
  • Brick Special 1 x 1 with Headlight Dark Bluish Gray Part 4070 Element 4211044 ×5
  • Brick Special 1 x 4 with 4 Studs on One Side Light Bluish Gray Part 30414 Element 4211636 ×4
  • Brick Special 1 x 1 Studs on 4 Sides White Part 4733 Element 4111971 or 473301 ×3
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×4

Hinges, Arms and Turntables 29 pieces

  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Black Part 44567a Element 4185620 ×4
  • Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×1
  • Hinge Brick 1 x 2 Base Dark Bluish Gray Part 3937 Element 4211066 ×3
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Dark Bluish Gray Part 44302a Element 4210884 ×2
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Dark Bluish Gray Part 73983 Element 6102774 or 4271344 ×4
  • Hinge Brick 1 x 6 Locking with 1 Finger Vertical End and 2 Fingers Vertical End, 9 Teeth Light Bluish Gray Part 30388 Element 4211696 ×8
  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×3
  • Hinge Plate 1 x 12 Locking with Angled Side Extensions and Tapered Ends, 7 Teeth White Part 57906 Element 6423003 or 4503479 ×4

Technic Beams 29 pieces

  • Technic Beam 1 x 2 Thin Dark Bluish Gray Part 41677 Element 6338422 or 4210980 ×10
  • Technic Beam 1 x 3 Thick Dark Bluish Gray Part 32523 Element 32523199 or 4210751 ×2
  • Technic Beam 1 x 4 Thin Dark Bluish Gray Part 32449 Element 6327561 or 4210749 ×9
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Dark Bluish Gray Part 6629 Element 6279883 or 4210638 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Dark Bluish Gray Part 32271 Element 6276837 or 4281516 ×4
  • Technic Beam 1 x 9 Thick Dark Bluish Gray Part 40490 Element 4645730 or 4210757 ×2

Plates Wedged 22 pieces

  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×4
  • Wedge Plate 8 x 8 Cut Corner Black Part 30504 Element 4205347 ×4
  • Wedge Plate 3 x 2 Left White Part 43723 Element 6552121 or 4179875 ×6
  • Wedge Plate 3 x 2 Right White Part 43722 Element 6552120 or 4179874 ×6
  • Wedge Plate 4 x 2 Left White Part 41770 Element 6552119 or 4161326 ×1
  • Wedge Plate 4 x 2 Right White Part 41769 Element 6552118 or 4160857 ×1

Bricks Wedged 21 pieces

  • Brick Wedged, Curved 6 x 2 Left, Inner Ridges Dark Bluish Gray Part 41748 Element 6063681 or 4210772 ×1
  • Brick Wedged, Curved 6 x 2 Right, Inner Ridges Dark Bluish Gray Part 41747 Element 6063685 or 4210771 ×1
  • Brick Wedged, Curved 6 x 2 Left, Inner Ridges White Part 41748 Element 6552117 or 4160124 ×3
  • Brick Wedged, Curved 6 x 2 Right, Inner Ridges White Part 41747 Element 4160101 ×3
  • Brick Wedged, Curved 6 x 4 Triple White Part 43712 Element 4179869 ×4
  • Brick Wedged, Curved 8 x 3 x 2 Open Left White Part 41750 Element 6312345 or 6038751 ×1
  • Brick Wedged, Curved 8 x 3 x 2 Open Right White Part 41749 Element 6312346 or 6038641 ×1
  • Brick Wedged, Sloped 4 x 2 Triple Left White Part 43710 Element 6552155 or 6106685 ×3
  • Brick Wedged, Sloped 4 x 2 Triple Right White Part 43711 Element 6552154 or 6106683 ×3
  • Brick Wedged, Sloped 4 x 4 Triple, Stud Notches White Part 48933 Element 6299775 or 4264026 ×1

Animal / Creature Body Parts 12 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small White Part 53451 Element 6270106 or 4568387 2 spares in the box ×12

Bricks 12 pieces

  • Brick 2 x 2 Corner Black Part 2357 Element 235776 or 235726 ×4
  • Brick 2 x 4 Black Part 3001 Element 300126 ×8

Minifig Upper Body 12 pieces

  • Arm Mechanical with Clip [Thin Support] White Part 53989 Element 4622904 or 4296948 ×12

Tiles Special 9 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Dark Bluish Gray Part 2555 Element 6031420 or 4211069 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×5

Tubes and Hoses 7 pieces

  • Hose, Ribbed 7mm D. 10L / 8.0cm Black Part 78c10 Element 4523639 or 4287632 ×2
  • Hose, Ribbed 7mm D. 12L / 9.6cm Black Part 78c12 Element 6506605 or 6253280 ×1
  • Hose Rigid 3mm D. 22L / 17.6cm White Part 75c22 Element 6434175 or 6365707 ×4

Pneumatics 5 pieces

  • Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 3 spares in the box ×5

Technic Beams Special 5 pieces

  • Technic Beam 1 x 2 with Ball Joint Angled Dark Bluish Gray Part 50923 Element 4503381 or 4289258 ×1
  • Technic Rotation Joint Disk with Pin Hole and 3L Beam Thick Dark Bluish Gray Part 44224 Element 4182751 ×2
  • Technic Rotation Joint Disk with Pin and 3L Beam Thick Light Bluish Gray Part 44225 Element 6671155 or 6332151 ×2

Bars, Ladders and Fences 4 pieces

  • Bar 1L with Clip Dark Bluish Gray Part 48729a Element 4222196 2 spares in the box ×4

Minifig Accessories 4 pieces

  • Tap 1 x 1 with Hole in Spout Black Part 4599a ×4

Minifig Shields, Weapons, & Tools 4 pieces

  • Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×4

Technic Bushes 4 pieces

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

Plants & Trees 2 pieces

  • Plant / Creature Body Part, Vine / Tail / Tentacle / Bionicle Spine, Spiky Dark Red Part 55236 Element 4541488 or 4294145 ×2

Minifig Heads 1 piece

  • Minifig Head [Plain] [Blocked Open Stud] Reddish Brown Part 3626b ×1

Minifig Headwear 1 piece

  • Hood, Connected Chin Reddish Brown Part 30381 Element 4655372 or 4277666 ×1

Stickers 1 piece

  • Sticker Sheet for Set 10186-1 [No Color/Any Color] Part 62621 Element 4524038 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 6 x 6 x 3 Canopy Half Sphere with Dual 2 Fingers Trans-Neon Green Part 50747 Element 4500929 ×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

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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.

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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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