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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.

Boulder Blaster

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71736 Boulder Blaster

431 pieces in 158 part and color combinations, plus 4 minifigures.

The official piece count includes the 19 parts inside the set's minifigures, which this inventory lists separately; the remaining difference of 1 piece is within the tolerance of the catalog data.

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

Black 122 pieces

  • Axle Hose, Soft 12L Black Part 32200 Element 4501290 or 4121647 ×1
  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Black Part 6020 Element 602026 ×1
  • Brick 1 x 3 Black Part 3622 Element 362226 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 ×6
  • Brick Curved 2 x 2 x 2/3 Black Part 15068 Element 6053077 ×3
  • Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Black Part 11153 Element 6580394 or 6037746 ×4
  • Brick Curved 4 x 3 with 3 Layers, 1 x 3 Cutout on Underside Black Part 66955 Element 6301371 ×2
  • Brick Curved 5 x 8 x 2/3, 4 Studs on Top Black Part 15625 Element 6186061 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box ×4
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Black Part 3747b Element 4500458 or 374726 ×1
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×2
  • Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Black Part 4871 Element 4188534 or 487126 ×5
  • Brick Special 1 x 2 with 2 Studs on 1 Side Black Part 11211 Element 6138173 ×1
  • Brick Special 1 x 2 with Grille Black Part 2877 Element 287726 ×2
  • Brick Wedged 3 x 4 [Stud Notches] Black Part 50373 Element 6290416 or 6146307 ×1
  • Flag 2 x 2 Trapezoid with Flat Area between Clips Black Part 44676 Element 4184617 ×2
  • Gearbox 4 x 4 x 1 2/3 with 1 x 2 Cutouts, Pin Holes Black Part 6585 Element 6169982 or 4500902 ×1
  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, without Groove Black Part 44567b Element 6266244 ×2
  • Panel 1 x 2 x 1 [Rounded Corners] Black Part 4865b Element 6146220 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 Also in Dark Bluish Gray ×1
  • Plate 1 x 6 Black Part 3666 Element 366626 ×4
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×2
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×8
  • Plate Special 1 x 2 Side Handle [Free Ends] Black Part 2540 Element 4140588 or 254026 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×8
  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×2
  • Plate Special 2 x 2 with Bar Frame Octagonal, Reinforced, Completely Round Studs Black Part 75937 Element 6018805 ×2
  • Tail Shuttle Black Part 6239 Element 6093011 or 4531192 ×1
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Brick 1 x 12 [11 Pin Holes] Black Part 3895 Element 389526 ×2
  • Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×1
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×2
  • Technic Pin Connector Round [Slotted] Black Part 62462 Element 6173119 or 4526982 ×1
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×3
  • Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Black Part 32124 Element 6280168 or 4114689 ×2
  • Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×1
  • Technic Tread Sprocket Wheel Small 6 Tooth Black Part 57520 Element 4662228 or 4544527 ×2
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1
  • Tile Round 1 x 1 Quarter Black Part 25269 Element 6172383 1 spare in the box ×4
  • Tile Special 2 x 2 Corner with Cut Corner - Facet Black Part 27263 Element 6166859 ×2
  • Tile Special 2 x 3 Pentagonal Black Part 22385 Element 6245251 or 6128992 ×5
  • Wedge Plate 2 x 4 Black Part 51739 Element 4531412 ×2
  • Wedge Plate 3 x 2 Left Black Part 43723 Element 4180536 ×4
  • Wedge Plate 3 x 2 Right Black Part 43722 Element 4180508 ×4
  • Wedge Plate 6 x 3 Left Black Part 54384 Element 4283047 ×3
  • Wedge Plate 6 x 3 Right Black Part 54383 Element 4283046 ×3

Dark Bluish Gray 78 pieces

  • Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×1
  • Bar Holder with Clip Dark Bluish Gray Part 11090 Element 6336970 or 6015890 ×1
  • Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×2
  • Brick Round 1 x 1 Open Stud Dark Bluish Gray Part 3062b Element 4211090 ×3
  • Brick Sloped 18° 4 x 1 Dark Bluish Gray Part 60477 Element 4535930 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 with Green Screens and Controls Print Dark Bluish Gray Part 85984pr0013 Element 6194290 ×1
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×1
  • Brick Special 1 x 4 with 4 Studs on One Side Dark Bluish Gray Part 30414 Element 4210725 ×4
  • Launcher, Brick Special 1 x 4 Spring Shooter with Light Bluish Gray Top Dark Bluish Gray Part 15400 Element 6324200 or 6048898 ×8
  • Plate 1 x 10 Dark Bluish Gray Part 4477 Element 4257526 or 4210816 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×4
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 Also in Black ×16
  • Plate 1 x 8 Dark Bluish Gray Part 3460 Element 4210998 ×2
  • Plate 4 x 6 Dark Bluish Gray Part 3032 Element 4211115 or 3032199 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Dark Bluish Gray Part 2654 Element 4613980 or 4278274 ×3
  • Plate Round 4 x 4 with Pin Hole Dark Bluish Gray Part 60474 Element 4528323 ×1
  • Plate Special / Shield Rectangular with 4 Studs, Handle Dark Bluish Gray Part 30166 Element 6258991 ×2
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] Dark Bluish Gray Part 61252 Element 6360111 or 4579354 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Dark Bluish Gray Part 4081b Element 6281996 or 4632574 ×2
  • Plate Special 1 x 2 Rounded with 2 Open Studs Dark Bluish Gray Part 35480 Element 6221607 ×2
  • Plate Special 1 x 2 with Pin Hole on Top Dark Bluish Gray Part 11458 Element 6019987 ×3
  • Plate Special 1 x 4 with 2 Studs with Groove [New Underside] Dark Bluish Gray Part 41740 Element 6257592 ×1
  • Plate Special 4 x 4, Studs on One Edge Plain] Dark Bluish Gray Part 6179 Element 4509911 or 4210849 ×1
  • Pneumatic Hose Connector with Axle Connector Dark Bluish Gray Part 99021 Element 6265669 or 6020189 ×1
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×1
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Dark Bluish Gray Part 6629 Element 6279883 or 4210638 ×2
  • Technic Beam 3 x 3 T-Shape Thick Dark Bluish Gray Part 60484 Element 4552349 or 4535773 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×2
  • Weapon Gun / Pistol / Revolver Large Barrel, Long Grip Dark Bluish Gray Part 30132 Element 6359933 or 6056822 1 spare in the box ×6

Light Bluish Gray 66 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Light Bluish Gray Part 48729b Element 6278156 or 4542590 1 spare in the box ×2
  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×1
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×1
  • Bracket 1 x 2 - 1 x 2 Inverted Light Bluish Gray Part 99780 Element 6004990 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×2
  • Brick Round 2 x 2 Truncated Cone Light Bluish Gray Part 98100 Element 6028324 ×1
  • Brick Special 2 x 2 with Pin and Axle Hole Light Bluish Gray Part 6232 Element 6347704 or 4211529 ×2
  • Hinge Plate 1 x 2 Locking with 2 Fingers on Side, 7 Teeth Light Bluish Gray Part 50340 Element 6266209 ×2
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Light Bluish Gray Part 60897 Element 6296894 or 4613956 ×6
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Light Bluish Gray Part 60470b Element 6337268 or 4556157 ×13
  • Plate Special 1 x 2 with Wheel Holder, Single Slit Light Bluish Gray Part 21445 Element 6125569 ×1
  • Plate Special 1 x 2, Top Clip [Open O] Light Bluish Gray Part 44861 Element 6326078 ×4
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Light Bluish Gray Part 10247 Element 6045988 ×5
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×3
  • Technic Brick 4 x 4 with 2 x 2 Opening Light Bluish Gray Part 32324 Element 4211640 ×1
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×8
  • Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×2
  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×5
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Light Bluish Gray Part 6014b Element 4211764 ×1

Tan 28 pieces

  • Brick Special 1 x 2 with 2 Studs on 1 Side Tan Part 11211 Element 6024495 ×1
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×7
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×4
  • Plate Round 1 x 1 with Solid Stud Tan Part 6141 Element 4161734 or 614105 1 spare in the box ×9
  • Plate Special 1 x 2 with Three Teeth [Tri-Tooth] Tan Part 15208 Element 6046907 ×3
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×1
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×3

Pearl Gold 20 pieces

  • Large Figure Weapon Sword, 3 Bar Holes and Axle Hilt Pearl Gold Part 35633 Element 6330240 or 6270026 ×2
  • Plate Special 1 x 2 with Three Teeth [Tri-Tooth] Pearl Gold Part 15208 Element 6207764 ×6
  • Technic Wedge Belt Wheel Tire Pearl Gold Part 2815 Element 6232257 ×1
  • Technic Wedge Belt Wheel [aka Pulley] Pearl Gold Part 4185 Element 6323675 or 6257902 ×1
  • Tile Round 2 x 2 with 'Ninjago 10 Years' Print Pearl Gold Part 14769pr1174 Element 6321313 ×1
  • Weapon Harpoon [Smooth Shaft] Pearl Gold Part 18041 Element 6162580 or 6121352 1 spare in the box ×2
  • Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] Pearl Gold Part 21459 Element 6116596 2 spares in the box ×5
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Pearl Gold Part 56145 Element 4648531 ×1
  • Wheel 43.2 x 26 Technic Racing Small with 6 Pinholes Pearl Gold Part 56908 Element 6591614 or 6326764 ×1

Pearl Titanium 17 pieces

  • Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot] Pearl Titanium Part 99563 Element 6208447 ×17

Flat Silver 13 pieces

  • Plate Round 1 x 1 with Solid Stud Flat Silver Part 6141 Element 4633691 1 spare in the box ×8
  • Tile Special 1 x 2 Grille with Bottom Groove Flat Silver Part 2412b Element 4619636 ×3
  • Weapon Axe Head, Clip-on (Viking) [Thick Clip] Flat Silver Part 53454 Element 6363145 or 6292957 ×1
  • Weapon Sword / Saber with Curved Blade and Hilt Flat Silver Part 25111 Element 6172879 ×1

Sand Green 12 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Sand Green Part 61409 Element 6155256 ×10
  • Plate 1 x 6 Sand Green Part 3666 Element 6099187 or 4504795 ×2

Trans-Orange 11 pieces

  • Cone 1 x 1 [Top Groove] Trans-Orange Part 59900 Element 6514017 or 6172233 ×2
  • Projectile, Spring Shooter Ammunition 8L Bar Trans-Orange Part 15303 Element 6296380 or 6072635 ×9

White 11 pieces

  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Medium White Part 87747 Element 6270092 or 4613941 1 spare in the box ×6
  • Animal Body Part, Dog Bone [Long] White Part 92691 Element 4600307 ×1
  • Plate Special 1 x 2 with Door Rail White Part 32028 Element 6550168 or 4249563 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×3

Orange 9 pieces

  • Plate 2 x 4 Orange Part 3020 Element 4158355 or 4122468 ×1
  • Plate 4 x 6 Orange Part 3032 Element 6221691 or 4295308 ×1
  • Technic Axle and Pin Connector Angled #2 - 180° Orange Part 32034 Element 6271874 or 6135092 ×1
  • Wedge Plate 3 x 2 Left Orange Part 43723 Element 4180540 ×2
  • Wedge Plate 3 x 2 Right Orange Part 43722 Element 4180512 ×2
  • Wedge Plate 6 x 3 Left Orange Part 54384 Element 6099195 or 4544487 ×1
  • Wedge Plate 6 x 3 Right Orange Part 54383 Element 6099202 or 4544481 ×1

Red 9 pieces

  • Brick Special 1 x 2 with 2 Studs on 1 Side Red Part 11211 Element 6019155 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×2
  • Tile Special Round 2 x 2 with Hole Red Part 15535 Element 6102138 ×3

Reddish Brown 9 pieces

  • Brick Arch 1 x 4 Reddish Brown Part 3659 Element 6177697 or 6088713 ×2
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×3
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Reddish Brown Part 4032a Element 4211159 ×2
  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×2

Blue 7 pieces

  • Plate 1 x 3 Blue Part 3623 Element 362323 ×2
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×1
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×4

Dark Tan 6 pieces

  • Plate 2 x 6 Dark Tan Part 3795 Element 4550329 ×2
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1
  • Tile 2 x 2 with Groove Dark Tan Part 3068b Element 4507045 or 4251986 ×3

Dark Purple 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Purple Part 54200 Element 4567509 or 4255409 1 spare in the box ×4

Green 3 pieces

  • Plant, Round 1 x 1 - 3 Bamboo Leaves Green Part 30176 Element 6270003 or 6248461 ×2
  • Plate 1 x 6 Green Part 3666 Element 366628 ×1

Dark Brown 2 pieces

  • Tile Special 1 x 3 Inverted with Center Hole Dark Brown Part 35459 Element 6272145 ×2

Trans-Brown 2 pieces

  • Windscreen with Pearl Gold Frame Mold Trans-Brown Part 69564pr0001 ×1
  • Windscreen with Pearl Gold Frame Pattern Trans-Brown Part 69564pat0001 Element 6322113 ×1

Yellow 1 piece

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 71736-1 [No Color/Any Color] Part 71539 Element 6321409 ×1

Minifigures 4 figures

  • Cole with Hair (Legacy) - Master Torso Minifigure, checked as a whole figure ×1
  • Eyezor - Legacy Minifigure, checked as a whole figure ×1
  • Kai - Gold Minifigure, checked as a whole figure ×1
  • Lloyd (Legacy) - MASTER Minifigure, checked as a whole figure ×1

Tick each piece as you find it, or mark it missing.

When a piece really is missing

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