BlockTalk Find Your Set

Free tool

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.

Turtle Sub Undersea Chase

Checking

79121 Turtle Sub Undersea Chase

662 pieces in 215 part and color combinations, plus 5 minifigures.

The official piece count includes the 22 parts inside the set's minifigures, which this inventory lists separately. 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.

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.

Show

Piece checklist

Plates 150 pieces

  • Plate 2 x 3 Black Part 3021 Element 302126 ×6
  • Plate 4 x 8 Black Part 3035 Element 303526 ×2
  • Plate 6 x 8 Black Part 3036 Element 303676 or 303626 ×2
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×3
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 ×2
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×17
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×8
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×3
  • Plate 2 x 8 Dark Bluish Gray Part 3034 Element 4210997 ×2
  • Plate 8 x 8 Dark Bluish Gray Part 41539 Element 4210802 ×2
  • Plate 1 x 8 Dark Brown Part 3460 Element 4519946 Also in Reddish Brown ×2
  • Plate 1 x 2 Dark Tan Part 3023 Element 4528604 or 4497082 ×4
  • Plate 1 x 6 Dark Tan Part 3666 Element 6015424 ×2
  • Plate 2 x 2 Green Part 3022 Element 302228 ×1
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×2
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×2
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×8
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×5
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×14
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×1
  • Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×4
  • Plate 2 x 2 Medium Nougat Part 3022 Element 6056383 or 4645059 ×2
  • Plate 2 x 8 Olive Green Part 3034 Element 6273296 or 6073988 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×11
  • Plate 1 x 12 Reddish Brown Part 60479 Element 6055145 ×4
  • Plate 1 x 2 Reddish Brown Part 3023 Element 4211150 ×18
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×10
  • Plate 1 x 8 Reddish Brown Part 3460 Element 4216945 Also in Dark Brown ×3
  • Plate 4 x 10 Reddish Brown Part 3030 Element 4225715 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×5
  • Plate 2 x 6 Yellow Part 3795 Element 379524 ×2

Plates Round Curved and Dishes 61 pieces

  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×1
  • Plate Round 1 x 1 with Solid Stud Flat Silver Part 6141 Element 4633691 ×10
  • Plate Round 1 x 1 with Solid Stud Glow in Dark White Part 6141 Element 6351958 or 6238048 ×1
  • Dish 6 x 6 Inverted (Radar) with Solid Studs Light Bluish Gray Part 44375b Element 4211796 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Light Bluish Gray Part 2654 Element 4278273 or 4276273 ×10
  • Plate Round 4 x 4 with 2 x 2 Round Opening Light Bluish Gray Part 11833 Element 6167798 or 6028015 ×2
  • Plate Round 6 x 6 with Hole Light Bluish Gray Part 11213 Element 6015349 ×1
  • Plate Round 1 x 1 with Solid Stud Reddish Brown Part 6141 Element 4216581 ×20
  • Dish 4 x 4 Inverted [Radar] Trans-Bright Green Part 3960 Element 6070270 ×2
  • Dish 2 x 2 Inverted [Radar] Trans-Dark Pink Part 4740 Element 6580376 or 6245302 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×6
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×2

Plates Special 60 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Black Part 60897 Element 6330189 or 4617547 ×8
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Black Part 3794b Element 379426 ×1
  • Plate Special 1 x 2 with Clip Horizontal on End Black Part 63868 Element 6336989 or 4535739 ×2
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Black Part 60470b Element 6310268 or 4556158 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Black Part 10247 Element 6061032 Also in Dark Bluish Gray ×4
  • 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 [Complete Underside Rib] Dark Bluish Gray Part 10247 Element 6047417 Also in Black ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Purple Part 87580 Element 6446090 or 6126086 ×1
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Light Bluish Gray Part 48336 Element 4244627 ×6
  • Plate Special 1 x 2 with Clip Horizontal on Side Light Bluish Gray Part 11476 Element 6313114 or 6028812 ×2
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Light Bluish Gray Part 92593 Element 4599498 ×2
  • Plate Special 2 x 2 with 2 Pin Holes Light Bluish Gray Part 2817 Element 4211376 ×2
  • Plate Special 2 x 4 with Pins Light Bluish Gray Part 30157 Element 4211572 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Light Bluish Gray Part 3176 Element 4211419 ×1
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Olive Green Part 92593 Element 6024727 ×5
  • Bracket 1 x 2 - 1 x 4 [Rounded Corners] Red Part 10201 Element 6089576 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Red Part 3794b Element 379421 ×1
  • Plate Special 1 x 2, Top Clip [Split] Red Part 92280 Element 4597713 ×4
  • Bracket 1 x 2 - 2 x 2 Tan Part 44728 Element 6117975 or 6048857 ×3

Bricks Curved 54 pieces

  • Brick Arch 1 x 4 Black Part 3659 Element 365926 ×2
  • Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 ×6
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Dark Bluish Gray Part 47457 Element 4218696 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Brown Part 11477 Element 6046943 ×2
  • Brick Arch 1 x 12 x 3 Light Bluish Gray Part 6108 Element 4224592 ×2
  • Brick Arch 1 x 3 x 2 Curved Top Light Bluish Gray Part 6005 Element 4625619 or 4541259 ×8
  • Brick Arch 1 x 6 Raised Arch Light Bluish Gray Part 92950 Element 4618874 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Light Bluish Gray Part 6091 Element 6285778 or 4211519 ×4
  • Brick Curved 2 x 8 x 2 Double Light Bluish Gray Part 11290 Element 6171081 or 6070266 ×1
  • Brick Curved 4 x 1 Double, No Studs Light Bluish Gray Part 93273 Element 4622803 ×1
  • Brick Curved Inverted 2 x 8 x 2 Double Light Bluish Gray Part 11301 Element 6202481 or 6070267 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Olive Green Part 11477 Element 6031787 ×4
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Olive Green Part 47457 Element 6073984 ×4
  • Brick Curved 4 x 1 Double, No Studs Olive Green Part 93273 Element 6016482 ×9
  • Brick Arch 1 x 4 Red Part 3659 Element 365921 ×2
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Reddish Brown Part 47457 Element 6484018 or 6058134 ×3
  • Brick Curved 4 x 1 Double, No Studs Reddish Brown Part 93273 Element 4658005 ×1

Bricks 46 pieces

  • Brick 2 x 8 Black Part 3007 Element 6037390 or 300726 ×2
  • Brick 2 x 2 Dark Bluish Gray Part 3003 Element 4211060 ×2
  • Brick 1 x 8 Dark Tan Part 3008 Element 6024124 ×2
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×15
  • Brick 1 x 6 Light Bluish Gray Part 3009 Element 4211393 ×5
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×4
  • Brick 2 x 2 Corner Light Bluish Gray Part 2357 Element 4211349 ×4
  • Brick 2 x 6 Light Bluish Gray Part 2456 Element 4274668 or 4211795 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×4
  • Brick 1 x 2 x 2 with Inside Stud Holder Red Part 3245c Element 4143832 ×2
  • Brick 1 x 6 Red Part 3009 Element 300921 ×1
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×1
  • Brick 2 x 6 Reddish Brown Part 2456 Element 4286200 or 4216615 ×1
  • Brick 1 x 8 White Part 3008 Element 6550134 or 300801 ×2

Bricks Special 37 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Black Part 87087 Element 4558954 ×4
  • Brick Special 1 x 1 with Clip Vertical [Thick U Clip, Solid Stud] Dark Bluish Gray Part 60475a ×4
  • Brick Special 1 x 2 with Grille Dark Bluish Gray Part 2877 Element 4210636 ×4
  • Brick Special 1 x 1 with Stud on 1 Side Light Bluish Gray Part 87087 Element 4558953 ×6
  • Brick Special 1 x 2 Palisade [aka Log] Medium Nougat Part 30136 Element 4651231 ×6
  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×4
  • Brick Special 1 x 2 with Pin Red Part 2458 Element 245821 ×6
  • Brick Special 1 x 4 with 4 Studs on One Side Tan Part 30414 Element 4201062 or 4177990 ×2
  • Brick Special 2 x 2 with Pin and Axle Hole Tan Part 6232 Element 6347700 or 4185273 ×1

Tiles 35 pieces

  • Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 ×2
  • Tile 1 x 4 with Groove Dark Bluish Gray Part 2431 Element 4211053 ×2
  • Tile 1 x 8 with Groove Dark Bluish Gray Part 4162 Element 5210651 or 4211008 ×1
  • Tile 1 x 2 with Groove Green Part 3069b Element 306928 ×3
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×1
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×1
  • Tile 1 x 8 with Groove Light Bluish Gray Part 4162 Element 4211481 ×4
  • Tile 2 x 4 with Groove Light Bluish Gray Part 87079 Element 4560183 ×4
  • Tile 1 x 2 with Groove Medium Nougat Part 3069b Element 6021997 ×2
  • Tile 1 x 4 with Groove Reddish Brown Part 2431 Element 4211194 ×4
  • Tile 2 x 4 with Groove Reddish Brown Part 87079 Element 4579690 ×4
  • Tile 1 x 1 with Groove Trans-Red Part 3070b Element 6581817 or 6254248 ×2
  • Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×2
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1
  • Tile 2 x 2 with Groove Yellow Part 3068b Element 6388487 or 306824 ×1
  • Tile 2 x 4 with Groove Yellow Part 87079 Element 6388490 or 4560181 ×1

Bricks Sloped 29 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×2
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Purple Part 54200 Element 4567509 or 4255409 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×8
  • Brick Sloped 33° 3 x 1 Light Bluish Gray Part 4286 Element 4211488 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Light Bluish Gray Part 3747b Element 4211570 ×1
  • Brick Sloped 45° 2 x 1 with Bottom Pin Olive Green Part 3040b Element 6064670 ×4
  • Brick Sloped 45° 2 x 2 Olive Green Part 3039 Element 6016474 ×4
  • Brick Sloped 33° 3 x 3 Double Convex Reddish Brown Part 3675 Element 6073014 or 4541269 ×2

Technic Pins 27 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×7
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×1
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×6
  • Technic Pin 1/2 with 2L Bar Extension Light Bluish Gray Part 61184 Element 6347715 or 4520320 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×5
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×2

Technic Bricks 23 pieces

  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×7
  • Technic Brick 5 x 5 Right Angle (1 x 4 - 1 x 4) Black Part 32555 Element 6170702 or 4529549 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Bluish Gray Part 3700 Element 4211111 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Light Bluish Gray Part 3701 Element 4211441 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Light Bluish Gray Part 3894 Element 4211466 ×4
  • Technic Brick 1 x 1 with Pin Hole Reddish Brown Part 6541 Element 4620075 or 4528461 ×2
  • Technic Slope Long 1 x 6 with 3 Pin Holes White Part 2744 Element 6167025 or 4528417 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Yellow Part 32064b ×2

Tiles Special 19 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Flat Silver Part 2412b Element 4619636 ×11
  • Tile Special 1 x 1 with Clip with Rounded Tips Light Bluish Gray Part 12825 Element 6030711 ×3
  • Tile Special 1 x 2 with Handle Light Bluish Gray Part 2432 Element 4211357 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Tan Part 2412b Element 4124456 or 393305 ×4

Bricks Round and Cones 17 pieces

  • Brick Round Corner 6 x 6 with 33° Slope and Facet Cutout Dark Bluish Gray Part 95188 Element 4622338 ×2
  • Cone 1 x 1 [Top Groove] Dark Bluish Gray Part 59900 Element 4529240 ×1
  • Cone 2 x 2 x 2, Open Stud Dark Bluish Gray Part 3942c Element 6533790 or 6092666 ×1
  • Brick Round Corner 2 x 2 Macaroni with Stud Notch and Reinforced Underside [New Style] Dark Tan Part 85080 Element 6001826 ×8
  • Brick Round 2 x 2 x 1 2/3 Dome Top, Blocked Open Stud Trans-Clear Part 30151a Element 4113949 ×1
  • Cone 1 x 1 [Top Groove] Trans-Purple Part 59900 Element 6514023 or 6337603 ×4

Bricks Wedged 17 pieces

  • Brick Wedged, Curved Inverted 6 x 4 Dark Bluish Gray Part 43713 Element 4636417 or 4180470 ×1
  • Brick Wedged 2 x 2 Facet Dark Tan Part 87620 Element 6020847 ×4
  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Olive Green Part 45677 Element 6024696 ×8
  • Brick Wedged, Sloped 4 x 2 Triple Left Olive Green Part 43710 Element 6064662 ×2
  • Brick Wedged, Sloped 4 x 2 Triple Right Olive Green Part 43711 Element 6064659 ×2

Plates Wedged 12 pieces

  • Wedge Plate 4 x 2 Left Black Part 41770 Element 4161332 ×2
  • Wedge Plate 4 x 2 Right Black Part 41769 Element 4160869 ×2
  • Wedge Plate 8 x 3, 22° Left Black Part 50305 Element 4251394 ×2
  • Wedge Plate 8 x 3, 22° Right Black Part 50304 Element 4251393 ×2
  • Wedge Plate 4 x 4 Cut Corner Light Bluish Gray Part 30503 Element 4160560 ×2
  • Wedge Plate 6 x 6 Cut Corner Light Bluish Gray Part 6106 Element 4211520 ×2

Wheels and Tyres 10 pieces

  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Bluish Gray Part 4185 Element 6321743 or 4494222 ×2
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×4
  • Wheel 8 x 6 Light Bluish Gray Part 4624 Element 4211506 ×2

Technic Connectors 9 pieces

  • Technic Pin Connector Plate with One Hole (Single on Bottom) Black Part 32529 Element 4144023 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Dark Bluish Gray Part 59443 Element 6084613 or 4516546 ×1
  • Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] Dark Bluish Gray Part 32530 Element 4210763 ×1
  • Technic Pin Connector Round [Slotted] Flat Silver Part 62462 Element 6245499 or 6054858 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Red Part 59443 Element 4513174 ×3
  • Technic Axle Connector Smooth [with x Hole + Orientation] Reddish Brown Part 59443 Element 4531751 ×1

Panels 7 pieces

  • Panel 1 x 2 x 1 [Rounded Corners] Green Part 4865b Element 6146227 or 4542189 ×4
  • Panel 1 x 4 x 3 [Side Supports / Hollow Studs] Trans-Clear Part 60581 Element 6514156 or 6344088 ×2
  • Panel 1 x 2 x 1 with Rounded Corners and Central Divider Yellow Part 93095 Element 4621603 ×1

Hinges, Arms and Turntables 6 pieces

  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Dark Bluish Gray Part 44567a Element 4210892 ×2
  • Plate Special 4 x 6 with Trap Door Hinge [Long Pins] Dark Bluish Gray Part 92099 Element 4595710 ×1
  • Plate Special 6 x 8 Trap Door Frame Horizontal [Long Pin Holders] Dark Bluish Gray Part 92107 Element 4595708 ×1
  • Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth Light Bluish Gray Part 30365 Element 4211694 ×2

Technic Axles 6 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×4
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×1

Technic Beams 6 pieces

  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Light Bluish Gray Part 60483 Element 6265089 or 6004888 ×2
  • Technic Beam 1 x 3 Thick Light Bluish Gray Part 32523 Element 4211655 ×2

Technic Bushes 6 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×4
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 ×2

Transportation - Sea and Air 6 pieces

  • Propeller 3 Blade 3 Diameter with Axle Cross Black Part 6041 Element 604126 ×1
  • Engine Smooth Large [2 x 2 Thin Top Plate] Dark Bluish Gray Part 4868b Element 6605550 or 4579639 ×2
  • Engine Centre - Smooth Large Light Bluish Gray Part 4869 Element 4211825 ×2
  • Technic Pin with Dual Wheels Holder Light Bluish Gray Part 61483 Element 6331440 or 4519013 ×1

Bars, Ladders and Fences 4 pieces

  • Lever Small Base with Black Lever Black Part 298c02 Element 73587 ×1
  • Bar 4L (Lightsaber Blade / Wand) Light Bluish Gray Part 30374 Element 6116608 or 4211628 ×1
  • Bar 6L with Stop Ring Reddish Brown Part 63965 Element 6170468 or 6155727 ×1
  • Bar 4L (Lightsaber Blade / Wand) Trans-Purple Part 30374 Element 6507883 or 6170191 ×1

Minifig Shields, Weapons, & Tools 4 pieces

  • Weapon Spear Gun with Rounded Trigger and Thin Spear Base Black Part 30088 Element 4287672 ×2
  • Weapon Sword / Katana / Shamshir with Uncapped Pommel [Square Guard] Flat Silver Part 30173b Element 4569471 ×2

Transportation - Land 4 pieces

  • Handlebars Light Bluish Gray Part 30031 Element 4258308 ×2
  • Steering Wheel Small, 2 x 2 Light Bluish Gray Part 30663 Element 30663194 or 4211701 ×1
  • Mudguard 2 x 4 with 2 x 2 Studs and Flared Wings Olive Green Part 41854 Element 6016462 ×1

Projectiles / Launchers 2 pieces

  • Launcher, Technic Competition Cannon Flat Bottom [Complete Assembly] Dark Bluish Gray Part 57796 Element 6064131 or 4518308 ×1
  • Projectile, Technic Competition Arrow, Liftarm Shaft with Hollow Black Rubber End Light Bluish Gray Part 57028c01 Element 4299625 ×1

Tiles Round and Curved 2 pieces

  • Tile Round 1 x 1 Trans-Dark Pink Part 98138 Element 6514196 or 6274745 ×2

Containers 1 piece

  • Barrel 2 x 2 x 2 Reddish Brown Part 2489 Element 6605306 or 6278989 ×1

Stickers 1 piece

  • Sticker Sheet for Set 79121-1 [No Color/Any Color] Part 17453 Element 6071443 ×1

Tools 1 piece

  • Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Minifigures 5 figures

  • Donatello in Scuba Gear Minifigure, checked as a whole figure ×1
  • Leatherhead Minifigure, checked as a whole figure ×1
  • Leonardo in Scuba Gear Minifigure, checked as a whole figure ×1
  • The Kraang with Light Bluish Gray Armor and Neck Bracket with Horn Minifigure, checked as a whole figure ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy