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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.

Checking

45826 SUBMERGED Challenge Set

1,899 pieces in 377 part and color combinations, plus 3 minifigures.

LEGO counts 1,899 pieces. This inventory comes from a separate parts catalog and lists 1,916, including the 17 parts inside the minifigures; 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.

Every bag and the box. Shake out each bag, check its corners and seams, and look inside the empty box.
Inside what you have built. Small pieces lodge inside tubes, under plates and between studs. Turn the model over and look.
The last few steps. Compare each recent step with its parts callout. A piece used in the wrong place earlier leaves you one short later.
Look-alike colors. 17 parts in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. Many sets include a few extra small pieces. Check them before you order a replacement.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

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.

Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black ×1 Dark Bluish Gray ×3 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 2 Thick Black ×1 Dark Bluish Gray ×8 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black ×2 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 3 Thick Black ×7 Dark Bluish Gray ×17 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 Thick Black ×14 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Thick Black ×1 Dark Bluish Gray ×8 Black is darker than Dark Bluish Gray.

11 more look-alike pairs

Technic Beam 1 x 9 Thick Black ×9 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.
Technic Beam 2 x 4 L-Shape Thick Black ×4 Dark Bluish Gray ×5 Black is darker than Dark Bluish Gray.
Technic Beam 3 x 3 T-Shape Thick Black ×4 Dark Bluish Gray ×11 Black is darker than Dark Bluish Gray.
Technic Beam 3 x 5 L-Shape Thick Black ×1 Dark Bluish Gray ×7 Black is darker than Dark Bluish Gray.
Technic Connector Beam 3 x 3 Black ×1 Dark Bluish Gray ×14 Black is darker than Dark Bluish Gray.
Technic Panel 3 x 11 x 1 Black ×4 Dark Bluish Gray ×3 Black is darker than Dark Bluish Gray.
Technic Panel 5 x 11 x 1 Black ×5 Dark Bluish Gray ×3 Black is darker than Dark Bluish Gray.
Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface Black ×2 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Technic Panel Round Corner 5 x 3 x 2 Left Black ×2 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Technic Pin Connector Hub with 2 Axles Black ×3 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Technic Pin Connector Round 1L [Beam] Black ×1 Dark Bluish Gray ×5 Black is darker than Dark Bluish Gray.

Piece checklist

Tiles Round and Curved 24 pieces

Tile Round 1 x 1 Black Part 98138 Element 6284070 or 6139403 ×10
Tile Round 1 x 1 with White Dot/Circle/Eye Print Black Part 98138pr0107 Element 6284072 or 6253831 ×4
Tile Round 1 x 1 Medium Azure Part 98138 Element 6322819 ×2
Tile Round 1 x 1 Trans-Yellow Part 98138 Element 6514193 or 6274740 ×4
Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 ×2
Tile Round 1 x 1 Yellowish Green Part 98138 Element 6284598 ×2

Tiles 21 pieces

Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×1
Tile 2 x 2 Corner Light Bluish Gray Part 14719 Element 6065824 ×3
Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×5
Tile 2 x 2 with 'SUBMERGED', Submarine in Light Blue Circle Print White Part 3068bpr0722 Element 6498786 ×12

Technic Beams Special 20 pieces

Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Black Part 14720 Element 6390379 ×1
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×5
Technic Beam Frame 7 x 11 Black Part 39794 Element 6265643 ×3
Technic Beam 2 x 3 Thick [90° Offset Centre Beam Hole] Dark Bluish Gray Part 3167 Element 6475314 ×6
Technic Beam Frame 11 x 15 Dark Bluish Gray Part 39790 Element 6265646 ×1
Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Light Bluish Gray Part 61408 Element 6331859 ×2
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×1
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick White Part 64179 Element 6632145 or 6016156 ×1

Bricks Curved 16 pieces

Brick Curved 4 x 2 No Studs Light Bluish Gray Part 93606 Element 4622742 ×1
Brick Curved 1 x 2 x 1 1/3 with Curved Top Red Part 6091 Element 6184782 or 609121 ×5
Brick Curved Inverted 2 x 1 Red Part 24201 Element 6186398 ×5
Brick Curved 4 x 1 Double, No Studs White Part 93273 Element 6552143 or 6023806 ×4
Brick Curved Inverted 2 x 2 x 2/3 White Part 32803 Element 6210385 ×1

Technic Bushes 16 pieces

Technic Bush Black Part 3713 Element 6332148 or 6210506 ×1
Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×9
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 ×4
Technic Bush Red Part 3713 Element 6271820 or 4227155 ×1
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 ×1

Plates 14 pieces

Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
Plate 1 x 6 Bright Light Blue Part 3666 Element 6361985 ×2
Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×5
Plate 2 x 8 Light Bluish Gray Part 3034 Element 4211406 ×1
Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×1
Plate 1 x 5 White Part 78329 Element 6550185 or 6350399 ×2
Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×1

Bricks Sloped 13 pieces

Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×1
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Light Bluish Gray Part 54200 Element 4521921 or 4244372 ×1
Brick Sloped 33° 3 x 1 Light Bluish Gray Part 4286 Element 4211488 ×1
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Lime Part 54200 Element 4504372 or 4298015 ×1
Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Lime Part 15672 Element 6170559 or 6069166 ×2
Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Red Part 15672 Element 6053011 or 4603263 ×2
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 ×2
Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed White Part 4871 Element 4173943 or 487101 ×3

Bricks Special 10 pieces

Brick Special 1 x 2 with Handle Black Part 30236 Element 4288212 or 4113243 ×1
Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Blue Part 32952 Element 6290531 ×4
Brick Special 1 x 2 with Studs on 2 Sides Red Part 52107 Element 4569056 ×5

Tiles Special 10 pieces

Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×4
Tile Special 2 x 2 Inverted Light Bluish Gray Part 11203 Element 6132886 ×2
Tile Special 1 x 1 with Clip with Rounded Edges Red Part 15712 Element 6348058 or 6072998 ×2
Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×2

Technic Special 8 pieces

Bar, Ring 7L Diameter, with 2 Axle Connectors Black Part 79851 Element 6360034 ×6
Technic Ball Joint Bright Light Orange Part 32474 Element 6071608 ×1
Technic Ball Joint White Part 32474 Element 6052864 or 4585627 ×1

Animals / Creatures 7 pieces

Animal / Plant, Coral / Sea Weed Coral Part 49577 Element 6292823 ×2
Animal / Plant, Coral / Sea Weed Magenta Part 49577 Element 6390725 ×1
Animal, Crab Red Part 33121 Element 6253363 or 6056486 ×4

Technic Gears 6 pieces

Technic Gear Rack 1/4 Circle 11 x 11, 35 Teeth Black Part 24121 Element 6322255 or 6224911 ×4
Technic Turntable Small Base, 28 Tooth Black Part 99010 Element 6326620 or 4652236 ×1
Technic Turntable Small Top Light Bluish Gray Part 99009 Element 4652235 ×1

Wheels and Tyres 6 pieces

Tyre 24 x 14 Shallow Tread (Tread Small Hub), Band Around Center of Tread Black Part 89201 Element 6132299 or 4639695 ×1
Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes Black Part 55982 Element 4517737 ×1
Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Yellow Part 6014b Element 4170460 ×4

Flags, Banners and Signs 5 pieces

Flag 2 x 2 Trapezoid with Flared Area between Clips White Part 80324 Element 6365500 ×3
Flag 6 x 4 with U-Clips White Part 53912 Element 6444258 or 6331725 ×2

Technic Bricks 5 pieces

Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Black Part 32064a Element 6178922 or 4233487 ×1
Technic Brick 1 x 1 with Axle Hole Dark Bluish Gray Part 73230 Element 6362259 ×2
Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×2

Animal / Creature Body Parts 4 pieces

Animal Body Part / Plant, Tail / Trunk / Tentacle / Tongue / Vine / Tree Branch (Long Tip) Red Part 80497 Element 6410124 ×4

Bricks Wedged 4 pieces

Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs with 'SUBMERGED', Submarine in Light Blue Circle Print White Part 45677pr0027 Element 6498787 ×4

Plates Wedged 4 pieces

Wedge Plate 3 x 2 Left Light Bluish Gray Part 43723 Element 4211794 ×1
Wedge Plate 3 x 2 Right Light Bluish Gray Part 43722 Element 4211791 ×1
Wedge Plate 2 x 2 Cut Corner White Part 26601 Element 6552166 or 6550160 ×2

Transportation - Sea and Air 4 pieces

Technic Cylinder 4 x 4 with Pin Holes and Centre Bar, Closed Sides on Bar Dark Blue Part 41531 Element 6482974 or 6143407 ×2
Technic Pin with Dual Wheels Holder Light Bluish Gray Part 61483 Element 6331440 or 4519013 ×2

Containers 3 pieces

Barrel Half Large with Axle Hole Reddish Brown Part 64951 Element 4541875 ×1
Treasure Chest Bottom with Rear Slots, No Groove Reddish Brown Part 4738c Element 4533101 ×1
Treasure Chest Lid [Thick Hinge] Reddish Brown Part 4739a Element 6254220 or 6167676 ×1

Minifig Accessories 2 pieces

Minifig Footwear Flipper [Thick] Orange Part 10190 Element 6441059 or 6172934 ×2

Windscreens and Fuselage 2 pieces

Windscreen 4 x 4 x 1 2/3 Canopy Half Sphere with Handle Trans-Clear Part 18990 Element 6514145 or 6244781 ×2

Bricks 1 piece

Brick 1 x 2 Black Part 3004 Element 300426 ×1

Large Buildable Figures 1 piece

Large Figure Weapon, Barrel with 2 Pin Holes and 3 Axle Holes Red Part 98585 Element 6313596 ×1

Non-System Parts 1 piece

Playmat, FFL SUBMERGED [No Color/Any Color] Part 65090 Element 6491120 ×1

Rock 1 piece

Rock 1 x 1 Crystal 5 Point Trans-Bright Green Part 30385 Element 6507862 or 6170292 ×1

Minifigures 3 figures

Skeleton, Standard Face, Bent Arms, Vertical Hand Clips, 78132 Torso Minifigure, checked as a whole figure ×1
Diver, Black Suit Minifigure, checked as a whole figure ×1
Figurehead, Black Top, Sand Green Mermaid Tail Minifigure, checked as a whole figure ×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.