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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

7021 Viking Double Catapult versus the Armored Ofnir Dragon

487 pieces in 130 part and color combinations, plus 3 minifigures.

The official piece count includes the 18 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.

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. 1 part in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. This set comes with 12 spare pieces, marked on each row of the checklist. One may be the piece you need.
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.

Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section Black ×1 Dark Blue ×4 Black is yellower and darker than Dark Blue.

Piece checklist

Technic Pins 89 pieces

Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×13
Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×18
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction Black Part 47455 Element 4272426 or 4213374 ×11
Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×10
Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 2 spares in the box ×24
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Light Bluish Gray Part 32054 Element 4211865 ×3
Technic Pin Long without Friction Ridges - Single Slot Light Bluish Gray Part 32556a Element 4211709 ×4
Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×6

Technic Beams 27 pieces

Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×4
Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×2
Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×6
Technic Beam 1 x 11 Thick Dark Bluish Gray Part 32525 Element 4603472 or 4534914 ×2
Technic Beam 1 x 2 Thin Dark Bluish Gray Part 41677 Element 6338422 or 4210980 ×3
Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 ×6
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin Dark Bluish Gray Part 32250 Element 32250199 or 6327165 ×4

Technic Connectors 27 pieces

Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×6
Technic Axle and Pin Connector Perpendicular Double Split Black Part 41678 Element 4162857 ×3
Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Dark Blue Part 32174 Element 4194991 ×3
Technic Axle and Pin Connector 2 x 5 with Two Ball Joint Sockets Dark Blue Part 47296 Element 4249003 ×4
Technic Axle and Pin Connector Angled #1 Dark Bluish Gray Part 32013 Element 32013199 or 6296856 ×2
Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×3
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Bluish Gray Part 32184 Element 6276969 or 4211621 ×2
Technic Axle Connector Ridged [with x Hole x Orientation] Red Part 6538b Element 4125189 ×3
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Red Part 42003 Element 6273712 or 4175442 ×1

Technic Axles 26 pieces

Technic Axle 12 Black Part 3708 Element 370826 ×1
Technic Axle 4 Black Part 3705 Element 370526 ×3
Technic Axle 3 with Stud Dark Bluish Gray Part 6587 Element 6587199 or 6129590 ×3
Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×7
Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×4
Technic Axle 2 Notched Red Part 32062 Element 4142865 1 spare in the box ×8

Bricks Special 20 pieces

Brick Special 1 x 2 Palisade [aka Log] Reddish Brown Part 30136 Element 4211180 ×10
Brick Special 1 x 4 Palisade [aka Log] Reddish Brown Part 30137 Element 4211181 ×10

Bricks Round and Cones 17 pieces

Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×5
Brick Round 1 x 1 Open Stud Reddish Brown Part 3062b Element 4211183 ×2
Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Reddish Brown Part 6222 Element 6177805 or 4223681 ×4
Brick Round 1 x 1 Open Stud Trans-Neon Orange Part 3062b Element 6238676 or 4153989 ×6

Large Buildable Figures 17 pieces

Large Figure Skeletal, Torso, Chest (Rahkshi) Black Part 44136 Element 4278806 ×2
Large Figure Skeletal, Limb, Angular 90°, 4 x 4 x 2 with 2 Ball Joints, and Axle Hole Dark Blue Part 41670 Element 4299761 ×2
Large Figure Skeletal, Limb, Angular 90°, 3 x 3 x 2 with 2 Ball Joints, and Axle Hole Dark Bluish Gray Part 47300 Element 4540593 or 4289249 ×2
Large Figure Foot, with Rotation Joint Ball Half [Vertical Side] Pearl Light Gray Part 47430 Element 4493866 or 4299763 ×2
Large Figure Head Fenrakk Pearl Light Gray Part 54273 Element 4493863 or 4279769 ×1
Large Figure Shoulder Cover, Armor, Smooth Pearl Light Gray Part 50602 Element 4284499 or 4244770 ×4
Large Figure Shoulder Cover, Armor, Spiky Pearl Light Gray Part 54175 Element 4493867 or 4299764 ×2
Large Figure Weapon, Claw, Triple, with Axle Pearl Light Gray Part 32506 Element 4284479 or 4236020 ×2

Technic Special 17 pieces

Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Vertical Side], Rotation Joint Socket Black Part 47432 Element 4218083 ×2
Technic Disc 3 x 3 Black Part 2723 Element 4218868 or 4121619 ×2
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket Dark Blue Part 47452 Element 4492782 ×4
Technic Brick Special 2 x 3 with Pin Holes, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket Dark Blue Part 47454 Element 4218113 ×2
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side] Dark Bluish Gray Part 48171 Element 6492115 or 6343337 ×1
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket Dark Bluish Gray Part 48169 Element 6278974 or 4225973 ×4
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Red Part 41669 Element 4163567 ×2

Hinges, Arms and Turntables 16 pieces

Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×2
Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Black Part 30552 Element 4158848 ×2
Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Black Part 30553 Element 4143372 ×2
Hinge Brick 1 x 2 Base Light Bluish Gray Part 3937 Element 4211469 ×4
Hinge Brick 1 x 2 Locking with 1 Finger Vertical End Light Bluish Gray Part 30364 Element 4211693 ×2
Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×2
Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth White Part 44302a Element 4183048 ×2

Plates Special 16 pieces

Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×2
Bracket 1 x 2 - 1 x 4 [Square Corners] Light Bluish Gray Part 2436 Element 4282740 or 4211358 ×4
Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Light Bluish Gray Part 6019 Element 4211518 ×2
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Light Bluish Gray Part 2444 Element 4211359 or 2444194 ×4
Plate Special 1 x 1 with Clip Vertical [Thick U Clip] White Part 4085c Element 408501 ×4

Technic Bushes 16 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 ×8
Technic Bush Red Part 3713 Element 6271820 or 4227155 2 spares in the box ×8

Bricks Sloped 12 pieces

Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Black Part 3048c Element 304826 ×6
Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Dark Blue Part 3747a Element 6097491 or 4500467 ×2
Brick Sloped Inverted 45° 4 x 2 Double with 2 x 2 Recessed Dark Blue Part 4871 Element 6475225 or 4261784 ×2
Brick Sloped 45° 2 x 2 Double Convex Dark Bluish Gray Part 3045 Element 4210646 ×2

Bricks Wedged 10 pieces

Brick Wedged, Curved Inverted 6 x 4 Dark Blue Part 43713 Element 6109925 or 4261774 ×2
Brick Wedged, Sloped 4 x 2 Triple Left Dark Blue Part 43710 Element 6612894 or 6135183 ×2
Brick Wedged, Sloped 4 x 2 Triple Right Dark Blue Part 43711 Element 6612893 or 6135185 ×2
Brick Wedged, Sloped 4 x 4 Triple, Stud Notches Dark Bluish Gray Part 48933 Element 6356488 or 4225873 ×1
Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Pearl Light Gray Part 47456 Element 4493865 or 4286598 ×3

Plates Wedged 10 pieces

Wedge Plate 4 x 4 Cut Corner Black Part 30503 Element 4160025 ×2
Wedge Plate 12 x 3 Left Reddish Brown Part 47397 Element 6503734 or 6035545 ×1
Wedge Plate 12 x 3 Right Reddish Brown Part 47398 Element 6503735 or 6035538 ×1
Wedge Plate 4 x 2 Left Reddish Brown Part 41770 Element 4205470 ×3
Wedge Plate 4 x 2 Right Reddish Brown Part 41769 Element 4205469 ×3

Technic Bricks 9 pieces

Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×1
Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×4
Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×4

Tiles Special 9 pieces

Tile Special 1 x 1 with Clip and Straight Tips Dark Bluish Gray Part 2555 Element 6031420 or 4211069 ×2
Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×7

Bars, Ladders and Fences 6 pieces

Bar 1 x 4 x 3 Window [Side Tabs] Dark Bluish Gray Part 6016 Element 4210643 ×1
Bar 8L - Two Stop Rings / One Pin, Technic Figure Ski Pole [Rounded End] Light Bluish Gray Part 2714a ×3
Bar 6.6L with Stop Ring [Umbrella Stand] Reddish Brown Part 4095 Element 4211294 ×2

Bricks 6 pieces

Brick 1 x 3 Reddish Brown Part 3622 Element 4245312 or 4211220 ×1
Brick 2 x 10 Reddish Brown Part 3006 Element 6096716 or 4617863 ×1
Brick 2 x 6 Reddish Brown Part 2456 Element 4286200 or 4216615 ×2
Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×1
Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×1

Bricks Curved 6 pieces

Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Pearl Light Gray Part 47457 Element 4493864 or 4286596 ×6

Minifig Shields, Weapons, & Tools 5 pieces

Weapon Pike / Spear Round End Pearl Light Gray Part 4497 Element 4278811 or 4267358 ×3
Weapon Axe Head, Clip-on (Viking) [Thin Clip] Speckle Black-Silver Part 53705 Element 6108518 or 6051378 ×2

Plates Round Curved and Dishes 5 pieces

Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Reddish Brown Part 4032a Element 4211159 ×1
Dish 4 x 4 Inverted [Radar] with Viking Shield Red / White Sections and Red Serpent Print Tan Part 3960pr0006 Element 4273896 ×4

Pneumatics 4 pieces

Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 1 spare in the box ×4

Rock 4 pieces

Rock Boulder 4 x 4, Bottom with Marbled Trans-Neon Orange Pattern Dark Bluish Gray Part 30294pat0001 Element 4288141 ×2
Rock Boulder 4 x 4, Top with Marbled Trans-Neon Orange Pattern Dark Bluish Gray Part 30293pat0001 Element 4285879 ×2

Wheels and Tyres 4 pieces

Wheel Wagon Viking with 12 Holes [7 Studs Diameter] Dark Bluish Gray Part 55817 Element 6264148 or 6034887 ×4

Technic Beams Special 3 pieces

Technic Beam 1 x 2 with Ball Joint Angled Dark Bluish Gray Part 50923 Element 4503381 or 4289258 ×3

String, Bands and Reels 2 pieces

Chain 17L [21 Links] Dark Bluish Gray Part 30104 Element 4516717 or 4211035 ×2

Tiles 2 pieces

Tile 1 x 4 with Viking Snakes Knotwork Print Reddish Brown Part 2431pr0032 Element 4490372 ×2

Energy Effects 1 piece

Large Figure Weapon Sword, Toa Flame 2 x 12 with Two Holes, Marbled Yellow Pattern Red Part 32558pat0001 Element 4492787 ×1

Stickers 1 piece

Sticker Sheet for Sets 7018-1, 7021-1 [No Color/Any Color] Part 54208 Element 4277640 ×1

Minifigures 3 figures

Viking Warrior - Armour, Sand Blue Arms, Reddish Brown Legs Minifigure, checked as a whole figure ×1
Viking Warrior - Armour, Dark Red Arms Minifigure, checked as a whole figure ×1
Viking Warrior - Armour, Bare Arms 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.