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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.

Kai's Source Dragon Battle

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71815 Kai's Source Dragon Battle

102 pieces in 64 part and color combinations, plus 4 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.

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Piece checklist

Black 26 pieces

  • Animal Body Part / Plant, Tail / Trunk / Tentacle / Tongue / Vine / Tree Branch (Long Tip) Black Part 80497 Element 6382249 ×3
  • Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Medium Black Part 87747 Element 6270091 or 4563477 ×2
  • Bar Holder with Clip Black Part 11090 Element 6315887 or 6015891 ×2
  • Bracket 1 x 2 - 2 x 2 Inverted Black Part 99207 Element 6000650 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Black Part 11477 Element 6047276 ×1
  • Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 ×1
  • Brick Special 1 x 2 with Vertical Clip [Open O Clip] Black Part 30237b Element 6330197 or 6092876 ×1
  • Hinge Plate 1 x 2 Locking with 1 Finger on Side, without Groove Black Part 44567b Element 6266244 ×1
  • Mudguard 2 x 4 with 2 x 2 Studs and Flared Wings Black Part 41854 Element 4184813 or 4163939 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate Special 2 x 2 with Wheels Holder Wide - Technic Pins Black Part 47720 Element 6354604 or 4217725 ×1
  • Plate Special 2 x 3 with Rocks Black Part 27261 Element 6195185 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×1
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 ×1
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Black Part 6014b Element 6286850 or 4186598 ×2
  • Wheel 37mm D. x 22mm, Pin Hole Black Part 2148 Element 6413638 ×2

Red 20 pieces

  • Brick Curved 3 x 2 No Studs Red Part 24309 Element 6132210 ×1
  • Brick Wedged 3 x 4 [Stud Notches] Red Part 50373 Element 6480713 or 4230901 ×1
  • Brick Wedged, Curved 6 x 4 Triple Red Part 43712 Element 6621800 or 6409628 ×1
  • Plate 1 x 4 Red Part 3710 Element 371021 ×1
  • Plate 2 x 4 Red Part 3020 Element 302021 ×3
  • Plate Special 1 x 2, Top Clip [Open O] Red Part 44861 Element 6347308 ×6
  • Technic Brick Special 1 x 2 with Pin Hole and 1 x 2 Plate Red Part 73109 Element 6385920 ×1
  • Tile Round 2 x 2 with Bottom Stud Holder Red Part 14769 Element 6066342 ×4
  • Wedge Plate 3 x 4 with Stud Notches [Reinforced Underside] Red Part 90194 Element 6170523 or 4649048 ×2

Dark Red 8 pieces

  • Animal Body Part, Dragon Head Long Dark Red Part 5496 Element 6472858 ×1
  • Brick Special 4 x 10 x 1 With 2 Wedges, Pin Holes, 4 x 2 Recessed Center Dark Red Part 65186 Element 6478025 or 6287589 ×1
  • Hinge Plate 1 x 12 Locking with Angled Side Extensions and Tapered Ends, 7 Teeth Dark Red Part 57906 Element 6426471 ×1
  • Mech Leg, Left, with Black Pin Dark Red Part 70946c01 Element 6491170 or 6440785 ×1
  • Mech Leg, Right, with Black Pin Dark Red Part 70943c01 Element 6491172 or 6440786 ×1
  • Plate 2 x 3 Dark Red Part 3021 Element 6264030 or 4541510 ×2
  • Wedge Plate 2 x 4 Dark Red Part 51739 Element 4541544 or 4257178 ×1

Dark Blue 7 pieces

  • Brick 1 x 2 Dark Blue Part 3004 Element 4249891 ×1
  • Brick Sloped 30° 1 x 2 x 2/3 Dark Blue Part 85984 Element 6554210 or 6216905 ×1
  • Brick Sloped 45° 2 x 2 Dark Blue Part 3039 Element 4153653 ×1
  • Plate 2 x 2 Dark Blue Part 3022 Element 6037890 or 4528982 ×1
  • Plate 2 x 8 Dark Blue Part 3034 Element 6027627 or 4530027 ×1
  • Plate Special 2 x 4 with Groove and Two Center Studs (Jumper) Dark Blue Part 65509 Element 6357956 ×1
  • Tile Special 1 x 2 with Handle Dark Blue Part 2432 Element 6554199 or 6097457 ×1

Trans-Purple 6 pieces

  • Cone 1 x 1 [Top Groove] Trans-Purple Part 59900 Element 6514023 or 6337603 ×4
  • Dish 2 x 2 Inverted [Radar] Trans-Purple Part 4740 Element 6580379 or 6245309 ×2

Magenta 5 pieces

  • Brick Sloped 30° 1 x 2 x 2/3 Magenta Part 85984 Element 6215168 ×1
  • Brick Sloped 33° 3 x 2 Magenta Part 3298 Element 4599547 ×2
  • Plant, Leaves 4 x 3 Magenta Part 2423 Element 6268822 or 6177019 ×2

Dark Tan 4 pieces

  • Brick Curved 2 x 2 x 2/3 Dark Tan Part 15068 Element 6093038 ×2
  • Plate Special 1 x 2 Rounded with 2 Open Studs Dark Tan Part 35480 Element 6231386 ×2

Opal Trans-Purple 4 pieces

  • Brick Wedged, Sloped 4 x 4 Fractured Polygon Top Opal Trans-Purple Part 64867 Element 6507893 or 6442194 ×1
  • Wave / Flame Rounded Large with Marbled Trans-Orange Pattern Opal Trans-Purple Part 85959pat0001 Element 6513990 or 6396460 ×3

Trans-Orange 4 pieces

  • Creature Body Part, Wing 11 x 6 with 3 Bars, Red Marble Pattern Trans-Orange Part 4899pat0003 Element 6510121 or 6455234 ×4

Dark Bluish Gray 3 pieces

  • Launcher, Brick Special 2 x 6 Spring Shooter with Light Bluish Gray Top Dark Bluish Gray Part 49743c01 Element 6296378 ×1
  • Plate Special 1 x 2 5.9mm Centre Side Towball Socket Dark Bluish Gray Part 14704 Element 6414562 or 6360823 ×1
  • Technic Pin with Friction, Bar 2L and Towball Dark Bluish Gray Part 80477 Element 6365695 ×1

Light Bluish Gray 3 pieces

  • Brick Special 1 x 2 with 1 Center Stud on 1 Side, Bottom Stud Holder Light Bluish Gray Part 86876 Element 6383177 ×1
  • Plate Special 2 x 2 with Wheels Holder Wide [Reinforced Underside Type 2] Light Bluish Gray Part 39767 Element 6387244 ×1
  • Projectile, Arrow with Shaft, Hollow Black Rubber End Light Bluish Gray Part 46537 Element 6307940 ×1

Pearl Gold 3 pieces

  • Creature Body Part, Dragon Head Upper Jaw with Bright Light Yellow Eyes, Dark Red/Black Markings Print Pearl Gold Part 72362pr0009 Element 6473867 ×1
  • Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] Pearl Gold Part 21459 Element 6116596 ×2

Sand Blue 3 pieces

  • Brick Curved 2 x 2 x 2/3 Sand Blue Part 15068 Element 6166865 ×1
  • Brick Special 1 x 2 with Vertical Closed Handle on Edge Sand Blue Part 34816 Element 6248968 ×2

Bright Light Orange 2 pieces

  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Bright Light Orange Part 60470b Element 6337271 or 6093459 ×2

Flat Silver 1 piece

  • Weapon Pike / Spear Flat End Flat Silver Part 93789 Element 4611883 ×1

Medium Nougat 1 piece

  • Plate 8 x 8 with Rounded End Medium Nougat Part 41948 Element 6301315 ×1

Pearl Titanium 1 piece

  • Weapon Sword with Jagged Edges and Trans-Red Flames Pattern Pearl Titanium Part 4924pat0001 Element 6512329 or 6480864 ×1

White 1 piece

  • Brick 1 x 2 x 2 with Inside Stud Holder White Part 3245c Element 6550139 or 4113261 ×1

Minifigures 4 figures

  • Kai - Heavy Shoulder Guards Minifigure, checked as a whole figure ×1
  • Wolf Mask Guard Minifigure, checked as a whole figure ×1
  • Wolf Mask Warrior Minifigure, checked as a whole figure ×1
  • Wyldfyre, Shoulder Guard 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.