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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

41254 Volcano Rock City Concert

380 pieces in 168 part and color combinations, plus 3 minifigures.

LEGO counts 387 pieces. This inventory comes from a separate parts catalog and lists 396, including the 16 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. 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 22 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.

Plate 1 x 2 Black ×1 Dark Blue ×2 Black is yellower and darker than Dark Blue.

Piece checklist

Tiles Special 22 pieces

Tile Special 2 x 2 with Top Pin Black Part 2460 Element 4258354 or 246026 ×1
Tile, Star with Stud Holder, Pin Hole Bright Light Orange Part 11609 Element 6432033 or 6167776 1 spare in the box ×3
Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×4
Tile Special 1 x 2 Grille with Bottom Groove Red Part 2412b Element 241221 ×2
Tile Special 1 x 1 with Clip with Rounded Edges White Part 15712 Element 6348055 or 6054551 ×2
Tile Special 1 x 2 with Two Vertical Teeth / Tooth White Part 15209 Element 6046384 ×4
Tile Special Round 1 x 1 with Hollow Bar White Part 20482 Element 6186681 or 6178492 1 spare in the box ×6

Bricks Curved 18 pieces

Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 ×1
Brick Curved 2 x 2 x 2/3 Light Bluish Gray Part 15068 Element 6102357 ×2
Brick Curved Inverted 2 x 2 x 2/3 Light Bluish Gray Part 32803 Element 6185676 ×1
Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs Magenta Part 49307 Element 6278442 ×6
Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Medium Blue Part 47457 Element 6294676 or 4218572 ×4
Brick Arch 1 x 4 White Part 3659 Element 6550145 or 365901 ×2
Brick Curved Inverted 2 x 2 x 2/3 White Part 32803 Element 6210385 ×2

Bricks Special 16 pieces

Brick Special 1 x 2 with Studs on 2 Sides Black Part 52107 Element 4253815 ×6
Brick Special 1 x 4 with 4 Studs on One Side Black Part 30414 Element 4162443 ×2
Brick Special 1 x 2 with 2 Studs on 1 Side Dark Blue Part 11211 Element 6554205 or 6135606 ×2
Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Light Bluish Gray Part 32952 Element 6225242 ×2
Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side Red Part 22885 Element 6135130 ×1
Brick Special 1 x 1 with Stud on 1 Side Tan Part 87087 Element 4579260 ×1
Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×2

Tiles 16 pieces

Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1
Tile 1 x 2 with Groove Bright Light Orange Part 3069b Element 4622062 ×4
Tile 2 x 4 with Groove Dark Blue Part 87079 Element 4569836 ×2
Tile 2 x 3 Magenta Part 26603 Element 6468041 or 6292373 ×2
Tile 1 x 2 with Groove Medium Blue Part 3069b Element 4168345 ×4
Tile 1 x 4 with Groove Medium Blue Part 2431 Element 6590053 or 4597999 ×1
Tile 2 x 2 Corner White Part 14719 Element 6550151 or 6058329 ×2

Bars, Ladders and Fences 10 pieces

Antenna 1 x 4 with Flat Top Black Part 3957b Element 395726 ×2
Bar 3L Light Bluish Gray Part 87994 Element 6093527 or 6064033 1 spare in the box ×2
Curled Decorative Ornament / Plant Vine with Bar Pearl Gold Part 28870 Element 6172437 ×4
Bar 4L (Lightsaber Blade / Wand) Trans-Red Part 30374 Element 6507880 or 6167284 ×1
Lever Small Base with Black Lever White Part 298c02 Element 73737 1 spare in the box ×1

Bricks Sloped 9 pieces

Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×2
Brick Sloped 45° 1 x 1 x 2/3 Quadruple Convex [Pyramid] Light Bluish Gray Part 22388 Element 6258381 1 spare in the box ×1
Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Light Bluish Gray Part 3747b Element 4211570 ×2
Brick Sloped Inverted 45° 2 x 1 Medium Blue Part 3665 Element 4598015 or 4179831 ×4

Hinges, Arms and Turntables 8 pieces

Hinge Brick 1 x 4 [Lower] Black Part 3831 Element 383126 ×2
Hinge Brick 1 x 4 [Upper] Black Part 3830 Element 6344999 or 6011458 ×2
Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×2
Turntable 2 x 2 Female White Part 27448 Element 6536567 or 6238334 ×2

Bricks Round and Cones 5 pieces

Brick Round 2 x 2 with Axle Hole Dark Blue Part 3941 Element 4505985 ×2
Brick Round 2 x 2, Pin Holes Light Bluish Gray Part 17485 Element 6372076 or 6078985 ×1
Cone 1 x 1 [Top Groove] Magenta Part 59900 Element 6003007 ×1
Cone 1 x 1 [Top Groove] Trans-Purple Part 59900 Element 6514023 or 6337603 ×1

Energy Effects 5 pieces

Wave / Flame Rounded with Base Rim Trans-Orange Part 6126b Element 6167741 or 4261397 ×1
Wave / Flame Small with Pin Trans-Orange Part 37775 Element 6514274 or 6357747 1 spare in the box ×2
Wave / Lightning Angular, Single Trans-Purple Part 27256 Element 6294681 ×1
Wave / Lightning Angular, Single Trans-Red Part 27256 Element 6294682 ×1

Animal / Creature Body Parts 4 pieces

Felt Wing, Large with Square Hole Bright Light Orange Part 66833 Element 6290413 ×2
Felt Wing, Small with Square Hole Dark Purple Part 66832 Element 6299329 ×2

Technic Bricks 4 pieces

Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×2
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 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×1

Panels 3 pieces

Panel 1 x 2 x 1 with Rounded Corners and 2 Sides Magenta Part 23969 Element 6248482 or 6131870 ×2
Panel 1 x 2 x 1 with Rounded Corners and 2 Sides Trans-Light Blue Part 23969 Element 6507955 or 6248908 ×1

Minifig Lower Body 2 pieces

Leg Tall, Skeleton Black Part 23769 Element 6570742 or 6296799 ×2

Minifig Upper Body 2 pieces

Arm Skeleton [Bent / 2 Clips] Black Part 93609 Element 6326681 or 6146095 1 spare in the box ×2

Plants & Trees 2 pieces

Plant, Flower, 7 Petals on Pin Flat Silver Part 65468f ×1
Plant, Flower, Plate Round 1 x 1 with 5 Petals Lavender Part 24866 Element 6214235 1 spare in the box ×1

Supports, Girders and Cranes 2 pieces

Support 2 x 2 x 10 Girder Triangular Vertical - Type 4 - 3 Posts, 3 Sections Black Part 95347 Element 6470981 or 4667463 ×2

Technic Pins 2 pieces

Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×2

Transportation - Land 2 pieces

Vehicle Track, Roller Coaster, Curve Lavender Part 25061 Element 6290515 ×2

Flags, Banners and Signs 1 piece

Road Sign Clip-on 2.2 x 2.667 Triangular Light Bluish Gray Part 30259 Element 4211886 ×1

Minifig Headwear Accessories 1 piece

Headwear Accessory Heart on Pin Flat Silver Part 65468e ×1

Rock 1 piece

Rock 1 x 1 Jewel / Gem 24 Facet Trans-Light Blue Part 30153 Element 6513972 or 6247792 1 spare in the box ×1

Stickers 1 piece

Sticker Sheet for Set 41254-1 [No Color/Any Color] Part 66350 Element 6287724 ×1

String, Bands and Reels 1 piece

Chain 6L [5 Links] Dark Bluish Gray Part 92338 Element 6311445 or 4600437 ×1

Technic Axles 1 piece

Technic Axle 4 Black Part 3705 Element 370526 ×1

Technic Connectors 1 piece

Technic Axle and Pin Connector Angled #1 Light Bluish Gray Part 32013 Element 6296859 or 4211550 ×1

Minifigures 3 figures

Trolls - Poppy with Dark Blue Shirt Minifigure, checked as a whole figure ×1
Trolls - Barb Minifigure, checked as a whole figure ×1
Trolls - Branch with Sad Face 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.