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.

Checking

41237 Batgirl Secret Bunker

342 pieces in 172 part and color combinations, plus 2 minifigures.

The official piece count includes the 9 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. 4 parts 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.

Brick 2 x 2 Corner Black ×2 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Brick Curved 4 x 1 Double, No Studs Black ×3 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Brick Sloped 45° 2 x 1 with Bottom Pin Black ×3 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
Plate 2 x 6 Black ×2 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.

Piece checklist

Bricks Sloped 17 pieces

Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 Also in Dark Bluish Gray ×3
Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed, 2 Holes Black Part 72454 Element 4658977 ×2
Brick Sloped 65° 2 x 1 x 2 Dark Blue Part 60481 Element 6097429 ×2
Brick Sloped 45° 2 x 1 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 Also in Black ×1
Brick Sloped 75° 2 x 2 x 3 [Solid Studs] Dark Bluish Gray Part 98560 Element 6000853 ×1
Brick Sloped 30° 1 x 2 x 2/3 Medium Lavender Part 85984 Element 6335182 or 4625024 ×1
Brick Sloped 45° 1 x 1 x 2/3 Quadruple Convex [Pyramid] Trans-Bright Green Part 22388 Element 6554487 or 6309051 1 spare in the box ×4
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Yellow Part 54200 Element 6245272 or 4260942 1 spare in the box ×2
Brick Sloped 30° 1 x 2 x 2/3 Yellow Part 85984 Element 4550348 ×1

Technic Pins 15 pieces

Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×1
Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2
Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×1
Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×2
Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4
Technic Pin Long without Friction Ridges Tan Part 32556 ×1

Technic Bricks 14 pieces

Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×2
Technic Brick 1 x 1 with Pin Hole Light Bluish Gray Part 6541 Element 4211535 ×4
Technic Brick 1 x 1 with Pin Hole Tan Part 6541 Element 4179771 or 654105 ×5
Technic Brick 1 x 8 [7 Pin Holes] White Part 3702 Element 4582543 or 370201 ×2
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Yellow Part 32064a Element 6206240 or 4233484 ×1

Bricks Special 13 pieces

Brick Special 1 x 2 x 2/3 with Studs on Sides Black Part 4595 Element 6681661 or 4523339 ×1
Brick Special 1 x 2 with Masonry Brick Profile Dark Bluish Gray Part 98283 Element 6000311 ×5
Brick Special 1 x 2 with Pin Dark Bluish Gray Part 2458 Element 4211087 ×2
Brick Special 1 x 1 x 3 with 2 Clips Vertical [Hollow Stud, Open O Clips] Light Bluish Gray Part 60583b Element 6320356 or 6008364 ×3
Brick Special 1 x 1 Studs on 4 Sides White Part 4733 Element 4111971 or 473301 ×2

Technic Connectors 13 pieces

Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×2
Technic Axle and Pin Connector Toggle Joint Smooth Black Part 32126 Element 6457112 or 6322045 ×1
Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×2
Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×3
Technic Axle and Pin Connector Angled #5 - 112.5° White Part 32015 Element 6271349 or 6003297 ×1
Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×1
Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×2
Technic Axle Connector with Axle Hole Yellow Part 32039 Element 4107800 or 3203924 ×1

Bricks Curved 12 pieces

Brick Curved 2 x 2 x 2/3 Black Part 15068 Element 6053077 ×2
Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 Also in Dark Bluish Gray ×3
Brick Arch 1 x 8 x 2 Raised Dark Blue Part 16577 Element 6174427 ×1
Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes Dark Blue Part 88930 Element 6097430 ×1
Brick Arch 1 x 6 x 2 - Thin Top without Reinforced Underside [New Version] Dark Bluish Gray Part 15254 Element 6106191 or 6052786 ×1
Brick Curved 4 x 1 Double, No Studs Dark Bluish Gray Part 93273 Element 4648256 Also in Black ×1
Brick Arch 1 x 12 x 3 Raised Arch with 5 Cross Supports Light Bluish Gray Part 18838 Element 6246844 or 6096381 ×1
Brick Curved 3 x 1 No Studs Medium Lavender Part 50950 Element 4619514 ×2

Plates Round Curved and Dishes 11 pieces

Dish 2 x 2 Inverted [Radar] Black Part 4740 Element 474026 ×1
Dish 2 x 2 Inverted [Radar] Glitter Trans-Purple Part 4740 Element 6580381 or 6245345 ×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Light Bluish Gray Part 2654 Element 4278273 or 4276273 ×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Red Part 2654 Element 4617080 or 4278275 ×1
Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×5
Plate Round 1 x 1 with Solid Stud Trans-Purple Part 6141 Element 6514054 or 6240210 1 spare in the box ×2

Bricks Round and Cones 10 pieces

Brick Round 1 x 1 Open Stud Dark Bluish Gray Part 3062b Element 4211090 ×4
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Pearl Titanium Part 25214 Element 6156875 ×1
Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×2
Brick Round 2 x 2 Dome Top with Batgirl Mask Print Trans-Clear Part 30367cpr1013 Element 6188848 ×1
Brick Round 1 x 1 Open Stud Trans-Light Blue Part 3062b Element 6514238 or 6238677 ×1
Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×1

Panels 10 pieces

Panel 1 x 6 x 5 [Vertical Corrugated] Lavender Part 23405 Element 6182191 ×1
Panel 1 x 2 x 2 [Side Supports / Hollow Studs] Trans-Clear Part 87552 Element 6514185 or 6253231 ×2
Panel 1 x 2 x 3 [Side Supports / Hollow Studs] Trans-Purple Part 87544 Element 6239390 or 6152449 ×5
Panel 1 x 6 x 5 Trans-Purple Part 59349 Element 6245260 or 6096709 ×1
Panel 1 x 2 x 1 with Rounded Corners and Central Divider White Part 93095 Element 6670628 or 6615556 ×1

Technic Axles 9 pieces

Technic Axle 6 Black Part 3706 Element 370626 ×1
Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1
Technic Axle 2 Notched Red Part 32062 Element 4142865 ×6

Wheels and Tyres 9 pieces

Tyre 30.4 x 14 VR Solid Black Part 58090 Element 6601610 or 4550937 ×4
Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Dark Purple Part 55981 Element 6327074 or 6187077 ×4
Wheel Skateboard / Trolley Dark Purple Part 2496 Element 6061692 ×1

Bars, Ladders and Fences 8 pieces

Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×2
Lever Small Base with Black Lever Light Bluish Gray Part 298c02 Element 4221775 1 spare in the box ×1
Fence Spindled 1 x 4 x 2 [4 Top Studs] Medium Lavender Part 15332 Element 6093465 ×3
Bar 3L White Part 87994 Element 6552205 or 6428803 1 spare in the box ×1
Bar Holder with Clip Yellow Part 11090 Element 6341463 or 6015892 ×1

Tiles Special 8 pieces

Tile Special 1 x 1 with Clip with Rounded Edges Black Part 15712 Element 6335388 or 6066102 ×1
Tile Special Round 2 x 2 - Thick Lifting Ring Black Part 74698 Element 6010831 ×1
Tile Special 1 x 2 Grille with Bottom Groove Flat Silver Part 2412b Element 4619636 ×5
Tile Special Round 1 x 1 with Hollow Bar Trans-Clear Part 20482 Element 6507895 or 6186867 1 spare in the box ×1

Minifig Shields, Weapons, & Tools 5 pieces

Weapon Batarang Black Part 98721 Element 4650620 1 spare in the box ×1
Tool Grappling Hook with 90° Shaft Dark Bluish Gray Part 15534 Element 6269935 or 6055312 ×1
Weapon Bladed Claw Spread Flat Silver Part 10187 Element 6004345 1 spare in the box ×1
Weapon Batarang Yellow Part 98721 Element 6173918 1 spare in the box ×2

Transportation - Land 5 pieces

Wheel Arch, Mudguard 3 x 4 with 2 x 2 Plate Black Part 28326 Element 6170597 ×4
Steering Wheel Small, 2 x 2 [Reinforced] Light Bluish Gray Part 16091 Element 6092956 or 6061697 ×1

Hinges, Arms and Turntables 4 pieces

Hinge Brick 1 x 4 [Lower] Dark Bluish Gray Part 3831 Element 4210795 ×2
Hinge Brick 1 x 4 [Upper] Dark Bluish Gray Part 3830 Element 6327414 or 6011461 ×2

Tiles Round and Curved 4 pieces

Tile Round 2 x 2 with Yellow Bat Symbol and Small White Dots Print Medium Lavender Part 14769pr1076 Element 6186643 ×1
Tile Round 1 x 1 Trans-Yellow Part 98138 Element 6514193 or 6274740 1 spare in the box ×2
Tile Round 1 x 1 with Exclamation Mark on Blue Cloud Print Yellow Part 98138pr0054 Element 6175217 1 spare in the box ×1

Animal / Creature Body Parts 2 pieces

Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Medium Black Part 87747 Element 6270091 or 4563477 1 spare in the box ×2

Large Buildable Figures 2 pieces

Large Figure Wing, Small Yellow Part 61800 Element 6182199 ×2

Plates Wedged 2 pieces

Wedge Plate 4 x 2 Left Dark Blue Part 41770 Element 4529954 or 4247065 ×1
Wedge Plate 4 x 2 Right Dark Blue Part 41769 Element 4502091 or 4247066 ×1

Minifig Accessories 1 piece

Equipment Handcuffs Light Bluish Gray Part 61482 Element 6173615 or 4641048 1 spare in the box ×1

Minifig Lower Body 1 piece

Leg Skeleton Black Part 6266 Element 6240496 or 6038453 1 spare in the box ×1

Pneumatics 1 piece

Pneumatic Hose Connector with Axle Connector Dark Bluish Gray Part 99021 Element 6265669 or 6020189 ×1

Stickers 1 piece

Sticker Sheet for Set 41237-1 [No Color/Any Color] Part 33983 Element 6192539 ×1

Technic Beams 1 piece

Technic Beam 1 x 11 Thick Yellow Part 32525 Element 6028107 or 4534912 ×1

Technic Bushes 1 piece

Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×1

Tubes and Hoses 1 piece

Zipline, 22L with 2 Connectors - Flexible Medium Lavender Part 27965 Element 6200551 ×1

Windscreens and Fuselage 1 piece

Windscreen 2 x 6 x 2, Wide Top Trans-Clear Part 4176 Element 4502193 or 4179426 ×1

Minifigures 2 figures

Mad Harriet Minifigure, checked as a whole figure ×1
Batgirl, Medium Lavender Suit, Wings 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.