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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
620 pieces in 184 part and color combinations, plus 4 minifigures.
The official piece count includes the 25 parts inside the set's minifigures, which this inventory lists separately. Spare parts are counted in neither figure.
Your missing list
LEGO's request form asks for the set number (2521) and each piece's element ID, both listed above.
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Piece checklist
Black
143 pieces
Arm Mechanical with Clip [Thin Support]
Black
Part 53989
Element 4623154 or 4294996
×6
Missing
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
×3
Missing
Bar 8L - Two Stop Rings / One Pin, Technic Figure Ski Pole [Rounded End]
Black
Part 2714a
Element 4120251
×2
Missing
Bracket 1 x 2 - 2 x 2
Black
Part 44728
Element 6117973 or 6048855
×2
Missing
Brick 1 x 6
Black
Part 3009
Element 300926
×1
Missing
Brick 2 x 6
Black
Part 2456
Element 4181144 or 245626
×1
Missing
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate
Black
Part 61409
Element 4541191
×4
Missing
Brick Sloped Inverted 34° 3 x 1 with Internal Stopper
Black
Part 4287b
×2
Missing
Brick Special 1 x 2 with Studs on 2 Sides
Black
Part 52107
Element 4253815
×4
Missing
Brick Wedged, Angled 3 x 2 Left
Black
Part 6565
Element 4527766 or 656526
×2
Missing
Brick Wedged, Angled 3 x 2 Right
Black
Part 6564
Element 4526931 or 656426
×2
Missing
Brick Wedged, Curved 6 x 2 Left, Inner Ridges
Black
Part 41748
Element 4160130
×1
Missing
Brick Wedged, Curved 6 x 2 Right, Inner Ridges
Black
Part 41747
Element 4160108
×1
Missing
Hinge Brick 1 x 2 Locking with 1 Finger Vertical End and 2 Fingers Vertical End, 9 Teeth
Black
Part 30386
Element 4167106 or 3038626
×6
Missing
Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth
Black
Part 30553
Element 4143372
×3
Missing
Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole
Black
Part 41532
Element 4159335
×1
Missing
Hinge Plate 1 x 12 Locking with Angled Side Extensions and Tapered Ends, 7 Teeth
Black
Part 57906
Element 6525158 or 4636410
×4
Missing
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]
Black
Part 73983
Element 6102782 or 74011
×16
Missing
Hinge Plate 2 x 2 Locking with 1 Finger on Top
Black
Part 92582
Element 6265730 or 4613759
×2
Missing
Large Figure Foot, Claw, Piraka
Black
Part 53562
Element 4584550
×4
Missing
Plate 1 x 2
Black
Part 3023
Element 302326
×2
Missing
Plate 1 x 3
Black
Part 3623
Element 362326
×4
Missing
Plate 1 x 4
Black
Part 3710
Element 371026
×3
Missing
Plate 2 x 2 Corner
Black
Part 2420
Element 242026
Also in Dark Blue
×2
Missing
Plate 2 x 4
Black
Part 3020
Element 302026
Also in Dark Bluish Gray
×5
Missing
Plate 2 x 6
Black
Part 3795
Element 379526
×2
Missing
Plate 4 x 4
Black
Part 3031
Element 4243819 or 303126
Also in Dark Bluish Gray
×4
Missing
Plate Special 1 x 2 with Angled Handles on Side
Black
Part 92692
Element 4604304
×2
Missing
Plate Special 1 x 2 with Clip Horizontal on End
Black
Part 63868
Element 6336989 or 4535739
×4
Missing
Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub
Black
Part 2479
Element 247926
×1
Missing
String Cord Thin (0.5mm) 50cm
Black
Part 56823c50
Element 6530026 or 6489925
×1
Missing
Technic Axle 4
Black
Part 3705
Element 370526
×2
Missing
Technic Axle 8
Black
Part 3707
Element 370726
×1
Missing
Technic Axle Connector Smooth [with x Hole + Orientation]
Black
Part 59443
Element 6084612 or 4512363
×1
Missing
Technic Axle and Pin Connector Angled #1
Black
Part 32013
Element 6284699 or 4107085
×1
Missing
Technic Axle and Pin Connector Angled #5 - 112.5°
Black
Part 32015
Element 6271346 or 4107084
×4
Missing
Technic Brick 1 x 1 with Pin Hole
Black
Part 6541
Element 654126
×2
Missing
Technic Brick 1 x 10 [9 Pin Holes]
Black
Part 2730
Element 273026
×2
Missing
Technic Disc 3 x 3
Black
Part 2723
Element 4218868 or 4121619
×1
Missing
Technic Pin Connector Round [Slotted]
Black
Part 62462
Element 6173119 or 4526982
×2
Missing
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]
Black
Part 32054
Element 4140801 or 4107742
×4
Missing
Technic Rotation Joint Ball Loop with Two Perpendicular Pins with Friction
Black
Part 47455
Element 4272426 or 4213374
×7
Missing
Technic Slope Long 1 x 6 with 3 Pin Holes
Black
Part 2744
Element 6311889 or 274426
×2
Missing
Tile 1 x 3
Black
Part 63864
Element 4558170
×2
Missing
Tile 1 x 4 with Groove
Black
Part 2431
Element 243126
×2
Missing
Tile Special 1 x 1 with Clip and Straight Tips
Black
Part 2555
Element 255526
×4
Missing
Tile Special 2 x 2 with Top Pin
Black
Part 2460
Element 4258354 or 246026
×1
Missing
Tile Special Round 2 x 2 - Thin Lifting Ring
Black
Part 2376
Element 237626
×1
Missing
Weapon Lightsaber Hilt with Bottom Ring
Black
Part 64567
Element 4614712 or 4598897
×4
Missing
Weapon Sword / Katana / Shamshir with Uncapped Pommel [Square Guard]
Black
Part 30173b
×1
Missing
Wedge Plate 4 x 6 Cut Corners
Black
Part 32059
Element 4129572
×2
Missing
White
102 pieces
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Medium
White
Part 87747
Element 6270092 or 4613941
×8
Missing
Arm Mechanical with Clip [Thin Support]
White
Part 53989
Element 4622904 or 4296948
×4
Missing
Bracket 1 x 2 - 1 x 4 [Square Corners]
White
Part 2436
Element 4282737 or 4159314
×3
Missing
Bracket 1 x 2 - 2 x 2
White
Part 44728
Element 6619296 or 6117940
×3
Missing
Brick Curved 4 x 1 No Studs [Stud Holder with Asymmetric Ridges]
White
Part 61678
×2
Missing
Brick Round 2 x 2 Dome Top, Blocked Open Stud, Bottom Axle Holder
White
Part 30367b
×8
Missing
Brick Sloped 18° 4 x 1
White
Part 60477
Element 6619300 or 4515359
×2
Missing
Brick Sloped 45° 2 x 1 Double / Inverted with Bottom Stud Holder
White
Part 3049d
Element 6059271 or 4629772
×7
Missing
Brick Sloped 45° 2 x 1 with Bottom Pin
White
Part 3040b
Element 6552115 or 4121932
×2
Missing
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]
White
Part 3660
Element 366001
×2
Missing
Brick Special 1 x 4 with 4 Studs on One Side
White
Part 30414
Element 6550167 or 4143254
×2
Missing
Brick Wedged, Curved 6 x 4 Triple
White
Part 43712
Element 4179869
×1
Missing
Brick Wedged, Sloped 4 x 4 Triple, Stud Notches
White
Part 48933
Element 6299775 or 4264026
×2
Missing
Cone 1 x 1 [Top Groove]
White
Part 59900
Element 6601844 or 4518400
×12
Missing
Hinge Plate 1 x 4 Locking Dual 1 Finger
White
Part 44568
Element 6276043 or 4193479
×1
Missing
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly]
White
Part 73983
Element 6102776 or 4287153
×3
Missing
Minifig Head Skeleton, Skull, Evil with Scowl Black Print, Red Eyes Print [Blocked Open Stud]
White
Part 3626bpr0494
Element 4506829
×4
Missing
Plate 1 x 1
White
Part 3024
Element 6548262 or 302401
×2
Missing
Plate 1 x 12
White
Part 60479
Element 6552130 or 6548269
×2
Missing
Plate 1 x 2
White
Part 3023
Element 6552100 or 6548261
×3
Missing
Plate 1 x 4
White
Part 3710
Element 6552108 or 6548266
×2
Missing
Plate 2 x 4
White
Part 3020
Element 6552098 or 302001
×2
Missing
Plate Special 1 x 2 with 1 Stud with Groove (Jumper)
White
Part 3794b
×2
Missing
Plate Special 2 x 2 with Bar Frame Octagonal
White
Part 30033
Element 3003301
×1
Missing
Technic Brick 1 x 1 with Pin Hole
White
Part 6541
Element 6609542 or 654101
×10
Missing
Tile 1 x 6 with Groove
White
Part 6636
Element 6548296 or 663601
×8
Missing
Tile 2 x 2 with Red Skull in Black Circle Print
White
Part 3068bpr0187
Element 4612858
×1
Missing
Tile 2 x 4 with Japanese 'Dragon God' Print
White
Part 87079pr0008
Element 4612857
×2
Missing
Wedge Plate 4 x 6 Cut Corners
White
Part 32059
Element 4508408 or 4117026
×1
Missing
Dark Bluish Gray
75 pieces
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]
Dark Bluish Gray
Part 3660
Element 4211000
×4
Missing
Brick Sloped Inverted 45° 4 x 4 Double with 4 x 2 Recessed, 2 Holes
Dark Bluish Gray
Part 72454
Element 4658974
×1
Missing
Brick Special 1 x 1 with Stud on 1 Side
Dark Bluish Gray
Part 87087
Element 4558955
×2
Missing
Brick Special 1 x 4 with 4 Studs on One Side
Dark Bluish Gray
Part 30414
Element 4210725
×2
Missing
Brick Wedged, Curved Inverted 6 x 4
Dark Bluish Gray
Part 43713
Element 4636417 or 4180470
×2
Missing
Creature Body Part, Dragon Head Lower Jaw with White Teeth and Yellow Spines Print
Dark Bluish Gray
Part 93072pr0003
Element 4636346
×1
Missing
Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove
Dark Bluish Gray
Part 44301a
Element 4210883
×4
Missing
Hook with Towball
Dark Bluish Gray
Part 30395
Element 30395199 or 6347464
×1
Missing
Plate 2 x 3
Dark Bluish Gray
Part 3021
Element 4211043
×10
Missing
Plate 2 x 4
Dark Bluish Gray
Part 3020
Element 4211065
Also in Black
×1
Missing
Plate 4 x 4
Dark Bluish Gray
Part 3031
Element 4243831 or 4211089
Also in Black
×2
Missing
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]
Dark Bluish Gray
Part 2654
Element 4613980 or 4278274
×1
Missing
Plate Special 1 x 2 Side Handle [Free Ends]
Dark Bluish Gray
Part 2540
Element 4210660
×2
Missing
Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs]
Dark Bluish Gray
Part 2444
Element 4196768
×2
Missing
Technic Axle 5.5 with Stop [Rounded Short End]
Dark Bluish Gray
Part 59426
Element 4508553
×1
Missing
Technic Axle Connector 2 x 3 with Ball Socket [Closed Sides, Squared Ends, Open Lower Axle Holes]
Dark Bluish Gray
Part 89652
Element 4598441
×4
Missing
Technic Axle and Pin Connector 2 x 5 with Two Ball Joint Sockets [Closed Sides] [Open Axle Holes]
Dark Bluish Gray
Part 89650
Element 4598409
×1
Missing
Technic Brick 1 x 2 [1 Pin Hole]
Dark Bluish Gray
Part 3700
Element 4211111
×1
Missing
Technic Brick Special 2 x 2 with 10.2mm Balls [Center Mold Indention]
Dark Bluish Gray
Part 57908
Element 4498096
×4
Missing
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole
Dark Bluish Gray
Part 92013
Element 4619760
×4
Missing
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top]
Dark Bluish Gray
Part 48170
Element 6279898 or 4227395
×3
Missing
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Horizontal Top], Rotation Joint Socket
Dark Bluish Gray
Part 47452
Element 6021206 or 4636472
×2
Missing
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Ball Half [Vertical Side]
Dark Bluish Gray
Part 48171
Element 6492115 or 6343337
×2
Missing
Technic Brick Special 2 x 2 with Pin Hole, Rotation Joint Socket
Dark Bluish Gray
Part 48169
Element 6278974 or 4225973
×5
Missing
Technic Brick Special 2 x 2 with Solid Ball and Axle Hole
Dark Bluish Gray
Part 57909a
×1
Missing
Technic Gear 24 Tooth [New Style with Single Axle Hole]
Dark Bluish Gray
Part 3648b
Element 6133119 or 4514558
×1
Missing
Technic Gear 8 Tooth
Dark Bluish Gray
Part 3647
Element 4514559
1 spare in the box
×1
Missing
Wedge Plate 3 x 2 Left
Dark Bluish Gray
Part 43723
Element 4210872
×4
Missing
Wedge Plate 3 x 2 Right
Dark Bluish Gray
Part 43722
Element 4210869
×4
Missing
Wedge Plate 6 x 3 Left
Dark Bluish Gray
Part 54384
Element 4290149
×1
Missing
Wedge Plate 6 x 3 Right
Dark Bluish Gray
Part 54383
Element 4290150
×1
Missing
Light Bluish Gray
40 pieces
Trans-Medium Blue
23 pieces
Trans-Bright Green
1 piece
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.