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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.

Droid Developer Kit

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9748 Droid Developer Kit

658 pieces in 127 part and color combinations.

LEGO counts 657 pieces. This inventory comes from a separate parts catalog and lists 658; 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.

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Piece checklist

Light Gray 239 pieces

  • Axle Hose, Soft 12L Light Gray Part 32200 Element 4125558 ×1
  • Axle Hose, Soft 19L Light Gray Part 32235 Element 4125559 ×1
  • Hose, Ribbed 7mm D. 4L / 3.2cm Light Gray Part 78c04 Element 4125376 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×7
  • Plate 1 x 3 Light Gray Part 3623 Element 362302 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×2
  • Plate 2 x 10 Light Gray Part 3832 Element 383202 ×2
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×6
  • Plate 2 x 2 Corner Light Gray Part 2420 Element 242052 or 242002 ×4
  • Plate Round 1 x 1 with Solid Stud Light Gray Part 6141 Element 614102 1 spare in the box ×18
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×2
  • Plate Special 1 x 2 with Door Rail Light Gray Part 32028 Element 4109642 ×8
  • Technic Axle Connector with Axle Hole Light Gray Part 32039 Element 4106469 ×8
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×33
  • Technic Axle Towball Light Gray Part 2736 Element 273602 ×4
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×11
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Light Gray Part 32068 Element 4114669 ×2
  • Technic Axle and Pin Connector Toggle Joint Smooth Light Gray Part 32126 Element 4112931 ×5
  • Technic Beam 1 x 3 Thin Light Gray Part 6632 Element 4107825 ×2
  • Technic Beam 1 x 4 Thin with Stud Connector Light Gray Part 2825 Element 4107133 or 282502 ×1
  • Technic Beam 1 x 5 Thin Light Gray Part 32017 Element 4106885 ×5
  • Technic Beam 1 x 6 Thin Light Gray Part 32063 Element 4114200 ×8
  • Technic Beam 1 x 7 Thin Light Gray Part 32065 Element 4125563 or 4114567 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Light Gray Part 32271 Element 4125561 ×2
  • Technic Beam 2 x 4 L-Shape Thick Light Gray Part 32140 Element 4121620 ×5
  • Technic Brick 1 x 1 with Pin Hole Light Gray Part 6541 Element 654102 ×6
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges Light Gray Part 32064c ×2
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×17
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×21
  • Technic Flex Cable 5L Light Gray Part flex08c05 ×2
  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×6
  • Technic Gear 12 Tooth Double Bevel Light Gray Part 32270 Element 4141454 or 4125322 ×2
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×4
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Light Gray Part 32269 Element 4141455 ×3
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Light Gray Part 3648b Element 4107543 or 364802 ×3
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×1
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×12
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×4
  • Technic Worm Gear Light Gray Part 4716 Element 471602 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Light Gray Part 2412b Element 241202 ×4
  • Tyre 30 x 10.5 Offset Tread Light Gray Part 2346 Element 4112832 ×4
  • Wheel with Split Axle hole Light Gray Part 3482 Element 348202 ×4

White 209 pieces

  • Axle Hose, Soft 11L White Part 32199 Element 6384174 or 4125556 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin White Part 3040b Element 6552115 or 4121932 ×4
  • Brick Sloped 45° 2 x 2 White Part 3039 Element 6552103 or 303901 ×4
  • Brick Sloped 45° 2 x 2 Double Convex White Part 3045 Element 4233370 or 304501 ×4
  • Brick Sloped 45° 2 x 4 White Part 3037 Element 6552102 or 303701 ×6
  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper White Part 4287a ×2
  • Dish 2 x 2 Inverted [Radar] White Part 4740 Element 6601845 or 474001 ×2
  • Hose, Ribbed 7mm D. 8L / 6.4cm White Part 78c08 Element 4125374 1 spare in the box ×1
  • Hub, Micro Scout with Blue Buttons and Dark Gray Base White Part 32344c01 Element 4142783 ×1
  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints White Part 32173 Element 4120124 ×2
  • Plate 1 x 10 White Part 4477 Element 6552113 or 6550148 ×4
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×4
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×6
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×4
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×4
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×4
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides White Part 32174 Element 4125555 ×4
  • Technic Axle Connector Ridged [with x Hole x Orientation] White Part 6538b Element 4113803 or 4100407 ×10
  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×6
  • Technic Axle and Pin Connector Angled #2 - 180° White Part 32034 Element 6271870 or 4125554 ×4
  • Technic Axle and Pin Connector Angled #3 - 157.5° White Part 32016 Element 6261390 or 6063767 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° White Part 32015 Element 6271349 or 6003297 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° White Part 32014 Element 6450588 or 6268926 ×4
  • Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×14
  • Technic Beam 1 x 11.5 Double Bent Thick White Part 32009 Element 6271161 or 6004157 ×3
  • Technic Beam 1 x 3 Thin White Part 6632 Element 6360038 or 4107826 ×12
  • Technic Beam 1 x 4 Thin with Stud Connector White Part 2825 Element 4528324 or 4107132 ×7
  • Technic Beam 1 x 5 Thin White Part 32017 Element 4125365 ×4
  • Technic Beam 1 x 7 with Fan White Part 32177 Element 4531187 or 4119338 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick White Part 32271 Element 6276842 or 6004144 ×7
  • Technic Beam 3 x 3 L-Shape Thin White Part 32056 Element 4112174 ×4
  • Technic Beam Triangle Thin [Type I] White Part 2905 Element 4142538 or 290501 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] White Part 3703 Element 4508661 or 370301 ×4
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×5
  • Technic Brick 1 x 2 [2 Pin Holes] White Part 32000 Element 6564911 or 3200001 ×4
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Ridges White Part 32064c ×1
  • Technic Brick 1 x 4 [3 Pin Holes] White Part 3701 Element 6601913 or 370101 ×12
  • Technic Brick 1 x 6 [5 Pin Holes] White Part 3894 Element 389401 ×8
  • Technic Brick 1 x 8 [7 Pin Holes] White Part 3702 Element 4582543 or 370201 ×2
  • Technic Connector Block 3 x 3 Triangular with Axle, and Pin Hole White Part 32175 Element 4249265 or 4125367 ×2
  • Technic Gearbox Half White Part 32166 Element 4119293 ×2
  • Technic Panel Fairing # 3 Large Long, Large Holes, Side A White Part 32188 Element 4125363 ×2
  • Technic Panel Fairing # 4 Large Long, Large Holes, Side B White Part 32189 Element 4125364 ×2
  • Technic Pin Connector Round [No Slot] White Part 75535 Element 75535 ×2
  • Technic Pin Double with Axle Hole White Part 32138 Element 4130594 or 4118979 ×4
  • Technic Slope Long 1 x 6 with 3 Pin Holes White Part 2744 Element 6167025 or 4528417 ×2
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×4
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×2

Black 139 pieces

  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×2
  • Rubber Band Small 13mm (Square Cross Section) Black Part 71509 Element 4141606 or 4107153 1 spare in the box ×2
  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×19
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×19
  • Technic Axle 4 Black Part 3705 Element 370526 ×12
  • Technic Axle 5 Black Part 32073 Element 4114740 ×5
  • Technic Axle 6 Black Part 3706 Element 370626 ×9
  • Technic Axle 8 Black Part 3707 Element 370726 ×3
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×3
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×2
  • Technic Flex Cable End - Ball Connection with Cage Black Part 6644 Element 664426 ×4
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×20
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×34
  • Technic Steering Arm with 2 Pins Black Part 32069 Element 6278276 or 4114671 ×2

Blue 33 pieces

  • Hose, Ribbed 7mm D. 8L / 6.4cm Blue Part 78c08 Element 4226955 or 4189403 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Blue Part 6538b Element 4113807 or 4107802 ×4
  • Technic Axle Connector with Axle Hole Blue Part 32039 Element 6330996 or 4107801 ×6
  • Technic Axle and Pin Connector Angled #1 Blue Part 32013 Element 6332570 or 4107797 ×4
  • Technic Beam 1 x 11.5 Double Bent Thick Blue Part 32009 Element 6271153 or 4112000 ×4
  • Technic Beam 1 x 7 with Fan Blue Part 32177 Element 4125368 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Blue Part 32054 Element 4140800 or 4107741 ×8
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×2
  • Technic Turntable 4 x 6 Complete Assembly (Mindstorms) Blue Part 32273c01 Element 4128503 ×1

Dark Gray 25 pieces

  • Axle Hose, Soft 11L Dark Gray Part 32199 Element 4125557 ×4
  • Hose Rigid 3mm D. 3L / 2.4cm Dark Gray Part 75c03 Element 4118604 1 spare in the box ×2
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×3
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 1 spare in the box ×16

Dark Turquoise 8 pieces

  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Dark Turquoise Part 32054 Element 4140804 or 4120240 ×8

Metallic Silver 2 pieces

  • Technic Panel Dome 6 x 6 x 5 2/3 with R2-D2 Eye Print Metallic Silver Part 51pr0002 Element 4128502 ×1
  • Technic Panel Dome 6 x 6 x 5 2/3 with R2-D2 No Eye Print Metallic Silver Part 51pr0001 Element 4128501 ×1

Trans-Red 2 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×2

[No Color/Any Color] 1 piece

  • CD-Rom, for 9748 [No Color/Any Color] Part 4128535 ×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.

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