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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.

Technology Resource Set

Checking

9649 Technology Resource Set

1,154 pieces in 105 part and color combinations.

LEGO counts 1,110 pieces. This inventory comes from a separate parts catalog and lists 1,154; 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

Technic Special 168 pieces

  • Technic Link Black Part 3711a Element 371126 ×156
  • Technic Plate 1 x 5 with Smooth Ends, 4 Studs and Centre Axle Hole Blue Part 32124 Element 6280384 or 4112874 ×4
  • Technic Cam Light Gray Part 6575 Element 657502 ×6
  • Technic Gearbox 2 x 4 x 3 1/3 Yellow Part 6588 Element 658824 ×2

Technic Pins 147 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×39
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 ×27
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 ×15
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×39
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×27

Technic Gears 124 pieces

  • Technic Worm Gear Black Part 4716 Element 6037533 or 471626 ×12
  • Technic Gear Differential, 24 -16 Tooth with Clutch on Both Sides Dark Gray Part 6573 Element 657327 ×2
  • Technic Gear 40 Tooth Green Part 3649 Element 4120109 ×6
  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×24
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×12
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Gray Part 3650c Element 365002 ×12
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Light Gray Part 3648b Element 4107543 or 364802 ×12
  • Technic Gear 40 Tooth Light Gray Part 3649 Element 364902 ×6
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×18
  • Technic Gear Rack 1 x 4 Light Gray Part 3743 Element 374302 ×12
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Red Part 3648b Element 4142825 ×6
  • Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray Center White Part 76019 Element 4270486 ×2

Technic Bushes 90 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×63
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×27

Technic Axles 79 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×8
  • Technic Axle 12 Black Part 3708 Element 370826 ×8
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×15
  • Technic Axle 4 Black Part 3705 Element 370526 ×8
  • Technic Axle 6 Black Part 3706 Element 370626 ×8
  • Technic Axle 8 Black Part 3707 Element 370726 ×8
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×8
  • Technic Axle 3 Light Gray Part 4519 Element 4186007 ×8
  • Technic Axle 5 Light Gray Part 32073 Element 4141482 ×8

Technic Bricks 78 pieces

  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Green Part 32064b ×10
  • Technic Brick 1 x 12 [11 Pin Holes] Red Part 3895 Element 389521 ×8
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×16
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×20
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×8
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×8
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×8

Technic Connectors 74 pieces

  • Technic Axle and Pin Connector Angled #1 Blue Part 32013 Element 6332570 or 4107797 ×10
  • Technic Axle and Pin Connector Angled #3 - 157.5° Blue Part 32016 Element 6261397 or 6177396 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Blue Part 32014 Element 4112205 ×4
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Light Gray Part 6553 Element 655302 ×16
  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Gray Part 6538b Element 4113804 or 4100408 ×8
  • Technic Axle Connector with Axle Hole Light Gray Part 32039 Element 4106469 ×10
  • Technic Axle and Pin Connector Angled #2 - 180° Light Gray Part 32034 Element 4107830 ×4
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Gray Part 32015 Element 4106378 ×4
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×10
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Light Gray Part 32068 Element 4114669 ×4

Plates 64 pieces

  • Plate 1 x 10 Blue Part 4477 Element 447723 ×8
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×20
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×10
  • Plate 1 x 8 Blue Part 3460 Element 346023 ×4
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×4
  • Plate 6 x 8 Green Part 3036 Element 4507311 or 303678 ×4
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×10
  • Plate 6 x 14 Red Part 3456 Element 4179193 or 345621 ×4

Wheels and Tyres 60 pieces

  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×4
  • Tyre 20 x 30 Balloon Medium 49.6 x 20 Black Part 6581 Element 658126 ×4
  • Tyre 30 x 10.5 Offset Tread Black Part 2346 Element 234676 or 234626 ×8
  • Tyre 43 x 17 Black Part 3634 Element 4523564 or 363426 ×4
  • Tyre Offset Tread 24 x 8 Black Part 3483 Element 4501048 or 348326 ×4
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×12
  • Wheel 20 x 30 Balloon Medium White Part 6582 Element 4193785 or 658201 ×4
  • Wheel with Split Axle hole Yellow Part 3482 Element 348224 ×20

Bricks 52 pieces

  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×28
  • Brick 2 x 4 Red Part 3001 Element 300121 ×22
  • Brick 2 x 8 Red Part 3007 Element 6036408 or 300721 ×2

Plates Special 50 pieces

  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×4
  • Bracket 2 x 2 - 2 x 2 Blue Part 3956 Element 6019215 or 395623 ×10
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Blue Part 3794a ×4
  • Technic Plate 2 x 4 [3 Holes] Blue Part 3709 Element 370923 ×8
  • Technic Plate 2 x 8 [7 Holes] Blue Part 3738 Element 373823 ×8
  • Plate Special 1 x 2 with Door Rail Light Gray Part 32028 Element 4109642 ×10
  • Plate Special 2 x 2 with 2 Pin Holes Light Gray Part 2817 Element 281702 ×6

Technic Beams 40 pieces

  • Technic Beam 1 x 9 Bent (6 - 4) Thick Black Part 6629 Element 6279881 or 4119800 ×6
  • Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin Blue Part 32250 Element 6371955 or 6339225 ×10
  • Technic Beam 1 x 3 Thin Light Gray Part 6632 Element 4107825 ×6
  • Technic Beam 1 x 4 Thin with Stud Connector Light Gray Part 2825 Element 4107133 or 282502 ×6
  • Technic Beam 1 x 5 Thin Light Gray Part 32017 Element 4106885 ×6
  • Technic Beam 1 x 11.5 Double Bent Thick Yellow Part 32009 Element 6271150 or 6257104 ×6

Plates Round Curved and Dishes 30 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×10
  • Dish 2 x 2 x 2/3 Light Reflector Chrome Silver Part 71128 Element 71128 ×6
  • Dish 4 x 4 Inverted [Radar] White Part 3960 Element 396001 ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×10

Tiles 24 pieces

  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×6
  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×6
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×6
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×6

String, Bands and Reels 20 pieces

  • Technic Reel 3 x 2 Blue Part 32012 Element 4107179 ×2
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×6
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Red Part 85545 ×6
  • Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×6

Technic Steering, Suspension and Engine 16 pieces

  • Technic Engine Crankshaft Center Light Gray Part 2854 Element 285402 ×6
  • Technic Steering Pulley Large Light Gray Part 3736 Element 373602 ×4
  • Technic Universal Joint 4L [Complete Assembly] Light Gray Part 9244 Element 9244 ×6

Electronics 12 pieces

  • Motor Pulley, 9V Micromotor with axle hole Light Gray Part 2983 Element 298630 ×12

Hinges, Arms and Turntables 12 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×6
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×6

Tubes and Hoses 6 pieces

  • Axle Hose, Soft 14L Yellow Part 32201 Element 4189229 or 4124026 ×6

Bricks Special 2 pieces

  • Brick Special 2 x 6 x 2 Weight with Sealed Bottom and Dimples on Ends Black Part 73090b Element 6094053 or 73843 ×2

Gear Parts 2 pieces

  • Storage / Sorting Tray, Eight Compartment Dark Gray Part 4188023 ×1
  • Storage / Sorting Tray, Six Compartment Dark Gray Part 4186302 ×1

Supports, Girders and Cranes 2 pieces

  • Hook, Technic - Large Black Part 70496 Element 70644 ×2

Tools 2 pieces

  • Brick Separator v1.0 Dark Gray Part 6007 Element 600727 ×2

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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