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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.

ROBOLAB Intelligent House Building Set

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9795 ROBOLAB Intelligent House Building Set

164 pieces in 85 part and color combinations.

LEGO counts 156 pieces. This inventory comes from a separate parts catalog and lists 164; 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

Bricks 32 pieces

  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×2
  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×1
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×11
  • Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges White Part 2454a ×7
  • Brick 1 x 3 x 5 with Side Supports White Part 3755a Element 375501 ×5
  • Brick 1 x 8 White Part 3008 Element 6550134 or 300801 ×2
  • Brick 2 x 2 Corner White Part 2357 Element 6552088 or 6548253 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×1

Plates 22 pieces

  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 2 x 12 Black Part 2445 Element 244526 ×5
  • Plate 2 x 16 Black Part 4282 Element 428276 or 428226 ×1
  • Plate 2 x 6 Black Part 3795 Element 379526 ×3
  • Plate 1 x 2 Red Part 3023 Element 302321 ×1
  • Plate 1 x 8 Red Part 3460 Element 346021 ×1
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 2 x 3 Red Part 3021 Element 302121 ×1
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×1
  • Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 ×2

Bricks Sloped 14 pieces

  • Brick Sloped 33° 3 x 3 Black Part 4161 Element 416126 ×8
  • Brick Sloped 33° 3 x 3 Double Convex Black Part 3675 Element 367526 ×2
  • Brick Sloped 33° 3 x 4 Black Part 3297 Element 6435854 or 329726 ×2
  • Brick Sloped 33° 3 x 1 Red Part 4286 Element 428621 ×2

Technic Bricks 11 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×2
  • Technic Brick 1 x 10 [9 Pin Holes] White Part 2730 Element 273001 ×2
  • Technic Brick 1 x 12 [11 Pin Holes] White Part 3895 Element 6332157 or 6215045 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] White Part 3894 Element 389401 ×1
  • Technic Brick 1 x 8 [7 Pin Holes] White Part 3702 Element 4582543 or 370201 ×1

Electronics 10 pieces

  • Wire with Brick 2 x 2 x 2/3 Pair, 162L Black Part 5306bc162 Element 75656 ×2
  • Wire with Brick 2 x 2 x 2/3 Pair, 69L Black Part 5306bc069 Element 75782 ×1
  • Sensor, Light with Fixed Cable Blue Part 2982c01 Element 4119421 ×1
  • Motor Pulley, 9V Micromotor with axle hole Light Gray Part 2983 Element 298630 ×2
  • Motor Cover, 9V Micromotor 2 x 2 Red Part 2984 Element 4109831 or 298421 ×1
  • Motor Cover, 9V Micromotor 2 x 2 Base Red Part 2985 Element 4109830 or 298521 ×1
  • Motor, 9V Micromotor 2 x 2 Red Part 2986 Element 70823 ×1
  • Light Brick 1 x 2 with Single Side Light White Part 6035 Element 4603220 or 74880 ×1

Wheels and Tyres 9 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×4
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×1
  • Wheel 8 x 6 Yellow Part 4624 Element 6133542 or 462424 ×4

Plates Special 7 pieces

  • Bracket 2 x 2 - 2 x 2 Black Part 3956 Element 6254808 or 6019217 ×1
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×4
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Red Part 2444 Element 244421 ×2

Technic Axles 5 pieces

  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×1
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×1

Technic Special 5 pieces

  • Technic Cable Holder White Part 70376 Element 70376 ×5

Tiles 5 pieces

  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1
  • Tile 2 x 2 with Groove Light Gray Part 3068b Element 306802 ×1
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1

Hinges, Arms and Turntables 4 pieces

  • Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs] Black Part 4275b Element 427526 ×2
  • Hinge Tile 1 x 2 1/2 with 2 Fingers on Top Black Part 4531 Element 453126 ×2

Plates Round Curved and Dishes 4 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×2
  • Dish 2 x 2 x 2/3 Light Reflector Chrome Silver Part 71128 Element 71128 ×1
  • Dish 4 x 4 Inverted [Radar] White Part 3960 Element 396001 ×1

Technic Bushes 4 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×4

Technic Gears 4 pieces

  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×2
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Gray Part 3650c Element 365002 ×1
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 1 spare in the box ×1

Technic Pins 4 pieces

  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×4

Transportation - Land 4 pieces

  • Vehicle Base 4 x 7 x 2/3 with 3 x 4 Recessed, Wheel Pins Black Part 2441 Element 6482877 or 6349350 ×1
  • Steering Stand 1 x 2 with Black Steering Wheel Red Part 3829c01 Element 9552 ×1
  • Wheel Arch, Mudguard 2 x 4 Studded Red Part 3788 Element 378821 ×1
  • Wheel Arch, Mudguard, Slope 3 x 4 Red Part 2513 Element 251321 ×1

Windows and Doors 3 pieces

  • Door 1 x 4 x 5 Left with Trans-Clear Glass Red Part 47899c01 Element 73436 ×1
  • Window 4 x 4 x 3 Roof with Centre Bar Red Part 6159 Element 75380 ×2

Gear Parts 2 pieces

  • Storage Bin, Dacta, Small Black Part upn0032 ×1
  • Storage Bin Lid, Dacta, 19 x 24 Trans-Clear Part 71082 ×1

Minifig Headwear 2 pieces

  • Hair Ponytail Black Part 6093 Element 609376 or 609326 ×1
  • Hair Smooth Black Part 3901 Element 390176 or 390126 ×1

String, Bands and Reels 2 pieces

  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×2

Technic Connectors 2 pieces

  • Technic Axle Connector Ridged [with x Hole x Orientation] Light Gray Part 6538b Element 4113804 or 4100408 ×1
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Yellow Part 6553 Element 655324 ×1

Transportation - Sea and Air 2 pieces

  • Propeller 2 Blade 9 Diameter Light Gray Part 2952 Element 4107163 ×2

Baseplates 1 piece

  • Baseplate 16 x 32 Green Part 3857 Element 4219615 or 274828 ×1

Bricks Round and Cones 1 piece

  • Brick Round 2 x 2 with Axle Hole Black Part 3941 Element 614376 or 614326 ×1

Minifig Heads 1 piece

  • Minifig Head Standard Grin Print [Blocked Open Stud] Yellow Part 3626bpr0001 Element 6020398 ×1

Minifig Lower Body 1 piece

  • Hips and Red Legs Red Part 970c22 Element 6006024 or 4582576 ×1

Minifig Upper Body 1 piece

  • Torso, White Arms, Yellow Hands [Plain] White Part 973c27h01 Element 6038496 or 4275461 ×1

Panels 1 piece

  • Panel 1 x 2 x 1 [Square Corners] Red Part 4865a ×1

Plants & Trees 1 piece

  • Plant, Bush 2 x 2 x 4 Green Part 6064 Element 6269009 or 606428 ×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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