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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.

Street Chopper / Trike

Checking

8857 Street Chopper / Trike

378 pieces in 98 part and color combinations.

LEGO counts 409 pieces. This inventory comes from a separate parts catalog and lists 378; 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

Plates 67 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×21
  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 1 x 6 Black Part 3666 Element 366626 ×5
  • Plate 2 x 2 Black Part 3022 Element 302226 ×8
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×5
  • Plate 1 x 3 Blue Part 3623 Element 362323 ×4
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×1
  • Plate 1 x 6 Blue Part 3666 Element 366623 ×2
  • Plate 2 x 3 Blue Part 3021 Element 302123 ×1
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 4 x 4 Blue Part 3031 Element 4243815 or 303123 ×1
  • Plate 6 x 6 Blue Part 3958 Element 4199519 or 395823 ×1
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×3
  • Plate 1 x 6 Light Gray Part 3666 Element 366602 ×1
  • Plate 2 x 6 Red Part 3795 Element 379521 ×1
  • Plate 2 x 8 Red Part 3034 Element 303421 ×1
  • Plate 4 x 6 Red Part 3032 Element 303221 ×2

Technic Bushes 54 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×16
  • Technic Bush 1/2 Toothed Type II [X Opening] Light Gray Part 4265b Element 4100501 or 657702 1 spare in the box ×38

Technic Pins 38 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×26
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×6
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×2
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 ×4

Technic Bricks 36 pieces

  • Technic Brick 1 x 1 with Pin Hole Black Part 6541 Element 654126 ×4
  • Technic Brick 1 x 10 [9 Pin Holes] Black Part 2730 Element 273026 ×4
  • Technic Brick 1 x 12 [11 Pin Holes] Black Part 3895 Element 389526 ×4
  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×7
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×5
  • Technic Brick 1 x 8 [7 Pin Holes] Black Part 3702 Element 370226 ×2
  • Technic Brick 1 x 1 with Pin Hole Light Gray Part 6541 Element 654102 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Light Gray Part 3700 Element 370002 ×1
  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×2

Technic Axles 33 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×2
  • Technic Axle 2 Black Part 3704 Element 370426 ×8
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×8
  • Technic Axle 6 Black Part 3706 Element 370626 ×5
  • Technic Axle 8 Black Part 3707 Element 370726 ×8

Technic Special 25 pieces

  • Technic Link Black Part 3711a Element 371126 1 spare in the box ×20
  • Technic Plate 1 x 4 with Toothed Ends Black Part 4263 Element 4251466 or 4225509 ×2
  • Technic Plate 1 x 8 with Toothed Ends Black Part 4442 Element 444276 or 444226 ×1
  • Technic Plate 1 x 4 with Toothed Ends Red Part 4263 Element 426371 or 426321 ×2

Technic Steering, Suspension and Engine 24 pieces

  • Technic Motorcycle Pivot Black Part 2904 Element 6181757 or 4543263 ×1
  • Technic Steering Rack Top - Modified 1 x 8 Technic Plate with Toothed Ends Black Part 2792 Element 279226 ×1
  • Technic Engine Piston Round Dark Gray Part 2851 Element 4160859 or 285127 ×4
  • Technic Engine Connecting Rod Light Gray Part 2852 Element 285202 ×4
  • Technic Engine Crankshaft Light Gray Part 2853 Element 4119475 or 285302 ×4
  • Technic Engine Crankshaft Center Light Gray Part 2854 Element 285402 ×1
  • Technic Engine Cylinder with Side Slots Light Gray Part 2850a ×4
  • Technic Shock Absorber 6.5L with Soft Spring, Standard Coil [Complete Assembly] Light Gray Part 76138 ×1
  • Technic Steering Arm Light Gray Part 4261 Element 4225506 or 4189316 ×2
  • Technic Steering Gear Holder Light Gray Part 2791 Element 279002 ×1
  • Technic Steering Rack Light Gray Part 2790 Element 4143357 or 279102 ×1

Technic Connectors 20 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Light Gray Part 6553 Element 655302 ×4
  • Technic Axle Connector Ridged [with + Hole + Orientation] Light Gray Part 6538a ×4
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×4
  • Technic Axle and Pin Connector Toggle Joint Toothed [with Slots] Light Gray Part 4273b Element 427302 ×8

Technic Beams 16 pieces

  • Technic Beam 1 x 4 Thin with Stud Connector Black Part 2825 Element 6331570 or 4107136 ×8
  • Technic Beam Triangle Thin [Type I] Black Part 2905 Element 4142543 or 290526 ×2
  • Technic Beam 1 x 4 Thin with Stud Connector Light Gray Part 2825 Element 4107133 or 282502 ×2
  • Technic Beam 1 x 4 Thin with Stud Connector Red Part 2825 Element 6392956 or 4227649 ×4

Hinges, Arms and Turntables 14 pieces

  • Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs Blue Part 4276b Element 4238854 or 4114247 ×2
  • Hinge Plate 1 x 2 with 3 Fingers On Side Blue Part 2452 Element 4239013 or 4112883 ×2
  • Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs Red Part 4276b Element 4238277 or 427621 ×4
  • Hinge Plate 1 x 2 with 3 Fingers On Side Red Part 2452 Element 4239012 or 245221 ×4
  • Hinge Plate 1 x 6 with 2 and 3 Fingers On Ends Red Part 4504 Element 4246942 or 450421 ×2

Plates Special 13 pieces

  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×2
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×1
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Light Gray Part 4081b Element 408102 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Red Part 2444 Element 244421 ×4

Wheels and Tyres 10 pieces

  • Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 1 spare in the box ×2
  • Tyre 81.6 x 15 Motorcycle Black Part 2902 Element 6226880 or 4562873 ×1
  • Tyre 81.6 x 34 ZR Technic Straight Tread Black Part 2997 Element 299726 ×2
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×2
  • Wheel 61.6 x 13.6 Motorcycle White Part 2903 Element 290301 ×1
  • Wheel 81.6 x 34 Six Spoke White Part 2998 Element 299801 ×2

Technic Gears 9 pieces

  • Technic Gear 14 Tooth Bevel Light Gray Part 4143 Element 414352 or 414302 ×4
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×1
  • Technic Gear 24 Tooth [Old Style - Three axle holes] Light Gray Part 3648a ×1
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 ×2
  • Technic Gear Differential [Old Style, 28 Teeth] Light Gray Part 73071 ×1

Plates Round Curved and Dishes 6 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×1

Bricks Sloped 4 pieces

  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper Black Part 4287a ×2
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×2

Plates Wedged 4 pieces

  • Wedge Plate 3 x 3 Cut Corner Red Part 2450 Element 245021 ×4

Plants & Trees 2 pieces

  • Plant, Palm Tree Trunk - Short Connector, Axle Hole with 4 Inside Prongs Light Gray Part 2536c ×2

Tubes and Hoses 2 pieces

  • Flexible Hose 8.5L with Tabless Ends Black (Ends different color than Tube) Yellow Part 73590c01b ×2

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Black Grid Large Print White Part 4150pr0014 Element 81571 ×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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