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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.

Side Rider 55

Checking

8668 Side Rider 55

110 pieces in 46 part and color combinations.

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.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

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Piece checklist

Plates 15 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×1
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×2
  • Plate 4 x 4 Blue Part 3031 Element 4243815 or 303123 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×3
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 ×2
  • Plate 1 x 6 Light Bluish Gray Part 3666 Element 4211438 ×2

Bricks Sloped 8 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Red Part 54200 Element 6245252 or 4244363 ×4

Hinges, Arms and Turntables 8 pieces

  • Hinge Plate 1 x 2 Locking with 1 Finger On End, with Groove Black Part 44301a Element 4183043 ×4
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Dark Bluish Gray Part 44302a Element 4210884 ×4

Plates Special 8 pieces

  • Bracket 1 x 2 - 2 x 2 Black Part 44728 Element 6117973 or 6048855 ×4
  • Technic Plate 2 x 4 [3 Holes] Blue Part 3709 Element 370923 ×4

Technic Pins 8 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×4
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×4

Wheels and Tyres 8 pieces

  • Tyre 30.4 x 14 VR Black Part 6578 Element 4561806 or 657826 ×4
  • Wheel Rim 24 x 14 VR with Center Axle Hole White Part 2994 Element 4496671 or 299401 ×4

Tiles 7 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×4
  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×1

Bricks Curved 6 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 ×2
  • Brick Curved 2 x 2 with Lip, No Studs Blue Part 30602 Element 4171849 ×2
  • Brick Curved 6 x 1 Dark Bluish Gray Part 42022 Element 6058858 or 4210778 ×2

Plates Round Curved and Dishes 6 pieces

  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box ×2

Technic Bricks 6 pieces

  • Technic Brick 1 x 8 [7 Pin Holes] Black Part 3702 Element 370226 ×2
  • Technic Brick 1 x 1 with Pin Hole Blue Part 6541 Element 4119014 ×4

Bricks 5 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 Also in Dark Bluish Gray ×2
  • Brick 1 x 4 Black Part 3010 Element 301026 ×1
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 Also in Black ×2

Bricks Wedged 4 pieces

  • Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Blue Part 47456 Element 6529492 or 6143424 ×2
  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Blue Part 45677 Element 6055328 or 4193072 ×2

Technic Bushes 4 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×4

Tiles Special 4 pieces

  • Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 1 spare in the box ×2

Bricks Special 3 pieces

  • Brick Special 1 x 4 with 4 Studs on One Side Blue Part 30414 Element 4212411 or 4141768 ×3

Plates Wedged 2 pieces

  • Wedge Plate 4 x 2 Left Blue Part 41770 Element 6430083 or 4161330 ×1
  • Wedge Plate 4 x 2 Right Blue Part 41769 Element 6430076 or 4160867 ×1

Technic Axles 2 pieces

  • Technic Axle 8 Black Part 3707 Element 370726 ×2

Technic Connectors 2 pieces

  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×2

Tubes and Hoses 2 pieces

  • Hose, Ribbed 7mm D. 4L / 3.2cm Pearl Light Gray Part 78c04 Element 4495200 or 4275389 ×2

Mechanical 1 piece

  • Flywheel Inertia Motor 9 x 4 x 3 2/3 Black Part 54802 Element 4285905 ×1

Stickers 1 piece

  • Sticker Sheet for Set 8668-1 [No Color/Any Color] Part 54397 Element 4286071 ×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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