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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.

Sonic: Speedster Lightning

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77117 Sonic: Speedster Lightning

123 pieces in 68 part and color combinations, plus 1 minifigure.

The official piece count includes the 3 parts inside the set's minifigures, which this inventory lists separately. 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 23 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 1 x 1 Blue Part 3024 Element 302423 1 spare in the box ×6
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×2
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×2
  • Plate 2 x 2 Corner Blue Part 2420 Element 242073 or 242023 ×2
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×1
  • Plate 1 x 2 Trans-Light Blue Part 3023 Element 6514007 or 6240222 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×1
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×1
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1

Plates Special 12 pieces

  • Bracket 1 x 2 - 2 x 6 Black Part 6970 Element 6533764 ×1
  • Plate Special 1 x 2 with Door Rail Dark Bluish Gray Part 32028 Element 4543086 or 4541289 ×1
  • Plate Special 1 x 1 x 2/3 Half Round with Side Stud Light Bluish Gray Part 3386 Element 6448793 ×2
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) Red Part 18674 Element 6132541 ×1
  • Bracket 1 x 1 - 1 x 2 Inverted White Part 73825 Element 6548292 or 6337079 ×2
  • Bracket 1 x 2 - 1 x 2 Inverted White Part 99780 Element 6548278 or 6070698 ×2
  • Plate Special, 1 x 1 Stud with 3 x 3 Ring on Top Yellow Part 3917 Element 6508325 or 6441692 ×3

Bricks Wedged 9 pieces

  • Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Black Part 45677 Element 4191191 ×1
  • Brick Wedged, Curved 1 x 4 with Stud Notch Left Blue Part 5415 Element 6558916 ×2
  • Brick Wedged, Curved 1 x 4 with Stud Notch Right Blue Part 5414 Element 6558857 ×2
  • Brick Wedged, Curved 2 x 1 with Stud Notch Left Blue Part 29120 Element 6172414 ×2
  • Brick Wedged, Curved 2 x 1 with Stud Notch Right Blue Part 29119 Element 6172411 ×2

Bricks Sloped 8 pieces

  • Brick Sloped 18° 2 x 1 x 2/3 Blue Part 5404 Element 6513920 or 6485125 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Blue Part 54200 Element 4504380 or 4296154 2 spares in the box ×4
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 1 spare in the box ×2

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 2 spares in the box ×4
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×1
  • Dish 2 x 2 Inverted [Radar] Trans-Clear Part 4740 Element 6514246 or 6245306 ×3

Tiles Special 8 pieces

  • Tile 1 x 2 with Stud Notch Left Black Part 5091 Element 6510125 or 6458187 ×1
  • Tile 1 x 2 with Stud Notch Right Black Part 5092 Element 6510139 or 6458188 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×3
  • Tile Special 2 x 3 Pentagonal Blue Part 22385 Element 6245248 or 6128871 ×1
  • Tile 1 x 2 with Stud Notch Left White Part 5091 Element 6510126 or 6477744 ×1
  • Tile 1 x 2 with Stud Notch Right White Part 5092 Element 6510140 or 6477750 ×1

Wheels and Tyres 8 pieces

  • Tyre 24 x 12 Low Profile Black Part 18977 Element 6102596 ×4
  • Wheel 18 x 12 with Pin Hole and Stud Red Part 66727 Element 6588067 ×4

Transportation - Land 7 pieces

  • Wheel Arch, Mudguard 4 x 2 1/2 x 1 Blue Part 98282 Element 6585089 ×2
  • Wheel Arch, Mudguard 4 x 2 x 2 1/2 Blue Part 35789 Element 6517350 or 6219820 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Light Bluish Gray Part 3829c01 Element 4226995 ×1
  • Grille / Spoiler with 1 x 2 Plate, 2 x 2 Anti-studs (Racers Car) White Part 50949 Element 6249277 ×1
  • Vehicle Base 6 x 12 x 3/4 with 4 x 2 Recessed Center with Smooth Underside White Part 28324 Element 6538019 or 6259271 ×1

Tiles 6 pieces

  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×1
  • Tile 2 x 2 with Groove Dark Bluish Gray Part 3068b Element 4211055 ×1
  • Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×1
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

Bricks Curved 5 pieces

  • Brick Curved 4 x 1 Double, No Studs Dark Bluish Gray Part 93273 Element 4648256 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Trans-Red Part 11477 Element 6508252 or 6468878 ×2
  • Brick Curved, 3 x 1 with 1/3 Inverted Cutout White Part 70681 Element 6615523 or 6357598 ×2

Tiles Round and Curved 5 pieces

  • Tile 2 x 2 Curved, Macaroni Blue Part 27925 Element 6194724 ×2
  • Tile Round 1 x 2 Half Circle Blue Part 1748 Element 6585088 1 spare in the box ×1
  • Tile Round 1 x 1 Quarter Trans-Light Blue Part 25269 Element 6514467 or 6396287 1 spare in the box ×2

Plates Wedged 4 pieces

  • Wedge Plate 2 x 2 Cut Corner Blue Part 26601 Element 6390153 ×2
  • Wedge Plate 2 x 2 Left White Part 24299 Element 6552156 or 6132203 ×1
  • Wedge Plate 2 x 2 Right White Part 24307 Element 6552157 or 6132204 ×1

Technic Bricks 4 pieces

  • Technic Brick Special 1 x 2 with Pin Hole and 1 x 2 Plate Red Part 73109 Element 6385920 ×4

Technic Pins 4 pieces

  • Technic Pin without Friction Ridges Lengthwise Yellow Part 3673 Element 6331822 1 spare in the box ×4

Panels 3 pieces

  • Panel 1 x 3 x 1 Black Part 23950 Element 6382491 ×2
  • Panel 1 x 2 x 1 [Rounded Corners] Trans-Light Blue Part 4865b Element 6514122 or 6246890 ×1

Bricks 2 pieces

  • Brick 1 x 4 Black Part 3010 Element 301026 ×2

Bricks Round and Cones 2 pieces

  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×2

Bricks Special 2 pieces

  • Brick Special 1 x 2 Palisade [aka Log] Dark Bluish Gray Part 30136 Element 4211095 ×2

Hinges, Arms and Turntables 2 pieces

  • Hinge Brick 1 x 2 Base Blue Part 3937 Element 393723 ×1
  • Hinge Brick 2 x 2 Top Plate Thin White Part 6134 Element 6548272 or 4612342 ×1

Rock 1 piece

  • Rock 1 x 1 Jewel / Gem 24 Facet Trans-Green Part 30153 Element 6513970 or 6247788 1 spare in the box ×1

Minifigures 1 figure

  • Sonic, Open Mouth Smile Minifigure, checked as a whole figure ×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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