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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.

Optimus Prime Robot & Vehicle

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40803 Optimus Prime Robot & Vehicle

237 pieces in 106 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.

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Piece checklist

Plates 70 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×1
  • Plate 1 x 5 Black Part 78329 Element 6350415 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 4 x 6 Black Part 3032 Element 303226 ×1
  • Plate 6 x 6 Black Part 3958 Element 395826 ×2
  • Plate 1 x 1 Blue Part 3024 Element 302423 1 spare in the box ×2
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×7
  • Plate 1 x 4 Blue Part 3710 Element 371023 ×5
  • Plate 2 x 2 Blue Part 3022 Element 4613973 or 302223 ×4
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1
  • Plate 4 x 4 Blue Part 3031 Element 4243815 or 303123 ×1
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×6
  • Plate 1 x 3 Light Bluish Gray Part 3623 Element 4211429 or 3623194 ×2
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×2
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×1
  • Plate 4 x 4 Light Bluish Gray Part 3031 Element 4243797 or 4211403 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×4
  • Plate 1 x 2 Red Part 3023 Element 302321 ×7
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×3
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate 4 x 4 Red Part 3031 Element 4243814 or 303121 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 1 x 1 Yellow Part 3024 Element 302424 1 spare in the box ×2
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×1

Tiles 47 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×3
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×1
  • Tile 2 x 4 with Groove Black Part 87079 Element 4560182 ×1
  • Tile 1 x 1 with Groove Blue Part 3070b Element 4206330 or 307073 1 spare in the box ×2
  • Tile 1 x 2 with Groove Blue Part 3069b Element 306923 ×2
  • Tile 1 x 4 with Groove Blue Part 2431 Element 243123 ×4
  • Tile 2 x 2 Corner Blue Part 14719 Element 6129747 ×6
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1
  • Tile 2 x 3 Blue Part 26603 Element 6196596 ×1
  • Tile 2 x 4 with Groove Blue Part 87079 Element 4654678 or 4560180 ×2
  • Tile 1 x 2 with Black Grill, Medium Blue/White Shine Print Light Bluish Gray Part 3069bpr9929 Element 6536379 ×1
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×2
  • Tile 1 x 3 with Black Grill, Medium Blue/White Shine Print Light Bluish Gray Part 63864pr0057 Element 6536380 ×2
  • Tile 1 x 6 with Groove Light Bluish Gray Part 6636 Element 4211549 ×1
  • Tile 1 x 1 with Groove Red Part 3070b Element 307021 1 spare in the box ×2
  • Tile 1 x 2 with Bright Light Blue Windows/Mirror, Silver/Black Border Print Red Part 3069bpr9931 Element 6536378 ×4
  • Tile 1 x 2 with White Autotron Symbol Print Red Part 3069bpr9930 Element 6536386 ×2
  • Tile 2 x 2 Corner Red Part 14719 Element 6078641 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×2
  • Tile 2 x 3 with Medium Blue Window/Windscreen Print Red Part 26603pr0100 Element 6536376 ×2
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×2
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×1
  • Tile 1 x 2 with Groove Yellow Part 3069b Element 306924 ×1

Plates Special 39 pieces

  • Plate Special 1 x 1 x 2/3 Half Round with Side Stud Black Part 3386 Element 6424674 ×2
  • Plate Special 1 x 4 with 2 Studs with Groove [New Underside] Black Part 41740 Element 6254045 ×2
  • Plate Special 1 x 4 with Wheels Holder Black Part 2926 Element 6338416 or 292626 ×2
  • Plate Special 2 x 2 with Only 2 studs Black Part 33909 Element 6192346 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted Blue Part 99207 Element 6133720 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Blue Part 15573 Element 6092582 ×2
  • Plate Special 1 x 2 with Clip Horizontal on Side Blue Part 11476 Element 6313131 or 6213381 ×2
  • Plate Special 3 x 2 with Rounded End, Hole Blue Part 3176 Element 317673 or 317623 ×1
  • Bracket 1 x 1 - 1 x 1 Inverted Light Bluish Gray Part 36840 Element 6335328 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Light Bluish Gray Part 4081b Element 6281998 or 4632575 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×2
  • Plate Special 2 x 2 with Only 2 studs Light Bluish Gray Part 33909 Element 6212077 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated Version Light Bluish Gray Part 4304 Element 6469440 ×4
  • Plate Special Round 1 x 1 with Hollow Stud and Horizontal Bar 1L Light Bluish Gray Part 32828 Element 6227897 1 spare in the box ×2
  • Bracket 1 x 2 - 1 x 2 Inverted Red Part 99780 Element 6089698 ×2
  • Bracket 1 x 2 - 2 x 4 Red Part 93274 Element 6118830 or 4616800 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Red Part 15573 Element 6092565 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Red Part 87580 Element 6126048 or 4581308 ×2
  • Plate Special 2 x 2 with Only 2 studs Red Part 33909 Element 6219819 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Half Hollow Anti-stud] - Updated Version Red Part 4304 Element 6469446 ×2

Bricks Special 21 pieces

  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Dark Bluish Gray Part 32952 Element 6228923 ×2
  • Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side Light Bluish Gray Part 22885 Element 6123809 ×11
  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×2
  • Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side Red Part 22885 Element 6135130 ×4
  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side White Part 32952 Element 6552171 or 6548288 ×2

Tiles Round and Curved 14 pieces

  • Tile Round 2 x 2 with White Autotron Logo Print Blue Part 14769pr9960 Element 6568816 ×2
  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×4
  • Tile Round 1 x 1 Half Circle Red Part 24246 Element 6258973 1 spare in the box ×2
  • Tile Round 1 x 1 with Large and Small White Squares Print (Brickheadz Eye) Trans-Light Blue Part 98138pr0060 Element 6536385 1 spare in the box ×4
  • Tile Round 1 x 1 Half Circle Trans-Orange Part 24246 Element 6507959 or 6249116 1 spare in the box ×2

Bricks 9 pieces

  • Brick 2 x 3 Blue Part 3002 Element 300223 ×1
  • Brick 2 x 2 Green Part 3003 Element 300328 ×2
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×1
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 2 without Bottom Tube Trans-Dark Pink Part 3065 Element 6514270 or 6244913 ×2
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×1

Wheels and Tyres 8 pieces

  • Tyre 14 x 9 Smooth Small Wide Slick Black Part 30028 Element 4508215 or 3002826 ×4
  • Wheel 8 x 9 with Hole Notched for Wheels Holder Pin, Re-inforced Back Light Bluish Gray Part 74967 Element 6011375 ×4

Bricks Curved 7 pieces

  • Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs Light Bluish Gray Part 49307 Element 6262085 ×2
  • Brick Curved 1 x 4 x 2/3 Double, No Studs Light Bluish Gray Part 79756 Element 6402876 ×2
  • Brick Curved 2 x 2 x 2/3 Red Part 15068 Element 6105976 ×1
  • Brick Curved Inverted 2 x 2 x 2/3 Red Part 32803 Element 6442314 ×2

Plates Round Curved and Dishes 6 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Blue Part 4032a Element 403223 ×2
  • Plate Round 1 x 1 with Open Stud Light Bluish Gray Part 85861 Element 6168647 or 6124825 1 spare in the box ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×1

Bricks Sloped 5 pieces

  • Brick Sloped 45° 2 x 1 Triple with Inside Stud Holder Blue Part 15571 Element 6249783 or 6179332 ×2
  • Brick Sloped 45° 2 x 1 with 2/3 Inverted Cutout and no stud Blue Part 28192 Element 6228601 ×2
  • Brick Sloped 33° 2 x 2 Double / Inverted Light Bluish Gray Part 1762 Element 6507810 or 6393207 ×1

Tiles Special 5 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Blue Part 15712 Element 6344028 or 6071264 ×2
  • Tile Special 2 x 3 Pentagonal with Light Bluish Grey Surface, Dark Bluish Grey/Black Lines Print Blue Part 22385pr0155 Element 6536375 ×1
  • Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×2

Minifig Accessories 4 pieces

  • Equipment Candlestick Light Bluish Gray Part 37762 Element 6436421 ×2
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Light Bluish Gray Part 64644 Element 4657366 ×2

Minifig Shields, Weapons, & Tools 2 pieces

  • Weapon Spike Flexible 3.5L Blue Part 64727 Element 6529491 or 6270086 ×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

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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.

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