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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.

Yellow Racers

Checking

31023 Yellow Racers

328 pieces in 119 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 93 pieces

  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 2 x 12 Black Part 2445 Element 244526 ×5
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 1 x 2 Dark Blue Part 3023 Element 6554191 or 4528981 ×4
  • Plate 1 x 6 Dark Blue Part 3666 Element 4508313 or 4177734 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×5
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 ×7
  • Plate 2 x 8 Dark Bluish Gray Part 3034 Element 4210997 ×2
  • Plate 1 x 4 Light Bluish Gray Part 3710 Element 4211445 ×3
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×2
  • Plate 2 x 14 Light Bluish Gray Part 91988 Element 4662161 ×1
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×5
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×2
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×3
  • Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 1 spare in the box ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×4
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×4
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate 1 x 1 Yellow Part 3024 Element 302424 1 spare in the box ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×12
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×10
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×4
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×2
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×1

Plates Special 56 pieces

  • Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×5
  • Plate Special 1 x 2 with Door Rail Black Part 32028 Element 4107761 ×4
  • Plate Special 1 x 2, Top Clip [Split] Black Part 92280 Element 4598528 ×7
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Dark Bluish Gray Part 92593 Element 4598769 ×1
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×4
  • Plate Special 1 x 2 [Side Handle Closed Ends] Light Bluish Gray Part 48336 Element 4244627 ×6
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Light Bluish Gray Part 60470b Element 6337268 or 4556157 ×5
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Light Bluish Gray Part 60478 Element 4515369 ×8
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×1
  • Plate Special 1 x 2 Side Handle [Free Ends] Red Part 2540 Element 4140585 or 254021 ×1
  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×4
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Yellow Part 3794b Element 379424 ×3
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Yellow Part 60478 Element 4515367 ×2
  • Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Yellow Part 10247 Element 6061025 ×3

Plates Round Curved and Dishes 25 pieces

  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×14
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 ×4
  • Dish 4 x 4 Inverted [Radar] Light Bluish Gray Part 3960 Element 4211664 ×1
  • Plate Round 4 x 4 with Pin Hole Light Bluish Gray Part 60474 Element 4515351 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Orange Part 6141 Element 6240218 or 3005747 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×1

Tiles 24 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×4
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×4
  • Tile 1 x 6 with Groove Dark Blue Part 6636 Element 4252437 ×2
  • Tile 1 x 2 with Red 82, Yellow and White Gauges Print Light Bluish Gray Part 3069bpr0101 Element 4227776 ×1
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×4
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×6
  • Tile 1 x 4 with Groove Yellow Part 2431 Element 243124 ×3

Bricks Sloped 21 pieces

  • Brick Sloped 18° 4 x 2 Black Part 30363 Element 4185583 ×2
  • Brick Sloped 30° 1 x 2 x 2/3 Black Part 85984 Element 4548180 ×2
  • Brick Sloped 45° 2 x 2 Dark Blue Part 3039 Element 4153653 ×1
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Dark Bluish Gray Part 61409 Element 4540386 or 4521185 ×2
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Light Bluish Gray Part 3747b Element 4211570 ×1
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Yellow Part 61409 Element 4540384 or 4521167 ×4
  • Brick Sloped 18° 4 x 1 Yellow Part 60477 Element 4656699 or 4515361 ×2
  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Yellow Part 15672 Element 6069170 or 6018491 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Yellow Part 3040b Element 4121965 or 304024 ×3
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×2

Bricks 18 pieces

  • Brick 1 x 2 Dark Blue Part 3004 Element 4249891 ×1
  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×2
  • Brick 1 x 3 Light Bluish Gray Part 3622 Element 4211428 ×2
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×1
  • Brick 2 x 4 Red Part 3001 Element 300121 ×1
  • Brick 1 x 1 Yellow Part 3005 Element 300524 ×2
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×2
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×1
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×2
  • Brick 2 x 4 Yellow Part 3001 Element 300124 ×2

Wheels and Tyres 14 pieces

  • Tyre 14 x 4 Smooth Small Single [New Style] Black Part 59895 Element 4516843 or 4507700 1 spare in the box ×1
  • Tyre 17.5 x 6 with Shallow Staggered Treads and Middle Band Black Part 92409 Element 4617848 ×2
  • Tyre 30.4 x 14 VR Solid Black Part 58090 Element 6601610 or 4550937 ×4
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×2
  • Wheel 18mm x 14mm with Axle Hole, Fake Bolts and Shallow Spokes Light Bluish Gray Part 55982 Element 4490127 ×4
  • Wheel Centre Small with Stub Axles (Pulley Wheel) White Part 3464 Element 4296997 ×1

Bricks Curved 13 pieces

  • Brick Curved 2 x 2, Two Top Studs Black Part 30165 Element 4200023 or 4113231 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Light Bluish Gray Part 11477 Element 6028813 ×4
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×4
  • Brick Curved 2 x 2, Two Top Studs Yellow Part 30165 Element 4187061 or 4181838 ×4

Plates Wedged 13 pieces

  • Wedge Plate 2 x 4 Black Part 51739 Element 4531412 ×2
  • Wedge Plate 3 x 2 Left Black Part 43723 Element 4180536 ×1
  • Wedge Plate 3 x 2 Right Black Part 43722 Element 4180508 ×1
  • Wedge Plate 6 x 3 Left White Part 54384 Element 4287708 ×1
  • Wedge Plate 6 x 3 Right White Part 54383 Element 4287707 ×1
  • Wedge Plate 3 x 2 Left Yellow Part 43723 Element 4179095 ×3
  • Wedge Plate 3 x 2 Right Yellow Part 43722 Element 4179094 ×3
  • Wedge Plate 4 x 4 with 2 x 2 Cutout Yellow Part 43719 Element 6609418 or 6275404 ×1

Tiles Special 11 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Dark Blue Part 2412b Element 6022579 or 4507076 ×2
  • Tile Special 1 x 2 with Handle Dark Bluish Gray Part 2432 Element 4211039 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Red Part 2412b Element 241221 1 spare in the box ×2
  • Tile Special 1 x 2 with Handle Red Part 2432 Element 243221 ×1

Technic Pins 7 pieces

  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×1
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

Bricks Special 6 pieces

  • Brick Special 1 x 1 with Headlight Light Bluish Gray Part 4070 Element 4211476 ×4
  • Brick Special 1 x 2 with 2 Studs on 1 Side Red Part 11211 Element 6019155 ×2

Bricks Wedged 4 pieces

  • Brick Wedged, Sloped 4 x 2 Triple Left Yellow Part 43710 Element 6307257 or 6056679 ×2
  • Brick Wedged, Sloped 4 x 2 Triple Right Yellow Part 43711 Element 6307259 or 6056681 ×2

Panels 4 pieces

  • Panel 1 x 1 x 1 Corner Dark Bluish Gray Part 6231 Element 6025235 or 4519967 ×4

Technic Bricks 4 pieces

  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Light Bluish Gray Part 32064b ×2

Technic Connectors 4 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×2
  • Technic Axle and Pin Connector Angled #1 Light Bluish Gray Part 32013 Element 6296859 or 4211550 ×2

Technic Axles 3 pieces

  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×2

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 ×2

Hinges, Arms and Turntables 2 pieces

  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×1
  • Turntable 2 x 2 Plate - Top Light Bluish Gray Part 3679 Element 4540203 or 4495467 ×1

Bars, Ladders and Fences 1 piece

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×1

Transportation - Land 1 piece

  • Wheel Holder 2 x 2 Thin with Clips, Plane Single Light Bluish Gray Part 2415 Element 6321198 or 4211351 ×1

Transportation - Sea and Air 1 piece

  • Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Black Part 2479 Element 247926 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 7 x 4 x 2 Round with Handle Trans-Brown Part 92279 Element 6337336 or 6245235 ×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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