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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.

Formula E Porsche 99X Electric

Checking

42137 Formula E Porsche 99X Electric

422 pieces in 96 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

Black 215 pieces

  • Axle Hose, Soft 12L Black Part 32200 Element 4501290 or 4121647 ×1
  • Technic Axle 16 Black Part 50451 Element 6317564 or 6043747 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×6
  • Technic Axle Connector Double Flexible [Rubber] Black Part 45590 Element 4198367 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Black Part 59443 Element 6084612 or 4512363 ×4
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×7
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×2
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×7
  • Technic Axle and Pin Connector Perpendicular Double Split [Reinforced] Black Part 69819 Element 6349281 ×6
  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×2
  • Technic Beam 1 x 11 Thick with Alternating Holes Black Part 73507 Element 6330585 ×1
  • Technic Beam 1 x 15 Thick with Alternating Holes Black Part 71710 Element 6321716 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×6
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×2
  • Technic Beam 1 x 4 Thin with Stud Connector Black Part 2825 Element 6331570 or 4107136 ×4
  • Technic Beam 1 x 6 Thin Black Part 32063 Element 6163980 or 4114634 ×4
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×8
  • Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick Black Part 71708 Element 6326047 ×1
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×6
  • Technic Beam 2 x 5 L-Shape with Quarter Ellipse Thick Black Part 80286 Element 6407066 or 6378466 ×1
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×1
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×6
  • Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin Black Part 32250 Element 6327162 or 4128557 ×4
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Black Part 42195 Element 6286381 ×3
  • Technic Panel Curved 5 x 7 Parallelogram Left Black Part 80267 Element 6380021 ×1
  • Technic Panel Curved 5 x 7 Parallelogram Right Black Part 80268 Element 6380030 ×1
  • Technic Panel Curved and Bent 6 x 3 Black Part 24116 Element 6268012 or 6133246 ×1
  • Technic Panel Fairing #1 Small Smooth Short, Side A Black Part 87080 Element 4566251 ×2
  • Technic Panel Fairing #2 Small Smooth Short, Side B Black Part 87086 Element 4566249 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B Black Part 11946 Element 6316923 or 6023036 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A Black Part 11947 Element 6319983 or 6022761 ×2
  • Technic Panel Fairing #5 Long Smooth, Side A Black Part 64681 Element 4558774 ×1
  • Technic Panel Fairing #6 Long Smooth, Side B Black Part 64393 Element 4558731 ×1
  • Technic Panel Fairing 2 x 3 x 1 Black Part 71682 Element 6331026 ×3
  • Technic Pin Connector 3L with 2 Pins and Center Hole [Pin Ridges Across Part] Black Part 46189 Element 6325521 or 6267991 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×14
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×8
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×73
  • Technic Steering Wheel Pilot's Yoke [Closed Top] Black Part 49151 Element 6378464 ×1
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile Round 1 x 1 with Screen, Red/Yellow/Black Buttons/Racing Steer Controls Print Black Part 98138pr0281 Element 6381395 1 spare in the box ×1
  • Tyre 43.2 x 22 ZR Black Part 44309 Element 4184286 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Black Part 56145 Element 4299389 or 4284946 ×4

Blue 64 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×22
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×8
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×34

White 39 pieces

  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×2
  • Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole White Part 32184 Element 6276981 or 6114940 ×2
  • Technic Beam 1 x 11.5 Double Bent Thick White Part 32009 Element 6271161 or 6004157 ×2
  • Technic Beam 1 x 13 Thick White Part 41239 Element 6634561 or 4620671 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole White Part 60483 Element 6265135 or 6177268 ×6
  • Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick White Part 71708 Element 6345327 ×2
  • Technic Beam 2 x 4 L-Shape Thick White Part 32140 Element 6271824 or 4118980 ×3
  • Technic Panel 3 x 7 x 1 White Part 71709 Element 6345328 ×4
  • Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 White Part 42531 Element 6254784 ×2
  • Technic Panel Curved 3 x 13 White Part 18944 Element 6253262 ×1
  • Technic Panel Fairing #21 5L Small Smooth, Side B White Part 11946 Element 6330084 or 6114580 ×1
  • Technic Panel Fairing #22 5L Small Smooth, Side A White Part 11947 Element 6343987 or 6114583 ×1
  • Technic Panel Fairing 2 x 3 x 1 White Part 71682 Element 6334548 ×2
  • Technic Pin Connector Hub with 2 Axles White Part 27940 Element 6257450 ×3
  • Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] White Part 48267 Element 6288218 ×4

Light Bluish Gray 37 pieces

  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×11
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×3
  • Technic Axle Towball Light Bluish Gray Part 2736 Element 6443149 or 4211375 ×1
  • Technic Beam 1 x 15 Thick Light Bluish Gray Part 32278 Element 4542577 or 4211770 ×2
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×4
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Light Bluish Gray Part 65304 Element 6321747 ×16

Red 32 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×7
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×6
  • Technic Axle and Pin Connector Perpendicular Double Split [Reinforced] Red Part 69819 Element 6349275 ×1
  • Technic Beam 1 x 11.5 Double Bent Thick Red Part 32009 Element 6271160 or 4268653 ×1
  • Technic Beam 1 x 3 Thick Red Part 32523 Element 4153718 ×4
  • Technic Beam 1 x 5 Thick Red Part 32316 Element 4142132 or 4128589 ×2
  • Technic Beam 1 x 9 Thick Red Part 40490 Element 4645733 or 4192225 ×2
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×7
  • Technic Panel Curved 5 x 7 Parallelogram Left Red Part 80267 Element 6362552 ×1
  • Technic Panel Curved 5 x 7 Parallelogram Right Red Part 80268 Element 6362553 ×1

Dark Bluish Gray 21 pieces

  • Pullback Motor 6 x 3 x 5 Dark Bluish Gray Part 12799 Element 6143751 or 6024100 ×2
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×1
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×2
  • Technic Axle and Pin Connector Angled #2 - 180° Dark Bluish Gray Part 32034 Element 32034199 or 6271876 ×1
  • Technic Axle and Pin Connector Angled #5 - 112.5° Dark Bluish Gray Part 32015 Element 6271356 or 6195445 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Dark Bluish Gray Part 42003 Element 6273715 or 4210857 ×2
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Dark Bluish Gray Part 11478 Element 6370946 or 6029951 ×4
  • Technic Connector Beam 3 x 3 Dark Bluish Gray Part 39793 Element 6317653 ×1
  • Technic Pin Connector Hub with 1 Axle Dark Bluish Gray Part 22961 Element 6135014 ×7

Tan 7 pieces

  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×4
  • Technic Pin Long without Friction Ridges, with Anti-Roll Notch Tan Part 39888 Element 6321305 ×3

Reddish Brown 3 pieces

  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×2
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×1

Dark Tan 2 pieces

  • Large Figure Weapon Lightsaber Hilt with Axle Hole and Two Bar Holders Dark Tan Part 24122 Element 6311435 ×1
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1

Trans-Red 1 piece

  • Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 42137-1 [No Color/Any Color] Part 80227 Element 6362704 ×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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