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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.

NEOM McLaren Extreme E Race Car

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42166 NEOM McLaren Extreme E Race Car

252 pieces in 63 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 118 pieces

  • Axle Hose, Soft 7L Black Part 32580 Element 6132744 ×2
  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×2
  • Technic Axle and Pin Connector Angled Triple [120° Offset] Black Part 10288 Element 6460708 or 6273221 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×2
  • Technic Beam 1 x 11 Thick with Alternating Holes Black Part 73507 Element 6330585 ×2
  • Technic Beam 1 x 2 Thin Black Part 41677 Element 6338428 or 4167726 ×2
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×4
  • Technic Beam 1 x 9 Thick Black Part 40490 Element 4645732 or 4542788 ×1
  • Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick Black Part 71708 Element 6326047 ×2
  • Technic Beam 2 x 5 L-Shape with Quarter Ellipse Thick Black Part 80286 Element 6407066 or 6378466 ×2
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×8
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Black Part 42195 Element 6286381 ×1
  • Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface Black Part 24119 Element 6150082 ×1
  • Technic Panel Curved and Bent 6 x 3 Black Part 24116 Element 6268012 or 6133246 ×2
  • Technic Panel Fairing # 3 Small Smooth Long, Side A Black Part 64683 Element 4541924 ×1
  • Technic Panel Fairing # 4 Small Smooth Long, Side B Black Part 64391 Element 4541325 ×1
  • Technic Panel Fairing #21 5L Small Smooth, Side B Black Part 11946 Element 6316923 or 6023036 ×3
  • Technic Panel Fairing #22 5L Small Smooth, Side A Black Part 11947 Element 6319983 or 6022761 ×3
  • Technic Panel Fairing #7 3L Very Small Smooth, Side A Black Part 2387 Element 6510991 or 6426589 ×2
  • Technic Panel Fairing #8 3L Very Small Smooth, Side B Black Part 2389 Element 6513874 or 6426590 ×2
  • Technic Panel Fairing 2 x 1 x 1 Black Part 89679 Element 6396456 ×1
  • Technic Panel Fairing 2 x 3 x 1 Black Part 71682 Element 6331026 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×10
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×6
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×40
  • Tyre 43.2 x 14 Offset Tread Black Part 56898 Element 6518544 or 4539268 ×4
  • Wheel 30 x 14 Black Part 56904 Element 6251174 ×4

Blue 51 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×22
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×29

Light Bluish Gray 21 pieces

  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×1
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×2
  • Technic Axle and Pin Connector Perpendicular Triple Light Bluish Gray Part 63869 Element 6331441 or 4538007 ×4
  • Technic Beam 1 x 13 Thick Light Bluish Gray Part 41239 Element 4522934 or 4156299 ×2
  • Technic Beam 1 x 3 Thick Light Bluish Gray Part 32523 Element 4211655 ×2
  • Technic Beam 2 x 4 L-Shape Thick Light Bluish Gray Part 32140 Element 6271831 or 4211610 ×3
  • Technic Beam 3 x 5 L-Shape Thick Light Bluish Gray Part 32526 Element 4211713 ×2
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×1
  • 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

Red 20 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×11
  • Technic Beam 1 x 2 Thick Red Part 43857 Element 4185664 ×2
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×4
  • Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole Red Part 66906 Element 6360104 ×3

Orange 18 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Orange Part 24866 Element 6214234 1 spare in the box ×2
  • Technic Beam 1 x 3 Thick Orange Part 32523 Element 6102618 or 4655127 ×2
  • Technic Beam 1 x 7 Thick Orange Part 32524 Element 6339024 or 6102621 ×1
  • Technic Panel 3 x 11 x 1 Orange Part 15458 Element 6339023 or 6102612 ×1
  • Technic Panel Curved and Bent 6 x 3 Orange Part 24116 Element 6460711 ×2
  • Technic Panel Fairing 2 x 3 x 1 Orange Part 71682 Element 6358255 ×4
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Orange Part 65487 Element 6390390 ×4
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Orange Part 65304 Element 6347790 ×2

Dark Bluish Gray 13 pieces

  • Bar 2L with Towball Dark Bluish Gray Part 22484 Element 6364352 or 6360117 ×2
  • Pullback Motor 6 x 3 x 5 Dark Bluish Gray Part 12799 Element 6143751 or 6024100 ×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 11 Thick Dark Bluish Gray Part 32525 Element 4603472 or 4534914 ×2
  • Technic Beam 1 x 11.5 Double Bent Thick Dark Bluish Gray Part 32009 Element 6271155 or 4210668 ×2
  • Technic Pin 1/2 with Friction Dark Bluish Gray Part 89678 Element 6395635 1 spare in the box ×4

Lime 6 pieces

  • Bar 4L (Lightsaber Blade / Wand) Lime Part 30374 Element 6327442 ×4
  • Technic Pin Connector Round 1L [Beam] Lime Part 18654 Element 6302741 1 spare in the box ×2

Trans-Clear 2 pieces

  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×2

Yellow 2 pieces

  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 42166-1 [No Color/Any Color] Part 10105322 Element 6462835 ×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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