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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.

Monster Jam El Toro Loco

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42135 Monster Jam El Toro Loco

247 pieces in 62 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

Technic Pins 100 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×4
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×28
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×15
  • Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×28
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×11
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [2 Lateral Holes, Small Pin Hole] Light Bluish Gray Part 65304 Element 6321747 ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×8
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4

Technic Beams 47 pieces

  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×2
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×1
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×2
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×2
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×5
  • Technic Beam 2 x 3 L-Shape with Quarter Ellipse Thick Black Part 71708 Element 6326047 ×2
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×4
  • Technic Beam 1 x 15 Thick Dark Bluish Gray Part 32278 Element 32278199 or 4542576 ×2
  • Technic Beam 3 x 3 T-Shape Thick Dark Bluish Gray Part 60484 Element 4552349 or 4535773 ×2
  • Technic Beam 3 x 5 L-Shape Thick Dark Bluish Gray Part 32526 Element 4210753 ×1
  • Technic Beam 1 x 2 Thick Light Bluish Gray Part 43857 Element 4211862 ×2
  • Technic Beam 1 x 15 Thick Orange Part 32278 Element 6358259 or 6135083 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Orange Part 60483 Element 6265128 or 6057526 ×9
  • Technic Beam 1 x 5 Thick Orange Part 32316 Element 6143014 or 4142138 ×1
  • Technic Beam 1 x 9 Thick Orange Part 40490 Element 6135086 or 4157376 ×3
  • Technic Beam 2 x 4 L-Shape Thick Orange Part 32140 Element 6271832 or 4508664 ×5
  • Technic Beam 3 x 5 L-Shape Thick Orange Part 32526 Element 6143015 or 4626639 ×1
  • Technic Beam 1 x 7 Thick Yellow Part 32524 Element 4495934 or 4187082 ×1

Technic Connectors 32 pieces

  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×4
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×6
  • Technic Axle and Pin Connector Perpendicular Double Split [Reinforced] Black Part 69819 Element 6349281 ×2
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×2
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×4
  • Technic Pin Connector Round 1L [Beam] Dark Bluish Gray Part 18654 Element 6100030 1 spare in the box ×4
  • Technic Axle and Pin Connector Angled #2 - 180° Orange Part 32034 Element 6271874 or 6135092 ×1
  • Technic Pin Connector Perpendicular 2 x 4 Bent - Beam with 90 Hole Ø 4.8 Orange Part 11455 Element 6370447 ×2
  • Technic Pin Connector Round 1L [Beam] White Part 18654 Element 6550155 or 6177114 1 spare in the box ×4
  • Technic Pin Connector Round [Slotted] Yellow Part 62462 Element 6173122 or 4526983 ×2

Technic Axles 19 pieces

  • Technic Axle 12 Black Part 3708 Element 370826 ×2
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×4
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×2
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×4
  • Technic Axle 4 Red Part 3705 Element 6129995 or 4265797 ×2
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×3

Bars, Ladders and Fences 10 pieces

  • Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki Eye White Part 58176 Element 6194512 or 4623199 1 spare in the box ×10

Technic Bushes 10 pieces

  • 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 Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×6

Technic Panels 9 pieces

  • Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 Orange Part 42531 Element 6249344 ×2
  • Technic Panel Fairing #1 Small Smooth Short, Side A Orange Part 87080 Element 6370445 or 6303434 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B Orange Part 87086 Element 6370444 or 6303436 ×1
  • Technic Panel Fairing #21 5L Small Smooth, Side B Orange Part 11946 Element 6340604 or 6022767 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A Orange Part 11947 Element 6352662 or 6286428 ×2
  • Technic Panel Fairing 2 x 3 x 1 Orange Part 71682 Element 6358255 ×1

Bricks Round and Cones 8 pieces

  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Light Bluish Gray Part 25214 Element 6151349 ×2
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Orange Part 25214 Element 6629148 or 6372659 ×2
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Yellow Part 25214 Element 6253294 or 6173898 ×2
  • Cone 1 x 1 [Top Groove] Yellow Part 59900 Element 4525464 ×2

Wheels and Tyres 8 pieces

  • Tyre 56 x 26 Balloon Black Part 55976 Element 6495636 or 4297209 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Orange Part 56145 Element 6597019 or 6207477 ×4

Tubes and Hoses 2 pieces

  • Hose, Ribbed 7mm D. 2L / 1.6cm Flat Silver Part 78c02 Element 6525133 or 4620070 1 spare in the box ×2

Mechanical 1 piece

  • Pullback Motor 6 x 3 x 5 Dark Bluish Gray Part 12799 Element 6143751 or 6024100 ×1

Stickers 1 piece

  • Sticker Sheet for Set 42135-1 [No Color/Any Color] Part 80224 Element 6362701 ×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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