BlockTalk Find Your Set

Free tool

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.

Dozer Compactor

Checking

42071 Dozer Compactor

171 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.

Show

Piece checklist

Technic Pins 45 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×14
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×4
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×7
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×9
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×3

Technic Beams 32 pieces

  • Technic Beam 1 x 7 Bent (4 - 4) Thick Black Part 32348 Element 6278125 or 4128593 ×2
  • Technic Beam Triangle Thin [Type II] Black Part 99773 Element 6331437 or 6010864 ×2
  • Technic Beam 1 x 2 Thin Blue Part 41677 Element 6360123 or 4186834 ×6
  • Technic Beam 1 x 3 Thin Blue Part 6632 Element 6344176 or 4107829 ×2
  • Technic Beam 1 x 7 Thick Blue Part 32524 Element 4506043 or 4144285 ×2
  • Technic Beam 2 x 4 L-Shape Thick Blue Part 32140 Element 6271829 or 4168114 ×4
  • Technic Beam 1 x 11 Thick Dark Bluish Gray Part 32525 Element 4603472 or 4534914 ×2
  • Technic Beam 1 x 5 Thick Dark Bluish Gray Part 32316 Element 32316199 or 4210686 ×2
  • Technic Beam 3 x 5 L-Shape Thick Light Bluish Gray Part 32526 Element 4211713 ×1
  • Technic Beam 1 x 3 Thick Orange Part 32523 Element 6102618 or 4655127 ×3
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Orange Part 32348 Element 6278133 or 6102616 ×2
  • Technic Beam 1 x 7 Thick Orange Part 32524 Element 6339024 or 6102621 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole White Part 60483 Element 6265135 or 6177268 ×2

Technic Connectors 26 pieces

  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×4
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×2
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise Black Part 15100 Element 6073231 ×2
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Dark Bluish Gray Part 59443 Element 6084613 or 4516546 ×3
  • Technic Axle and Pin Connector Angled #2 - 180° Dark Bluish Gray Part 32034 Element 32034199 or 6271876 ×1
  • Technic Axle and Pin Connector Perpendicular Double Split Dark Bluish Gray Part 41678 Element 4234599 ×2
  • Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×2
  • Technic Driving Ring Connector Smooth [4 rounded side walls] Light Bluish Gray Part 26287 Element 6196757 ×1
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins Light Bluish Gray Part 48989 Element 4225033 ×3
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole White Part 32184 Element 6276981 or 6114940 ×3

Technic Axles 20 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×1
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×4
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×5
  • Technic Axle 7 Light Bluish Gray Part 44294 Element 44294194 or 4211805 ×3
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×2
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×1
  • Technic Axle 5 Yellow Part 32073 Element 6130008 ×2

Technic Bushes 15 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 ×12
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×3

Technic Gears 11 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Black Part 18575 Element 6346535 or 6093977 ×1
  • Technic Turntable Small Base, 28 Tooth Black Part 99010 Element 6326620 or 4652236 ×1
  • Technic Tread Sprocket Wheel Small 6 Tooth Blue Part 57520 Element 6207994 ×4
  • Technic Worm Gear Short Dark Bluish Gray Part 27938 Element 6170153 ×1
  • Technic Turntable Small Top Light Bluish Gray Part 99009 Element 4652235 ×1
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×1

Technic Panels 6 pieces

  • Technic Panel Curved and Bent 6 x 3 Blue Part 24116 Element 6268009 or 6133684 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B Blue Part 11946 Element 6352643 or 6330924 ×1
  • Technic Panel Fairing #22 5L Small Smooth, Side A Blue Part 11947 Element 6352661 or 6330928 ×1
  • Technic Panel 5 x 11 x 1 Dark Bluish Gray Part 64782 Element 6207990 ×1
  • Technic Panel Curved and Bent 6 x 3 Light Bluish Gray Part 24116 Element 6268004 or 6176758 ×1

Tiles Special 6 pieces

  • Tile Special 1 x 1 with Clip with Rounded Edges Blue Part 15712 Element 6344028 or 6071264 ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×2

Wheels and Tyres 4 pieces

  • Wheel Hard Plastic with Small Cleats Dark Bluish Gray Part 64711 Element 6178537 or 6007027 ×4

Plates Round Curved and Dishes 3 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×1

Transportation - Land 2 pieces

  • Roll Cage 6 x 4 x 3 1/3 Black Part 64450 Element 6240526 or 4539385 ×1
  • Steering Wheel Small, 2 x 2 [Reinforced] Light Bluish Gray Part 16091 Element 6092956 or 6061697 ×1

Stickers 1 piece

  • Sticker Sheet for Set 42071-1 [No Color/Any Color] Part 36173 Element 6210384 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy