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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.

Cement Mixer

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42112 Cement Mixer

1,161 pieces in 128 part and color combinations.

LEGO counts 1,163 pieces. This inventory comes from a separate parts catalog and lists 1,161; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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 301 pieces

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×1
  • Technic Axle 4 Black Part 3705 Element 370526 ×7
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×1
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×16
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×6
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×11
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×34
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×4
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×1
  • Technic Axle and Pin Connector Toggle Joint Smooth Black Part 32126 Element 6457112 or 6322045 ×2
  • Technic Beam 1 x 11 Thick Black Part 32525 Element 6029578 or 4534909 ×10
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×3
  • Technic Beam 1 x 7 Thin Black Part 32065 Element 6271573 or 6253293 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Black Part 32271 Element 6276835 or 4140327 ×2
  • Technic Beam 3 x 3 T-Shape Thick Black Part 60484 Element 4552347 or 4535771 ×5
  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×6
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×1
  • Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×2
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×11
  • Technic Pin Connector Toggle Joint Smooth Double with Axle and Pin Holes Black Part 87408 Element 6278412 or 4558692 ×2
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×161
  • Technic Turntable Large Type 3 Top, 60 Tooth Black Part 18938 Element 6109283 ×1
  • Tyre 14 x 6 Solid Smooth Black Part 50951 Element 4246901 ×4
  • Tyre 49.53 x 20 Black Part 15413 Element 6518565 or 6055626 ×8

Light Bluish Gray 253 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 ×4
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×16
  • Technic Axle 9 Light Bluish Gray Part 60485 Element 4535768 ×2
  • Technic Axle Connector Hub with 3 Axles at 120° Light Bluish Gray Part 57585 Element 4502595 ×2
  • Technic Axle and Pin Connector Angled #3 - 157.5° Light Bluish Gray Part 32016 Element 6261387 or 4211552 ×2
  • Technic Axle and Pin Connector Angled #5 - 112.5° Light Bluish Gray Part 32015 Element 6271347 or 4211551 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Light Bluish Gray Part 42003 Element 6273724 or 4211779 ×28
  • Technic Axle and Pin Connector Perpendicular Split Light Bluish Gray Part 92907 Element 6279023 or 4630114 ×4
  • Technic Beam 1 x 13 Thick Light Bluish Gray Part 41239 Element 4522934 or 4156299 ×6
  • Technic Beam 1 x 3 Thick Light Bluish Gray Part 32523 Element 4211655 ×13
  • Technic Beam 1 x 5 Thick Light Bluish Gray Part 32316 Element 4211651 ×20
  • Technic Beam 1 x 6 Thin Light Bluish Gray Part 32063 Element 6170293 or 4211586 ×4
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Light Bluish Gray Part 32348 Element 6278129 or 4211668 ×2
  • Technic Beam 1 x 7 Thick Light Bluish Gray Part 32524 Element 4495930 or 4211665 ×7
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Light Bluish Gray Part 6629 Element 6279885 or 4255613 ×2
  • Technic Beam 1 x 9 Thick Light Bluish Gray Part 40490 Element 6102449 or 4211866 ×8
  • Technic Beam 2 x 4 L-Shape Thick Light Bluish Gray Part 32140 Element 6271831 or 4211610 ×10
  • Technic Beam 3 x 5 L-Shape Thick Light Bluish Gray Part 32526 Element 4211713 ×12
  • Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×2
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×4
  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×18
  • Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] Light Bluish Gray Part 42195 Element 6273212 ×8
  • Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×4
  • Technic Panel Curved and Bent 6 x 3 Light Bluish Gray Part 24116 Element 6268004 or 6176758 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B Light Bluish Gray Part 11946 Element 6524693 or 6340661 ×3
  • Technic Panel Fairing #22 5L Small Smooth, Side A Light Bluish Gray Part 11947 Element 6524692 or 6352683 ×3
  • Technic Pin 1/2 without Friction Ridges Light Bluish Gray Part 4274 Element 4274194 or 4211483 1 spare in the box ×26
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) Light Bluish Gray Part 65489 Element 6282158 ×13
  • Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×6
  • Technic Pin Double with Axle Hole - Squared Holes Light Bluish Gray Part 65098 Element 6406084 or 6315900 ×2
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×2
  • Technic Steering Wheel Small (3 Studs Diameter) Light Bluish Gray Part 2819 Element 4580510 or 4211578 ×1
  • Technic Turntable Large Type 3 Base Light Bluish Gray Part 18939 Element 6109285 ×1
  • Technic Universal Joint 3L [Complete Assembly] Light Bluish Gray Part 61903 Element 6335279 or 6321309 ×1
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×1
  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×4
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Light Bluish Gray Part 56145 Element 4297210 ×8

Blue 203 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×46
  • Technic Axle and Pin Connector Perpendicular Blue Part 6536 Element 6261383 or 6178359 ×4
  • Technic Beam 1 x 13 Thick Blue Part 41239 Element 6302337 or 6173125 ×3
  • Technic Beam 1 x 3 Thick Blue Part 32523 Element 4509376 or 4144284 ×14
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Blue Part 32348 Element 6345498 or 6302340 ×6
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Blue Part 6629 Element 6279882 or 4182884 ×6
  • Technic Beam 1 x 9 Thick Blue Part 40490 Element 6115617 or 4239749 ×2
  • Technic Beam 2 x 4 L-Shape Thick Blue Part 32140 Element 6271829 or 4168114 ×6
  • Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin Blue Part 32249 Element 6336748 or 6302336 ×4
  • Technic Gear 20 Tooth Double Bevel with Clutch on Both Sides Blue Part 35185 Element 6224999 ×1
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×111

Dark Bluish Gray 119 pieces

  • Clutch Inner Side with Axle Connector Dark Bluish Gray Part 46835 Element 6257337 ×1
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×4
  • Technic Axle 8 with Stop Dark Bluish Gray Part 55013 Element 4499858 ×4
  • Technic Driving Ring 3L Dark Bluish Gray Part 18947 Element 6100931 ×1
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Dark Bluish Gray Part 3648b Element 6133119 or 4514558 ×1
  • Technic Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth [Sharp Edge] Dark Bluish Gray Part 62821c ×2
  • Technic Pin Connector Hub with 2 Axles Dark Bluish Gray Part 27940 Element 6167281 ×6
  • Technic Pin Connector Round 1L [Beam] Dark Bluish Gray Part 18654 Element 6100030 2 spares in the box ×100

Red 59 pieces

  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×12
  • Technic Axle 6 Red Part 3706 Element 6130002 or 4191526 ×1
  • Technic Axle Connector Smooth [with x Hole + Orientation] Red Part 59443 Element 4513174 ×13
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×19
  • Technic Axle and Pin Connector Angled #4 - 135° Red Part 32192 Element 6262898 or 4271646 ×1
  • Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Red Part 61408 Element 6331864 ×1
  • Technic Changeover Catch - New Style Red Part 51149 Element 6313493 ×1
  • Technic Gear 16 Tooth with Clutch on Both Sides Red Part 18946 Element 6100930 ×2
  • Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] Red Part 44874 Element 6323573 ×9

White 57 pieces

  • Clutch Outer Side with Axle Connector White Part 46834 Element 6257336 ×1
  • Technic Axle and Pin Connector Angled #1 White Part 32013 Element 6332573 or 4118981 ×1
  • Technic Beam 1 x 7 Thick White Part 32524 Element 6564912 or 6318056 ×10
  • Technic Beam 1 x 9 Thick White Part 40490 Element 6001831 or 4156341 ×2
  • Technic Beam 3 x 3 L-Shape with Quarter Ellipse Thin White Part 32249 Element 6618841 or 6336750 ×4
  • Technic Connector Beam 3 x 3 White Part 39793 Element 6247424 ×6
  • Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×1
  • Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 White Part 42531 Element 6254784 ×1
  • Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface White Part 24119 Element 6246996 ×4
  • Technic Pin Connector Round 1L [Beam] White Part 18654 Element 6550155 or 6177114 2 spares in the box ×27

Yellow 54 pieces

  • Technic Axle 11 Yellow Part 23948 Element 6130012 ×1
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×31
  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Yellow Part 32184 Element 6276974 or 6037676 ×16
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×4

Orange 39 pieces

  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Orange Part 60483 Element 6265128 or 6057526 ×14
  • Technic Pin Connector Hub with 2 Perpendicular Axles Orange Part 10197 Element 6610718 or 6259825 ×2
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Orange Part 32054 Element 6143033 or 4229603 ×23

Dark Blue 31 pieces

  • Concrete Mixer Half Shell with Orange Arrow, White Circle Print Dark Blue Part 65421pr0001 Element 6302622 ×2
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Dark Blue Part 60483 Element 6344867 or 6233765 ×5
  • Technic Beam 1 x 3 Thick Dark Blue Part 32523 Element 6434419 or 6302341 ×2
  • Technic Beam 1 x 5 Thick Dark Blue Part 32316 Element 6420960 or 6151082 ×4
  • Technic Beam 2 x 4 L-Shape Thick Dark Blue Part 32140 Element 6271839 or 6217682 ×2
  • Technic Beam 3 x 5 L-Shape Thick Dark Blue Part 32526 Element 6217683 or 6059010 ×8
  • Technic Panel 5 x 11 x 1 Dark Blue Part 64782 Element 6151067 or 6059012 ×2
  • Technic Panel Curved and Bent 6 x 3 Dark Blue Part 24116 Element 6268003 or 6174849 ×2
  • Technic Panel Fairing #21 5L Small Smooth, Side B Dark Blue Part 11946 Element 6352645 or 6174854 ×2
  • Technic Panel Fairing #22 5L Small Smooth, Side A Dark Blue Part 11947 Element 6352664 or 6174857 ×2

Tan 19 pieces

  • Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×8
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×3
  • Technic Pin Long without Friction Ridges Tan Part 32556 ×4

Reddish Brown 11 pieces

  • Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×10
  • Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×1

Trans-Clear 6 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×6

Trans-Orange 6 pieces

  • Tile Round 1 x 1 Trans-Orange Part 98138 Element 6514197 or 6274747 1 spare in the box ×6

Trans-Red 2 pieces

  • Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 42112-1 [No Color/Any Color] Part 68301 Element 6303284 ×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.

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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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