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42131 Available

Cat D11 Bulldozer

2021 Technic 3854 parts 231 lots 8 bags

We only found 706 Black Technic, Pin with Short Friction Ridges (2780) use in the instructions, but 707 are listed in the set inventory. The additionnal pin has been added in the Unknown bag.

Thanks to Matt.in.Alba, Otter, FlamingoFlame, Skogbit, FlickBrick240 for helping identify parts

42131 Cat D11 Bulldozer

Bag inventory

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1

246 parts 46 lots ~226.60g
Technic, Axle  2L with Pin with Friction Ridges in Black
Black

Technic, Axle 2L with Pin with Friction Ridges

18651 ×2
Technic, Axle  4L in Black
Black

Technic, Axle 4L

3705 ×2
Technic, Axle 12L in Black
Black

Technic, Axle 12L

3708 ×1
Technic, Axle and Pin Connector Perpendicular 3L with 2 Pin Holes in Black
Black

Technic, Axle and Pin Connector Perpendicular 3L with 2 Pin Holes

42003 ×1
Technic, Gear 12 Tooth Double Bevel in Black
Black

Technic, Gear 12 Tooth Double Bevel

32270 ×1
Technic, Liftarm Thick 1 x 2 - Axle Hole in Black
Black

Technic, Liftarm Thick 1 x 2 - Axle Hole

60483 ×2
Technic, Liftarm Thick 1 x 7 in Black
Black

Technic, Liftarm Thick 1 x 7

32524 ×1
Technic, Liftarm, Modified Perpendicular Holes Thick 1 x 11 in Black
Black

Technic, Liftarm, Modified Perpendicular Holes Thick 1 x 11

73507 ×4
Technic, Liftarm, Modified Perpendicular Holes Thick 1 x 15 in Black
Black

Technic, Liftarm, Modified Perpendicular Holes Thick 1 x 15

71710 ×4
Technic, Pin with Short Friction Ridges in Black
Black

Technic, Pin with Short Friction Ridges

2780 ×56
Technic, Axle  1L with Pin with Friction Ridges in Blue
Blue

Technic, Axle 1L with Pin with Friction Ridges

43093 ×1
Technic, Pin 1/2 without Friction Ridges in Blue
Blue

Technic, Pin 1/2 without Friction Ridges

4274 ×2
Technic, Pin 3L with Friction Ridges in Blue
Blue

Technic, Pin 3L with Friction Ridges

6558 ×64
Technic, Axle  4L with Stop in Dark Bluish Gray
Dark Bluish Gray

Technic, Axle 4L with Stop

87083 ×1
Technic, Axle Connector 2L (Smooth with x Hole + Orientation) in Dark Bluish Gray
Dark Bluish Gray

Technic, Axle Connector 2L (Smooth with x Hole + Orientation)

6538c ×1
Technic, Gear Differential 28 Tooth Bevel - Inner Tabs with Closed Center in Dark Bluish Gray
Dark Bluish Gray

Technic, Gear Differential 28 Tooth Bevel - Inner Tabs with Closed Center

62821b ×1
Technic, Liftarm Thick 1 x 13 in Dark Bluish Gray
Dark Bluish Gray

Technic, Liftarm Thick 1 x 13

41239 ×6
Technic, Liftarm Thick 1 x 3 in Dark Bluish Gray
Dark Bluish Gray

Technic, Liftarm Thick 1 x 3

32523 ×8
Technic, Axle  1L with Tow Ball in Light Bluish Gray
Light Bluish Gray

Technic, Axle 1L with Tow Ball

2736 ×1
Technic, Axle  3L in Light Bluish Gray
Light Bluish Gray

Technic, Axle 3L

4519 ×6
Technic, Axle  7L in Light Bluish Gray
Light Bluish Gray

Technic, Axle 7L

44294 ×1
Technic, Axle and Pin Connector Perpendicular in Light Bluish Gray
Light Bluish Gray

Technic, Axle and Pin Connector Perpendicular

6536 ×6
Technic, Axle and Pin Connector Perpendicular Triple in Light Bluish Gray
Light Bluish Gray

Technic, Axle and Pin Connector Perpendicular Triple

63869 ×2
Technic, Liftarm Thick 1 x 5 in Light Bluish Gray
Light Bluish Gray

Technic, Liftarm Thick 1 x 5

32316 ×2
Technic, Liftarm Thick 1 x 9 in Light Bluish Gray
Light Bluish Gray

Technic, Liftarm Thick 1 x 9

40490 ×2
Technic, Liftarm, Modified Bent Thick L-Shape 3 x 5 in Light Bluish Gray
Light Bluish Gray

Technic, Liftarm, Modified Bent Thick L-Shape 3 x 5

32526 ×2
Technic, Liftarm, Modified Frame Thick 5 x 11 Open Center in Light Bluish Gray
Light Bluish Gray

Technic, Liftarm, Modified Frame Thick 5 x 11 Open Center

64178 ×3
Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center in Light Bluish Gray
Light Bluish Gray

Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center

64179 ×4
Technic, Pin 3L with Friction Ridges and Center Pin Hole in Light Bluish Gray
Light Bluish Gray

Technic, Pin 3L with Friction Ridges and Center Pin Hole

87082 ×2
Technic, Steering Axle with 2 Pin Holes, 2 Axle Holes and 2 Tow Ball Arms with Dark Bluish Gray Wheel Hub in Light Bluish Gray
Light Bluish Gray

Technic, Steering Axle with 2 Pin Holes, 2 Axle Holes and 2 Tow Ball Arms with Dark Bluish Gray Wheel Hub

46490c01 ×2
Technic, Steering CV Joint, Large Ball in Light Bluish Gray
Light Bluish Gray

Technic, Steering CV Joint, Large Ball

52731 ×2
Technic, Axle  1L with Pin 2L with Friction Ridges in Red
Red

Technic, Axle 1L with Pin 2L with Friction Ridges

11214 ×4
Technic, Axle  2L Notched in Red
Red

Technic, Axle 2L Notched

32062 ×3
Technic, Pin 3L with Friction Ridges and Stop Bush in Red
Red

Technic, Pin 3L with Friction Ridges and Stop Bush

32054 ×12
Technic, Pin with Friction Ridges and Tow Ball with Round Pin Hole in Red
Red

Technic, Pin with Friction Ridges and Tow Ball with Round Pin Hole

6628a ×2
Technic, Axle  3L with Stop in Reddish Brown
Reddish Brown

Technic, Axle 3L with Stop

24316 ×1
Technic, Gear 12 Tooth Bevel in Tan
Tan

Technic, Gear 12 Tooth Bevel

6589 ×4
Technic, Gear 20 Tooth Double Bevel in Tan
Tan

Technic, Gear 20 Tooth Double Bevel

32269 ×1
Technic, Liftarm Thick 1 x 1 (Spacer) in White
White

Technic, Liftarm Thick 1 x 1 (Spacer)

18654 ×3
Technic, Liftarm Thick 1 x 2 in Yellow
Yellow

Technic, Liftarm Thick 1 x 2

43857 ×1
Technic, Liftarm Thick 1 x 7 in Yellow
Yellow

Technic, Liftarm Thick 1 x 7

32524 ×1
Technic, Liftarm, Modified Bent Thick 1 x 11.5 Double in Yellow
Yellow

Technic, Liftarm, Modified Bent Thick 1 x 11.5 Double

32009 ×2
Technic, Liftarm, Modified Bent Thick L-Shape 2 x 4 in Yellow
Yellow

Technic, Liftarm, Modified Bent Thick L-Shape 2 x 4

32140 ×15
Technic, Liftarm, Modified T-Shape Thick 3 x 3 in Yellow
Yellow

Technic, Liftarm, Modified T-Shape Thick 3 x 3

60484 ×2
Technic, Panel Plate 3 x 7 x 1 in Yellow
Yellow

Technic, Panel Plate 3 x 7 x 1

71709 ×1
Technic, Pin with Friction Ridges and Pin Hole in Yellow
Yellow

Technic, Pin with Friction Ridges and Pin Hole

15100 ×1

Frequently asked questions

This bag inventory was built by following the official LEGO building instructions step by step. At every step, we recorded which pieces were used and which numbered bag they came from, resulting in a complete parts list per bag.

Each numbered bag contains a specific subset of the set's total parts. By selecting a bag above, you can see every piece it includes — with part images, color details, and exact quantities.

Click on a bag, then use the export buttons in the toolbar. You can download a PDF for easy reference, or a BSX file — a BrickLink-compatible XML format you can import into tools like BrickStore.

We use bag 0 to list all parts that are outside of numbered bags, such as sticker sheets or some larger parts that are often not in any bag but directly in the box.

Since inventories are built by hand, mistakes can happen. If you spot anything wrong, please contact us so we can review and correct it.