How many pieces are in the Cat D11 Bulldozer?

Cat D11 Bulldozer contains 3,854 pieces.

What age is the Cat D11 Bulldozer recommended for?

This set is recommended for ages 18+.

When was the Cat D11 Bulldozer released?

Cat D11 Bulldozer was released in 2021.

1 / 13

🏛 Technic

Set #42131

Cat D11 Bulldozer

The Cat D11 Bulldozer is a Technic masterpiece.

Before you buy

Who it's for: Ages 18+ · Expert build Experienced Technic builders and construction equipment enthusiasts
Build: 3,854 pieces · about 12 hours Build time is an estimate.
Price: $499.99 list price · 13.0¢ per piece
Availability: Retired at LEGO

★★★★☆ 4.4 community rating from 107 ratings

Enthusiasts praise the Cat D11 Bulldozer for its realistic design, impressive size, and functional app-controlled features. However, some criticize the high price and the reliance on the app for full functionality.

$499.99

Best Price

$449.99

You Save

10% OFF

📝 Our Take

AI-assisted editorial summary, grounded in our LEGO database and public community discussions. How we use AI

The Cat D11 Bulldozer is a Technic masterpiece. With over 3,800 pieces, it's an incredibly detailed and functional model of the real-world construction icon, featuring a working app-controlled system.

This set is perfect for experienced Technic builders and construction equipment enthusiasts. It offers a challenging and rewarding build experience, resulting in an impressive display model with advanced motorized functions.

Skip this if you're new to Technic or prefer smaller, less complex builds. Consider simpler Technic sets or models from other themes like LEGO City for a less demanding experience.

✨ New

Ask BlockTalk about this set

AI assistant with full set data

BlockTalk

Hi! I'm BlockTalk, your LEGO expert. Ask me anything about the Cat D11 Bulldozer - building tips, investment potential, comparisons, or anything else!

Try asking:

How does the app control system enhance the building and play experience? What are the key differences between this model and the real Cat D11 Bulldozer? How does the price of this set compare to other large Technic models and is it worth the investment? What are some creative ways to display this set to showcase its features?

🧱 Building Experience

AI-assisted build estimate, grounded in our LEGO database and public community discussions. How we use AI

🧩

3,854

Pieces

⏱

12h

Estimated Build Time

📊

Expert

Difficulty

📏

26cm × 57cm × 37cm

Dimensions

Build Highlights:

Complex gear systems and intricate detailing
App-controlled movement and functionality
Recreation of the Cat D11's modular design
Realistic tilting, raising, and lowering blade

📈 Investment Analysis

AI-assisted investment analysis, grounded in our LEGO database and public community discussions. How we use AI

↑ Trending up since release

A-

Investment Grade

⏳ Retired

The Cat D11 Bulldozer (42131) presents a compelling investment opportunity within the LEGO Technic theme. As a large, retired set with a high piece count and functional Power Functions elements, it appeals to both Technic enthusiasts and collectors. The set's rising price trend indicates strong demand in the secondary market. The Caterpillar license adds to its collectibility, as construction equipment models have a dedicated following. However, potential investors should note that Technic sets can be more volatile than licensed themes like Star Wars or modular buildings. Still, the D11's rarity and complexity position it well for long-term appreciation.

Not Financial Advice: Content is for educational purposes only. Past performance doesn't guarantee future results. Full disclaimer

⚖ Compare Similar Sets

Liebherr R 9800 Excavator

Liebherr Crawler Crane LR 13000

Technic • 2,883 pcs

$699.99

Compared to other large Technic sets like the Liebherr R 9800 Excavator (42100), the Cat D11 Bulldozer offers a different type of construction vehicle experience. While the Liebherr focuses on digging, the D11 emphasizes pushing and grading. Both sets feature app-controlled functionality and a high piece count, but the D11's Caterpillar license may appeal to a different audience. Consider the type of construction vehicle you prefer and the available display space when choosing between these sets.

📦 Parts Inventory

Official piece count: 3,854
Parts cataloged in this inventory: 175 unique parts, 3,854 pieces

Missing a piece? Check this set piece by piece, with look-alike colors flagged and element IDs for replacements.

Plate 3 x 3

Part #: 11212 1× Light Bluish Gray

Technic Axle Pin ...

Part #: 11214 84× Red

Brick Curved 2 x ...

Part #: 11477 1× Light Bluish Gray

Technic Beam 1 x ...

Part #: 11478 35× Yellow

Technic Beam 1 x ...

Part #: 11478 14× Black

Technic Panel Fai...

Part #: 11946 2× Yellow

Technic Panel Fai...

Part #: 11946 2× Black

Technic Panel Fai...

Part #: 11947 2× Black

Technic Panel Fai...

Part #: 11947 2× Yellow

Technic Panel Cur...

Part #: 11954 4× Yellow

Wheel 18 x 8 with...

Part #: 13971 2× Light Bluish Gray

Technic Beam 3 x ...

Part #: 14720 1× Light Bluish Gray

Technic Beam 3 x ...

Part #: 14720 3× Yellow

Brick Curved 2 x ...

Part #: 15068 1× Light Bluish Gray

Technic Panel 3 x...

Part #: 15458 8× Black

Technic Panel 3 x...

Part #: 15458 16× Yellow

Technic Axle 5 wi...

Part #: 15462 14× Reddish Brown

Tile Special Roun...

Part #: 15535 16× Black

Brick Round 2 x 2...

Part #: 17485 6× Black

Technic Gear 20 T...

Part #: 18575 3× Black

Technic Gear 20 T...

Part #: 18575 6× Tan

Technic Axle Pin ...

Part #: 18651 23× Black

Technic Pin Conne...

Part #: 18654 6× Light Bluish Gray

Technic Pin Conne...

Part #: 18654 61× Black

Technic Pin Conne...

Part #: 18654 18× White

Plate Special Rou...

Part #: 18674 2× Light Bluish Gray

Plate Special 1 x...

Part #: 18677 2× Black

Plate Special 1 x...

Part #: 18677 6× Light Bluish Gray

Technic Gear Rack...

Part #: 18940 2× Dark Bluish Gray

Technic Gear Rack...

Part #: 18942 2× Dark Bluish Gray

Technic Panel 5 x...

Part #: 18945 6× Yellow

Technic Panel 5 x...

Part #: 18945 8× Black

Technic Gear 16 T...

Part #: 18946 15× Red

Technic Driving R...

Part #: 18947 2× Dark Bluish Gray

Motor, Large, Pow...

Part #: 22169 2× Dark Bluish Gray

Technic Axle 11

Part #: 23948 7× Light Bluish Gray

Tile Special 1 x ...

Part #: 2412b 4× Black

Plate 2 x 2 Corner

Part #: 2420 2× Black

Tile 1 x 4 with G...

Part #: 2431 1× Light Bluish Gray

Technic Axle 3 wi...

Part #: 24316 7× Reddish Brown

Plate 2 x 12

Part #: 2445 2× Light Bluish Gray

Brick Round 1 x 1...

Part #: 25214 6× Light Bluish Gray

Tile 2 x 3

Part #: 26603 1× Light Bluish Gray

Technic Axle Towball

Part #: 2736 1× Light Bluish Gray

Technic Worm Gear...

Part #: 27938 3× Dark Bluish Gray

Technic Pin Conne...

Part #: 27940 6× Dark Bluish Gray

Technic Engine Cy...

Part #: 2850b 12× Light Bluish Gray

Technic Engine Pi...

Part #: 2851 12× Yellow

Technic Engine Co...

Part #: 2852 12× Light Bluish Gray

Technic Engine Cr...

Part #: 2853 2× Yellow

Technic Engine Cr...

Part #: 2854 5× Tan

Plate 2 x 4

Part #: 3020 1× Black

Plate 1 x 1

Part #: 3024 1× Black

Tile 1 x 2 with G...

Part #: 3069b 2× Light Bluish Gray

Technic Steering ...

Part #: 31794 2× Yellow

Technic Pin 3/4

Part #: 32002 3× Tan

Technic Beam 1 x ...

Part #: 32009 4× Yellow

Technic Axle and ...

Part #: 32013 4× Light Bluish Gray

Technic Axle and ...

Part #: 32013 41× Black

Technic Axle and ...

Part #: 32014 11× Black

Technic Axle and ...

Part #: 32015 2× Light Bluish Gray

Technic Axle and ...

Part #: 32034 16× Black

Technic Beam 3 x ...

Part #: 32056 1× Red

Technic Beam 3 x ...

Part #: 32056 4× Light Bluish Gray

Technic Beam 3 x ...

Part #: 32056 3× Yellow

Technic Beam 3 x ...

Part #: 32056 2× Black

Technic Axle 2 No...

Part #: 32062 104× Red

Technic Beam 1 x ...

Part #: 32063 8× Black

Technic Beam 1 x ...

Part #: 32063 14× Yellow

Technic Beam 1 x ...

Part #: 32063 4× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32065 1× White

Technic Axle 5

Part #: 32073 44× Yellow

Technic Bush 1/2 ...

Part #: 32123b 34× Yellow

Technic Beam 2 x ...

Part #: 32140 18× Black

Technic Beam 2 x ...

Part #: 32140 3× Light Bluish Gray

Technic Beam 2 x ...

Part #: 32140 49× Yellow

Technic Axle and ...

Part #: 32184 18× Yellow

Technic Axle and ...

Part #: 32192 3× Dark Bluish Gray

Technic Gear 20 T...

Part #: 32198 24× Tan

Technic Beam 3 x ...

Part #: 32250 2× Dark Bluish Gray

Technic Gear 12 T...

Part #: 32270 17× Black

Technic Beam 1 x ...

Part #: 32271 2× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 32278 8× Black

Technic Beam 1 x ...

Part #: 32278 20× Yellow

Technic Axle and ...

Part #: 32291 9× Black

Technic Axle and ...

Part #: 32291 2× White

Technic Beam 1 x ...

Part #: 32316 12× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32316 7× Black

Technic Beam 1 x ...

Part #: 32316 30× Yellow

Technic Pin Conne...

Part #: 32333 2× Black

Technic Beam 1 x ...

Part #: 32348 2× Black

Technic Beam 1 x ...

Part #: 32348 1× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32449 2× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32449 22× Black

Technic Beam 1 x ...

Part #: 32523 3× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32523 9× Black

Technic Beam 1 x ...

Part #: 32523 35× Yellow

Technic Beam 1 x ...

Part #: 32523 16× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 32524 2× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32524 45× Yellow

Technic Beam 1 x ...

Part #: 32524 17× Black

Technic Beam 1 x ...

Part #: 32525 5× Light Bluish Gray

Technic Beam 1 x ...

Part #: 32525 18× Yellow

Technic Beam 3 x ...

Part #: 32526 13× Light Bluish Gray

Technic Beam 3 x ...

Part #: 32526 30× Yellow

Technic Beam 3 x ...

Part #: 32526 10× Black

Plate Special 1 x...

Part #: 34103 1× Light Bluish Gray

Technic Driving R...

Part #: 35186 2× Yellow

Gear Shifter

Part #: 35188 1× Orange

Plate 1 x 3

Part #: 3623 1× Light Bluish Gray

Plate 1 x 3

Part #: 3623 1× Black

Technic Axle 4

Part #: 3705 26× Black

Technic Axle 6

Part #: 3706 7× Red

Technic Axle 8

Part #: 3707 11× Black

Technic Axle 12

Part #: 3708 5× Black

Plate 1 x 4

Part #: 3710 2× Light Bluish Gray

Part #: 3941 24× Black

Technic Connector...

Part #: 39793 6× Black

Technic Connector...

Part #: 39793 9× Yellow

Technic Beam Fram...

Part #: 39794 1× Black

Technic Pin Long ...

Part #: 39888 6× Tan

Plate Round 2 x 2...

Part #: 4032a 16× Black

Technic Beam 1 x ...

Part #: 40490 8× Light Bluish Gray

Technic Beam 1 x ...

Part #: 40490 7× Black

Technic Beam 1 x ...

Part #: 40490 9× Yellow

Technic Beam 1 x ...

Part #: 41239 11× Dark Bluish Gray

Technic Beam 1 x ...

Part #: 41239 3× Black

Tile 1 x 8 with G...

Part #: 4162 1× Black

Technic Beam 1 x ...

Part #: 41677 50× Black

Technic Wedge Bel...

Part #: 4185 6× Yellow

Technic Axle and ...

Part #: 42003 40× Black

Technic Axle and ...

Part #: 42003 2× Yellow

Technic Axle Conn...

Part #: 42135 4× Dark Bluish Gray

Technic Axle Conn...

Part #: 42135 8× Black

Technic Driving R...

Part #: 42195 2× Black

Technic Driving R...

Part #: 42195 10× Light Bluish Gray

Technic Tread Spr...

Part #: 42529 6× Yellow

Wheel 11 x 8 with...

Part #: 42610 24× Light Bluish Gray

Technic Pin 1/2 w...

Part #: 4274 32× Blue

Technic Pin Long ...

Part #: 42924 390× Blue

Technic Axle Pin ...

Part #: 43093 150× Blue

Technic Linear Ac...

Part #: 43097 6× Black

Technic Beam 1 x ...

Part #: 43857 4× Light Bluish Gray

Technic Beam 1 x ...

Part #: 43857 12× Black

Technic Beam 1 x ...

Part #: 43857 30× Yellow

Dish 3 x 3 Invert...

Part #: 43898 2× Red

Dish 3 x 3 Invert...

Part #: 43898 2× Black

Technic Axle 7

Part #: 44294 14× Light Bluish Gray

Technic Pin Conne...

Part #: 44809 2× Black

Technic Pin Conne...

Part #: 44874 7× Light Bluish Gray

Technic Axle 3

Part #: 4519 98× Light Bluish Gray

Technic Steering ...

Part #: 46490 2× Light Bluish Gray

Clutch Outer Side...

Part #: 46834 1× White

Clutch Inner Side...

Part #: 46835 1× Dark Bluish Gray

Technic Pin Conne...

Part #: 49130 2× Light Bluish Gray

Wire Clip with Ax...

Part #: 49283 2× Yellow

Wire Clip with Ax...

Part #: 49283 1× Green

Wire Clip with Ax...

Part #: 49283 1× Blue

Wire Clip with Ax...

Part #: 49283 2× Red

Technic Axle 16

Part #: 50451 2× Black

Tyre 14 x 6 Solid...

Part #: 50951 24× Black

Technic Steering ...

Part #: 52730 2× Dark Bluish Gray

Technic Steering ...

Part #: 52731 2× Light Bluish Gray

Technic Axle 8 wi...

Part #: 55013 4× Dark Bluish Gray

Technic Axle 5.5 ...

Part #: 59426 2× Dark Bluish Gray

Technic Axle Conn...

Part #: 59443 22× Dark Bluish Gray

Technic Axle Conn...

Part #: 59443 61× Black

Wheel 31 x 15 Tec...

Part #: 60208 1× Yellow

Technic Beam 1 x ...

Part #: 60483 7× Orange

Technic Beam 1 x ...

Part #: 60483 38× Black

Technic Beam 3 x ...

Part #: 60484 11× Yellow

Technic Axle 9

Part #: 60485 2× Yellow

Technic Pin with ...

Part #: 61332 707× Black

Plate Round 1 x 1...

Part #: 6141 2× Red

Plate Special 4 x...

Part #: 6179 1× Yellow

Technic Universal...

Part #: 61903 8× Light Bluish Gray

Technic Axle and ...

Part #: 61904 9× Dark Bluish Gray

Technic Pin Conne...

Part #: 62462 38× Yellow

Technic Pin Conne...

Part #: 62462 2× Flat Silver

Technic Gear Diff...

Part #: 62821b 1× Dark Bluish Gray

Tile 1 x 3

Part #: 63864 1× Black

Tile 1 x 3

Part #: 63864 1× Light Bluish Gray

Technic Axle and ...

Part #: 63869 15× Light Bluish Gray

Technic Beam 5 x ...

Part #: 64178 3× Light Bluish Gray

Technic Beam Fram...

Part #: 64179 6× Light Bluish Gray

Technic Beam Fram...

Part #: 64179 4× Yellow

Technic Gear Rack...

Part #: 64781 8× Black

Technic Panel 5 x...

Part #: 64782 6× Yellow

Technic Pin Long ...

Part #: 65304 20× Light Bluish Gray

Technic Pin Long ...

Part #: 65304 26× Red

Technic Axle and ...

Part #: 6536 34× Light Bluish Gray

Brick Round 2 x 2...

Part #: 65473 2× Black

Technic Pin Conne...

Part #: 65487 12× Black

Technic Pin Conne...

Part #: 65487 72× Yellow

Technic Pin Conne...

Part #: 65489 4× Light Bluish Gray

Technic Axle 3 wi...

Part #: 6587 4× Dark Tan

Technic Gear 12 T...

Part #: 6589 18× Tan

Technic Beam 1 x ...

Part #: 6629 11× Yellow

Technic Beam 1 x ...

Part #: 6632 4× Black

Technic Beam 1 x ...

Part #: 6632 27× Yellow

Technic Pin with ...

Part #: 66906 5× Red

Motor, Large Angu...

Part #: 69730 2× Dark Bluish Gray

Technic Axle and ...

Part #: 69819 8× Black

Technic Link Trea...

Part #: 69910 116× Yellow

Technic Beam 2 x ...

Part #: 71708 6× Yellow

Technic Panel 3 x...

Part #: 71709 15× Yellow

Technic Panel 3 x...

Part #: 71709 6× Black

Technic Beam 1 x ...

Part #: 71710 18× Black

Technic Beam 1 x ...

Part #: 73507 22× Black

Technic Steering ...

Part #: 77590 2× Light Bluish Gray

Sticker Sheet for...

Part #: 77607 1× [No Color/Any Color]

Hub, Powered Up 4...

Part #: 85824 1× Light Bluish Gray

Brick Sloped 30° ...

Part #: 85984 3× Light Bluish Gray

Tile 2 x 4 with G...

Part #: 87079 3× Light Bluish Gray

Technic Panel Fai...

Part #: 87080 2× Yellow

Technic Axle 4 wi...

Part #: 87083 26× Dark Bluish Gray

Technic Panel Fai...

Part #: 87086 2× Yellow

Technic Gear 20 T...

Part #: 87407 2× Light Bluish Gray

Technic Pin Conne...

Part #: 87408 4× Black

Plate 2 x 14

Part #: 91988 1× Light Bluish Gray

Technic Axle and ...

Part #: 92907 2× Black

Technic Axle and ...

Part #: 92907 2× Light Bluish Gray

Technic Gear 16 T...

Part #: 94925 14× Light Bluish Gray

Tile Round 1 x 1

Part #: 98138 10× Trans-Clear

Large Figure Weap...

Part #: 98585 6× Red

Technic Turntable...

Part #: 99009 4× Light Bluish Gray

Technic Turntable...

Part #: 99010 4× Black

Technic Beam Tria...

Part #: 99773 20× Yellow

This set is a goldmine for Technic builders, featuring a massive quantity of Technic pins and axles. The abundance of yellow Technic beams and panels makes it a great source for creating large-scale construction vehicle MOCs.

🛒 Where to Buy

eBay

✓ In Stock

$449.99 →

Walmart

✓ In Stock

Compare on eBay →

$474.99

Target

✓ In Stock

Compare on eBay →

$499.99

💎 Notable Parts

Yellow Technic Link Tread 7L Wide with Two Pin Holes (116x) $23.20

Blue Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot (390x) $19.50

Yellow Technic Beam 2 x 4 L-Shape Thick (49x) $2.45

Est. BrickLink Part Value

$45.15

💡 MOC Potential

🚗 Alternate construction vehicles (e.g., excavator, crane)

🤖 Industrial robot or machinery

🚗 Heavier modified D11 with different blade types

Community Insights

Real opinions from Reddit and YouTube

What Reddit Says

No Reddit discussions found for this set.

What YouTubers Say

1 video found

BlockTalk AI

Sariel's Bricks & Pets provides a comprehensive review of the 42131 Cat D11 Bulldozer, including a parts list and speed build, while comparing it to the 8275 Bulldozer. TTPM Toy Reviews praises the app-controlled functionality and detailed design but notes the need for 6 AA batteries and the high price point, giving it a 4.5/5 star rating.