Customer reviews from LEGO
LEGO - Technic App-Controlled Cat D11 Bulldozer 42131
Average customer rating
4.4
(34 Reviews)
Rating breakdown 34 reviews
5 Stars
26
4 Stars
3
3 Stars
0
2 Stars
2
1 Star
3
82%of customers recommend this product.
(
28 out of
34)
Customer Reviews for LEGO - Technic App-Controlled Cat D11 Bulldozer 42131
Customer Rating
5
Great Fun
on November 28, 2021
Posted by: EnsignCapableMug
[This review was collected as part of a promotion.] I love the complexity of the App driven sets. They are always amazing.
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
5
Excellent kit!
on March 23, 2022
Posted by: Canblower1
First and upmost no missing parts! Excellent kit! I enjoy building big kits with lots of parts and operating gizmos. This is one of those! Realistic, lots of gears and intricate building sequence's. Took my time to build it and enjoyed every minute of it. Having built the Liebherr 9800 and the Off Road Crane 42082, this adds to my small collection of complex kits. If anything I would change would be the color of the threads: grey would have looked more realistic. The Iphone app is a little bit difficult to use and confusing at times. Overall it was a very satisfying building experience, a great build and can not wait for the next huge kit to come out.
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
5
Awesome build
on October 14, 2021
Posted by: Branson1586
It was a very enjoyable and challenging build. The incorporation an electric motor is impressive. Once the build is complete driving the model is a great experience. Works flawlessly. Definitely worth the money
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
4
Fun build, not so great value, clunky operation
on June 4, 2022
Posted by: MercifulArtist026
The overall building process was fun and varied, there’s lots of cool gearing and a few newer pieces as well as the new wide tracks.
The price is on the higher side for a large motorized set, at least compared to others like the 42100 liebherr excavator or the 42114 volvo 6x6.
The play is ok but clunky. Switching in between any of the non-driving actions takes several seconds (as I understand it, it’s to reduce tension on the gearbox by wiggling the motors) and also means that only one action can be done at once (not including driving). A little disappointing.
Overall, it’s a great building experience and looks fantastic as a display, but functionally and price-wise it’s slightly lackluster.
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
5
One of the best
on October 4, 2021
Posted by: JRYE
This is hands down one of the best technic sets to come out of LEGO. I'm a pretty advanced builder and an engineer by day so I'm very critical on my reviews. I haven't been a fan of the app controlled functions in the past however this has changed my mind. It was exciting to build, its HUGE, highly detailed, functions very close to the dozer in real life, and so easy to use with the app. It has just the right amount of power for full functionality, even the stairs are motorized. If you're on the fence I wouldn't hesitate to buy this right away.
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
5
WOW!!
on October 5, 2021
Posted by: WZ Studios
Okay, this is amazing. The LEGO Cat D11 is a must have for fans of heavy equipment and RC technology, and of course LEGO.
Building this large 18+ Technic set came with many quirks that only Technic has! Gears, pins,hydraulics, etc. It was a breeze to put together. I've had experience building large Technic sets like this and am season to know what to expect. If you're just getting into Technic go for something smaller first. Tryst me.
The RC capability is choice! This thing has some speed and torque! Realistic functions to the actual bull dozer! Lift up the blade, lower the ripper, and lower the ladder! Fantastic!
This set looks great when displayed to the Liebherr R9800 and Volvo 6x6.
It's a niche category for fans of the LEGO community. If you see it get it!
-WZ
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
4
The App is flawed, the Bulldozer is awesome
on December 27, 2022
Posted by: Kluski
The bulldozer itself is an amazing set. I thoroughly enjoyed building it and did not have a difficult time. In other sets, I have had trouble with pieces getting knocked off as I build, but this set was better. I also appreciate Lego and their customer support to help with missing pieces. Outstanding service.
However, I am thoroughly DISSAPPOINTED in the app controller.
1. You can't test the set until it is Fully assembled because the app wants to calibrate ALL the movements of the completed set. If you find an error after the set is built, you cannot reach the gearing areas where there is an issue. Your choice is disassemble the set or leave it dead.
2. If one action does not work, the calibration will not be completed. For example, in my case, the side ladder did not move in calibration. Therefore, the app could not finish the calibration process and now the bulldozer sits on the desk unable to move. I could care less if the ladder moves or not, but let me play with the rest of the features. Don't make the app and All-or-Nothing controller.
3. During calibration, the range of motion is excessive. In my set, the calibration started and moved the assembly in one direction. When it reached max, I would expect to hear a couple clicks of the gear as it maxes out. But nope, I heard click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click. That can't be good for the motors or the gears. I don't know why it needed to be pushed that hard during calibration.
4. The calibration would sometimes stop working at the end of certain steps and needed to be restarted. In my set, after the first motion was calibrated, I would just see the icon on the app rotating endlessly (like the spinning hourglass that resulted in nothing). There was no indication from the app on what was wrong or what needed to be done. Just a spinning icon and a Lego set laying dead on my desk. I had to go back and restart the calibration process again, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click,
1. You can't test the set until it is Fully assembled because the app wants to calibrate ALL the movements of the completed set. If you find an error after the set is built, you cannot reach the gearing areas where there is an issue. Your choice is disassemble the set or leave it dead.
2. If one action does not work, the calibration will not be completed. For example, in my case, the side ladder did not move in calibration. Therefore, the app could not finish the calibration process and now the bulldozer sits on the desk unable to move. I could care less if the ladder moves or not, but let me play with the rest of the features. Don't make the app and All-or-Nothing controller.
3. During calibration, the range of motion is excessive. In my set, the calibration started and moved the assembly in one direction. When it reached max, I would expect to hear a couple clicks of the gear as it maxes out. But nope, I heard click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click. That can't be good for the motors or the gears. I don't know why it needed to be pushed that hard during calibration.
4. The calibration would sometimes stop working at the end of certain steps and needed to be restarted. In my set, after the first motion was calibrated, I would just see the icon on the app rotating endlessly (like the spinning hourglass that resulted in nothing). There was no indication from the app on what was wrong or what needed to be done. Just a spinning icon and a Lego set laying dead on my desk. I had to go back and restart the calibration process again, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click, click,
My recommendations
1. Lego should rebuild the app so it is better and more accommodating.
2. Add the ability to test assembly motions with the controller in earlier stages. Add notes in the instruction manual to indicate; test here to expect to see xyz.
1. Lego should rebuild the app so it is better and more accommodating.
2. Add the ability to test assembly motions with the controller in earlier stages. Add notes in the instruction manual to indicate; test here to expect to see xyz.
I would recommend this to a friend!
Written by a customer while visiting LEGO
Customer Rating
5
New Item in the fleet
on October 6, 2021
Posted by: LegOlympian
Fantastic build & play ! I have four Volvo Haulers (different colors), a Liebherr excavator, the Rough Terrain Crane, the 4x4 Tow Truck and now this huge dozer! Each built exactly right the first time and those sets using the Control App worked perfectly at the start! Love my pseudo construction company, kudos Lego ! The key is to take a bit more time when building Technics that are App Controlled, accuracy is essential to reduce frustration and failure time !
I would recommend this to a friend!
Written by a customer while visiting LEGO