What if you could own a robot dog like those from Boston Dynamics at a fraction of the cost? The Unitree Go2 is an advanced, agile, and surprisingly affordable robotic companion. Built for practical applications such as research, education, surveillance, and exploration, it is carving out its own niche in the market with a starting price of 1,600 USD. In this price range, there are almost no comparable products to be found.
Recently, the iFixit team, known for their teardowns, turned their attention to this intriguing product. Unlike conventional smartphones or computers, this marks their first time disassembling and analyzing the Go2, a quadrupedal robot dog developed by China's Unitree Robotics. From its structural design and module installation to the utilization of its AI features, the team conducted a comprehensive evaluation of the Go2.
To get a deep look into the internal structure of the Go2, iFixit invited robotics expert Marcel Stieber to lead the teardown. Marcel brings over a decade of experience in consumer electronics and robotic systems engineering. He shares his professional insights in detail within this specially produced, long-form teardown video.
For tech enthusiasts, Marcel's deep-dive analysis is not to be missed. Let's take a look at the core structure and operating mechanisms of this robot dog through the lens of iFixit's experts.
A dedicated repairability scoring system for robot dogs has yet to be established, primarily because the number of samples disassembled is not yet sufficient. Nevertheless, the repairability of the Unitree Go2 can be rated favorably overall.
It gets off to a good start. Including replacement foot pads is a smart move, as small rubber pads are consumables and often a concern for wear and tear when evaluating repairability.
Speaking of consumables, the battery pack is also easy to replace. After removing it by hand from the side of the body and unscrewing a few screws to open the case, you can see the battery pack itself and its independent management board. Inside, standard 2000mAh 18650 cells are arranged.
| Leg structure: Replaceable, but with hurdles
We didn't completely remove the legs during this teardown, but it appears to be designed for replacement. However, obtaining replacement parts is not straightforward. The official website only has an inquiry form, and you cannot order parts directly. We have contacted Unitree regarding the purchase of spare motors and leg parts, and we plan to update this information once we receive a response.
One feature worth noting is the connection design between the leg and the hip joint. Metal meshes with metal to transmit the primary forces. A critical protective mechanism is the plastic locking ring. If an unexpected force is applied to the leg—for instance, too much force directed outwards—this plastic component, which we hope is relatively inexpensive, will break first, shielding the expensive metal structure and motors from damage. Using a Lumafield CT scanner, we were able to see through the internal structure of the leg:
| Main board: Tucked away, but connections are clear
As expected, the main board is tucked away under layers of protection. On the other hand, the modular design is a positive; there are many connection points on the board, making individual repairs easier. Each motor is connected independently, and many components are clearly labeled.
Of course, there is a generous amount of tape, silicone, epoxy, and adhesive used. This is a reasonable reinforcement method for a device that needs to withstand repeated impact and intense vibrations. Once you learn the tricks for disconnecting these, disassembly becomes much smoother.
| LiDAR:The "eye" tucked deep inside
One of the key features of the Go2 is its built-in LiDAR. It emits laser pulses and captures the reflections from its surroundings to assist with navigation. It can "see" obstacles and create a map of its environment, a mechanism that achieves the depth perception of human eyes through advanced technology. However, it was somewhat surprising that the LiDAR sensor was embedded deep within the main frame. This makes repair or replacement more difficult than one would like. Fortunately, the sturdy metal casing provides solid physical protection.
However, behind its impressive performance lie some design concerns. The neck area is relatively weak, and for a robot expected to encounter frequent collisions, long-term durability is questionable. Upon opening the casing, we found cracks in the neck area resulting from the stair test, which substantiated our concerns.
I Conclusion: An explorer with a unique standing
The Unitree Go2 carves out a clever position between research tools and general consumer electronics. It is neither a pet nor a high-end industrial robot like the Boston Dynamics Spot (starting at 75,000 USD). Of course, at a fraction of that price, one cannot expect the same level of capability. For robotics enthusiasts, however, it offers an exciting and relatively accessible platform.
We would like to express our gratitude once again to robotics expert Marcel Stieber for providing professional assistance with this detailed teardown. Please be sure to watch the full teardown video for more in-depth content.
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