Seres, partner of Huawei’s Aito, just patented a slide-out toilet for cars. Innovation or gimmick? Discover the details here!
Chinese automakers have already transformed the modern vehicle into a mobile living room, adding everything from giant cinema screens to high-end gaming consoles. Now, Seres—the production partner for Huawei’s Aito brand—is taking “convenience” to a whole new level by bringing the bathroom inside the cabin.
A Hidden Solution Under the Seat
In a move that has sparked both curiosity and controversy, Seres has officially been granted a patent for an integrated in-car toilet system. According to the patent filings, the design features a toilet body and a sophisticated rail system installed discreetly beneath the passenger seats.
The mechanism is designed for seamless use: when needed, the user simply slides the toilet out from under the seat via the rails. Once finished, the unit slides back into its concealed position, ensuring that the luxury interior remains sleek and unobstructed.

More Than Just a Portable Seat
This isn’t the first time the industry has toyed with the idea, but Seres is aiming for a higher level of integration. Unlike previous solutions—such as the one proposed by Polestone, which was essentially a removable seat cover stored in a center console—the Seres design is fully integrated into the vehicle’s chassis. This makes it a far more practical and discreet solution for those who dread long stretches without a restroom break.
The Engineering Nightmare: Space and Smell
Despite the mechanical ingenuity, moving this design from a patent to a production line is a daunting task. Engineers face several “deal-breaker” challenges:
- Space Constraints: Fitting waste tanks and plumbing into a car chassis is difficult, especially in Electric Vehicles (EVs) where massive battery packs already occupy most of the under-floor space.
- Odor Management: For a luxury car, the ability to completely neutralize odors is not just a feature—it’s a necessity. Even the slightest scent could ruin the premium experience for all passengers.
- Durability: The rail system must be robust enough to handle frequent use without rattling or breaking over time.
Gimmick or Game-Changer?
The announcement has split the automotive community into two camps. Critics argue that this is a classic “marketing stunt,” designed to grab headlines rather than solve a real problem. They question whether anyone truly wants to “relieve themselves” inside the confined space of a luxury vehicle.
On the other hand, proponents suggest it could be a lifesaver for specific scenarios, such as extreme traffic jams on highways or long-distance journeys through remote areas where facilities are non-existent.
Will It Actually Hit the Road?
Seres has not yet confirmed if this feature will appear in upcoming Aito models, such as the M7 or M9. However, industry experts predict that if the technology is ever commercialized, it will likely be offered as a high-end, personalized option for a niche group of buyers rather than a standard feature for every driver.

