Chinese automaker Seres has secured a patent for a unique and unconventional automotive feature—an “in-vehicle toilet.” The concept, which integrates a compact, retractable toilet system inside a car, highlights the growing trend among electric vehicle (EV) manufacturers to differentiate their offerings through innovative and sometimes unexpected features.
While the idea may appear unusual, it reflects the intense competition and rapid innovation shaping China’s EV market.
According to Seres’ patent filing dated April 10 in China, the feature is intended to "satisfy users' toilet needs on long journeys, while camping or while staying in the car". The design aims to provide added convenience for drivers and passengers, especially during extended travel or outdoor activities where access to facilities may be limited.
The patented system includes a toilet that can slide out from beneath a passenger seat. Users can deploy it either through a physical push mechanism or via voice commands, making it a hands-free and tech-enabled solution.
One of the core aspects of the design is its compact integration. When not in use, the toilet remains concealed beneath the seat, ensuring that it does not occupy additional cabin space. This approach allows the vehicle interior to maintain its standard layout and comfort.
The patent outlines a built-in fan and exhaust pipe system designed to channel odours outside the vehicle. This is a crucial component to ensure hygiene and user comfort within a confined cabin space.
The system collects waste in a dedicated tank, which must be emptied manually. Additionally, the toilet includes a rotating heating element that evaporates urine and dries other waste, reducing odour and improving sanitation.
Despite securing the patent, Seres has not confirmed whether it plans to include the in-vehicle toilet in any upcoming models. As with many automotive patents, there is no guarantee that the concept will be commercialised.
Automakers often file patents for experimental technologies that may or may not reach production. However, such filings offer insights into the direction companies are exploring as they seek to enhance user experience.
China’s EV market has become a hub for creative automotive features. Modern electric vehicles increasingly come equipped with advanced comfort and entertainment options such as massage seats, karaoke systems, and even built-in refrigerators.
With dozens of manufacturers competing for market share, companies are under pressure to stand out. This has led to rapid innovation, not only in performance and battery technology but also in lifestyle-oriented features.
Seres, headquartered in Chongqing, is known for producing electric sport utility vehicles (SUVs). Its subsidiary brand Aito has gained attention for combining smart technology with premium design.
While the majority of Seres’ vehicles are sold in mainland China, the company has expanded its presence to international markets, including Europe, the Middle East, and Africa. This global push reflects the broader ambitions of Chinese EV makers to compete internationally.
Although rare, in-vehicle toilets are not entirely new. They are more commonly found in long-distance coaches and luxury transport vehicles.
In the 1950s, a special version of the Rolls-Royce Silver Wraith reportedly featured an integrated toilet beneath the passenger seat, along with other high-end amenities like a television, according to auction house Sotheby’s.
China’s EV market has become highly saturated, with numerous companies competing aggressively. This has triggered a price war, significantly impacting profit margins across the industry.
While companies like BYD have emerged as global leaders, many smaller players are struggling to remain profitable. Analysts have warned that a large number of Chinese EV firms could face financial difficulties or even collapse in the coming years.
In this challenging environment, unique features—such as Seres’ in-vehicle toilet—can serve as differentiators, helping brands capture consumer attention and stand out in a crowded market.
Seres’ patented voice-controlled in-vehicle toilet is a striking example of how far automotive innovation is evolving in response to intense competition. While it remains uncertain whether the feature will ever make it into production vehicles, it underscores the creative approaches companies are exploring to enhance user convenience and redefine in-car experiences. As the EV market continues to expand and mature, such unconventional ideas may either shape future mobility solutions—or remain fascinating concepts that push the boundaries of design and engineering.