Soon you won’t need to exit your car for bathroom breaks during road-trips

A new patent from Chinese electric vehicle maker Seres seeks to solve one of road travel’s most universal problems: finding a bathroom when you really need one.

According to the BBC, Seres, an automotive brand known for producing electric SUVs and developing advanced in-vehicle technology, filed a patent for an “in-vehicle toilet” system designed to be built directly into a passenger car cabin. The patent was authorized earlier this month 

The concept, recently reported through Chinese patent filings and industry coverage, envisions a compact toilet unit that can slide out from beneath a passenger seat when needed and retract when not in use.

According to patent details, the toilet would be installed under the front passenger seat and remain hidden during normal driving. When activated through a voice command or physical button, the unit would slide out on rails into a usable position inside the cabin.

The design is meant to conserve space, a major constraint in modern electric vehicles. When stowed, the toilet would not meaningfully reduce seating or cargo capacity, functioning more like a concealed compartment than a permanent fixture.

Yeah, but what about the smell?

To solve smell issues, the system also incorporates odor-control ventilation, including a fan and exhaust setup intended to manage airflow, along with a waste storage tank that would need to be emptied manually. The patent also describes a heating or drying function intended to reduce moisture and improve hygiene after use.

Seres has not confirmed whether the system will ever be installed in production vehicles. Like many automotive patents, it may remain a conceptual design rather than a commercial feature.

What is Seres?

Seres is a Chinese automotive manufacturer focused on new energy vehicles and intelligent mobility systems. The company is part of China’s rapidly expanding electric vehicle sector, competing with both domestic and international brands by emphasizing software integration and in-cabin technology.

Its lineup of electric SUVs and partnerships within the broader Chinese EV ecosystem have helped position it as a growing player in the global shift toward electric mobility. The in-vehicle toilet patent fits into a broader strategy of reimagining cabin space and long-distance comfort.

While an integrated toilet in a passenger car is unusual, it is not entirely without precedent. Recreational vehicles and long-haul buses commonly include onboard bathrooms, though these are typically reserved for much larger platforms with dedicated plumbing systems. Another Chinese brand, Polestone, recently introduced a “portable” in-car toilet that uses disposable bags.

In passenger cars, full toilet systems are rare due to safety, sanitation, and space limitations. However, automakers have increasingly explored comfort-focused innovations aimed at long trips and autonomous driving scenarios.

Recent examples include reclining “rest mode” seats in electric vehicles, climate-optimized camping modes such as those in the Tesla Model Y, and increasingly sophisticated driver-assistance systems that reduce fatigue on highways. Luxury vehicles have also introduced features like built-in refrigeration compartments and advanced air filtration systems designed to enhance cabin livability.

Taken together, these developments reflect a broader industry trend: treating the car interior less as a traditional cockpit and more as a flexible living or resting space.

For now, the Seres in-vehicle toilet remains a patent rather than a product commitment. Whether it reaches production will depend on engineering feasibility, regulatory approval, and consumer interest. Still, the concept highlights how far automakers are willing to push interior innovation as electric vehicles reshape what long-distance travel inside a car can look like.