A recent public outcry has thrust a term once buried in specification sheets—zero-gravity seats—into the spotlight, now framed by a "safety controversy."
A viral showroom clip recently pushed the safety of "zero-gravity seats" to the top of trending searches. In the footage, an adult uses a voice command to activate zero-gravity mode in the driver's seat of a Stelato S9. The front passenger seat immediately begins to fold, trapping—and crushing—a child sitting there.
Harmony Intelligent Mobility Alliance (HIMA) responded by claiming "the scenario did not reach the trigger threshold for the anti-pinch function," yet the explanation did little to quell public doubts.
Behind the industry fervor lies a darker reality: as zero-gravity seats proliferate, the sector is sprinting ahead while safety standards and testing protocols lag dangerously behind.
Gasgoo has learned that the risks of zero-gravity seats extend far beyond pinching hazards. The "passive safety risks" during a collision are far more lethal.
As seat posture shifts from "sitting" to "lying down," the industry's race for comfort has racked up a safety debt that is now coming due.
Bridging that gap requires a fundamental realization: post-transformation, safety no longer depends on a single manufacturer's parts, but on the synergy of the entire system.
Zero-Gravity Seats: Standard on Over 100 Models
The Stelato S9 is hardly the only model featuring zero-gravity seats.
Among recent launches, from the Dongfeng Nissan NX8 and Buick Zhijing E7 to the NIO ES9, Voyah X8, and XPENG GX, zero-gravity seats have effectively become a "must-have" feature.
Data from the China Automotive Engineering Research Institute shows that in 2022, only 32 models in China offered zero-gravity seats. By 2024, that figure surged to 117—a nearly 2.7-fold increase in two years. At the same time, the feature has trickled down rapidly from the 300,000 yuan price bracket to models under 200,000 yuan, pushing overall penetration above 5%.
The technology behind zero-gravity seats stems from NASA research on the human body's natural posture in microgravity. By reclining the backrest to roughly 120 to 128 degrees while elevating the legs to heart level, spinal pressure drops significantly, allowing muscles and bones to fully relax. This is the so-called "zero-gravity posture." For long-haul travel, the comfort improvement is a game-changer.
Image Source: Stelato S9
Yet the path to proliferation is rarely driven by consumer demand alone; it is often the result of fierce competition on the supply side.
Cui Dongshu, Secretary-General of the China Passenger Car Association (CPCA), told Gasgoo: "Zero-gravity seats becoming standard is essentially a rat race in comfort features."
He noted that with powertrains and smart features becoming homogeneous, zero-gravity seats emerged as a low-cost tool for automakers to elevate positioning and craft marketing hooks, quickly filtering down from premium models to mass-market family cars.
In China's current NEV market, "refrigerators, color TVs, and big sofas" are the three benchmarks for cabin luxury. Once a leading automaker adopts zero-gravity seats as a core selling point, rivals have little choice but to follow. The result of this "features arms race" is that zero-gravity seats have leaped from a novelty to a standard feature in just a few years.
Gasgoo Global Automotive Industry Big Data notes that as manufacturing becomes more premium, personalized, and flexible, China's seat supply chain is shifting toward systemization, integration, and customization. Zero-gravity seats are central to this high-end, intelligent evolution.
Cui also emphasized a critical caveat: "Recent pinching accidents expose a lack of intelligence—crude anti-pinch sensors, blind spots in child detection, and high collision risks for reclined postures while driving."
A pressing question is emerging: As car seats shift from "sitting" to "lying" configurations, evolving from fixed structures to complex, multi-directional electric systems, have safety standards kept pace?
"For Parking Only": Behind Comfort, A Safety Debt Awaits Repayment
The dangers posed by zero-gravity seats run far deeper and are more complex than a single showroom video suggests.
The Stelato S9 incident highlights a primary gap: the lack of active safety standards.
Currently, there is no unified national standard for the anti-pinch functionality of electric zero-gravity seats. Automakers set their own trigger thresholds—some relying on current detection, others on pressure sensors. A threshold set too tight causes false alarms; one too loose risks pinching a child.
In the Stelato S9 case, HIMA's defense that "the threshold was not reached" exposes a fundamental misalignment between an automaker's internal settings and public safety expectations.
The current national standard, GB 15083-2019 ("Strength Requirements and Test Methods for Automobile Seats, Seat Anchorages, and Head Restraints"), focuses primarily on structural strength and passive safety. It remains largely silent on emerging issues like electric anti-pinch functions, voice control logic, and posture locking for intelligent seats.
Yet, the threat of pinching pales in comparison to the "passive safety risks" zero-gravity seats pose during a collision.
Image Source: XPENG X9
In fact, long before this controversy erupted, a senior executive at ZF Lifetec had already flagged the risks of zero-gravity seats in interviews with Gasgoo and other media outlets last year.
According to the executive, every mass-produced model currently featuring zero-gravity seats carries the same disclaimer in the owner's manual: for use only when parked.
"If you use it while driving, it's on you. It's not safe," the ZF Lifetec executive stated bluntly. "We've run the tests. The spinal injury is equivalent to jumping from a fifth-floor window. It is fatal."
The core issue is the failure of the seatbelt system once the seat posture shifts. In zero-gravity mode—with the backrest deeply reclined and legs elevated—the occupant's posture changes fundamentally. The design premise of traditional three-point seatbelts, which assumes an upright seated position with a locked pelvis, effectively collapses.
As ZF Lifetec explains: "When you sit, the belt holds you to the seat. When you lie flat in zero-gravity mode, you are effectively unrestrained and shoot forward. The belt can't hold you. The spinal injury results from compression—the head and entire torso are crushed together, placing immense pressure on the spine."
Automakers have a duty to inform consumers that this feature is strictly for parking breaks, not for driving. Yet reality tells a different story: many models lack clear restrictions in the user interface, with some even allowing zero-gravity adjustments while the vehicle is in motion.
Image Source: Yanfeng
The issue has drawn attention at the national level. Last year, regulators including C-IASI and CATARC formed working groups to study how to ensure safety for occupants in deeply reclined seats.
The revised national mandatory standard, GB 15083, reportedly clarifies the definition of zero-gravity seats, maximum recline angles, and requirements for integrated seatbelts.
However, the revision won't be finalized until the fourth quarter of this year at the earliest, with implementation still a ways off.
"The industry lacks unified mandatory standards," Cui said. "Some automakers prioritize gimmicks over safety, piling on features without implementing proper scenario-based protection."
He emphasized that curbing this chaos requires a two-pronged approach: automakers must hold the line by optimizing protection for deep reclines while driving, upgrading multi-sensor anti-pinch tech, and refining emergency stop logic. Simultaneously, national standards need updating to define recline angles, anti-pinch thresholds, and occupant protection. Crucially, automakers must be transparent about usage restrictions—especially for children. The comfort race cannot come at the cost of safety.
Addressing the risks of reclined postures in smart cabins, Geely has debuted a comprehensive zero-gravity seat protection system on the smart #5. By using integrated seatbelts and seat airbags, the system effectively mitigates injury risks for reclining occupants.
Seat Supply Chain Revolution: The Core of Safety is System Integration
The rise of zero-gravity seats represents more than a consumer spec bump; it is a profound revolution in the automotive seat supply chain.
The traditional seat assembly market has long been dominated by four giants—Adient, Lear, Toyota Boshoku, and Faurecia—which control 68% of the global market. These companies bring decades of experience in frames, foam, trim, and mechanisms, prized for their reliability and scale.
But the arrival of electric vehicles is disrupting this status quo.
Electrification has sparked a surge in demand for seat electronics. Zero-gravity seats integrate multiple motors, sensors, control modules, and communication units, transforming the seat from a purely "mechanical assembly" into an "electromechanical terminal." Traditional mechanical adjusters and slides must now deeply couple with electronic control systems, while frame designs require rethinking load paths. This places new demands on the electronic capabilities of traditional suppliers.
Image Source: XPENG X9
Intelligence demands that seats become part of the cabin ecosystem. When memory, welcome, and zero-gravity functions link with the vehicle's voice system and domain controller, suppliers are no longer just "building chairs." They must co-define hardware interfaces, communication protocols, and control strategies with automakers.
This shift from "selling hardware" to "selling systems" signals a move away from simple Tier 1 supply models toward deeper joint development.
Enterprises cannot rely solely on disclaimers in user manuals to dodge liability for zero-gravity seat safety; they must provide hardware-level solutions.
ZF Lifetec, for instance, employs a solution that integrates the seat into an energy management system. Crucially, this requires deep cooperation between ZF and major seat suppliers—individual parts cannot solve the problem; deep system integration is mandatory.
This shift from passive to active protection is driving a technological upgrade across the entire seat supply chain.
Suppliers can no longer focus solely on frame strength and materials. They must now master sensor fusion, real-time control algorithms, and system integration.
Gasgoo Global Automotive Industry Big Data shows that as of last October, only 17 companies operated in the zero-gravity seat sector, accounting for just 0.51% of the total. The report notes that R&D and production in this niche demand exceptional capabilities in ergonomic design, intelligent module integration, and high-end comfort materials.
With NEV penetration rising, China's seat demand is shifting from "value-driven" to "experience-driven," offering a rare window of opportunity for local suppliers.
Yet, rising safety standards and technical barriers mean only suppliers with genuine system integration capabilities will survive the long haul.
Image Source: Yanfeng
Domestically, Yanfeng stands out as the most representative supplier. Its "Zero-Pressure Seat" line, based on NASA's zero-gravity principles, integrates ventilation, heating, massage, and multiple postures. It is already equipped in several mainstream NEV models.
Ultimately, the controversy surrounding zero-gravity seats may prove beneficial. It has forced the industry and the public to confront two realities:
First, the comfort benefits are real and well-deserved. Second, comfort cannot come at the expense of safety. Current industry standards and verification systems are under immense pressure to catch up with the breakneck speed of innovation.
Conclusion:
From the Stelato S9 showroom controversy to hidden hazards in existing models, and on to the revision of national standards and C-NCAP protocols, the zero-gravity seat saga is far from over. It serves as a reminder to automakers, suppliers, and regulators that car seats have evolved from "sofas" into complex, intelligent safety components. Technology may advance rapidly, but standards and safety cannot remain perpetually reactive.
As more consumers begin to "lie flat" in zero-gravity seats, the industry must ensure they are reclining on a truly safe foundation.
