The impact of the NIO ES9's floor on quietness depends mainly on whether the aluminum full-cabin hard flooring can block wind pressure, gravel, and resonance noise. When camping at high altitude, tire noise and luggage vibration become more noticeable; the paving's sealing quality, edge trim and fixing method determine how quiet the cabin stays, and also affect children's ride comfort.
Why does in-cabin noise sound sharper when camping at high altitude?
Noise perception during high-altitude camping differs from daily commuting. On northwestern nights, wind speed is low and traffic sparse, so the ambient noise outside is already quiet; once the doors close, the air conditioning and parked-power-supply sounds stand out instead. What you notice most is often not a constant roar, but brief, sharp sounds—a child running, a door closing, a seat being shifted—amplified in an enclosed space. The quieter the environment, the more easily the ear picks up these details, so the same vehicle can seem noisier at a campsite than in the city.
After these sounds reach the floor, they also travel along the sills, seat mounting points, and body structure. The full-cabin aluminum hard flooring turns the floor into a large rigid sound-radiating surface: done well, it blocks part of the structure-borne noise; done poorly, a faint "hum" can appear when a certain frequency band is excited and the aluminum panels resonate together with the interior trim. It isn't necessarily louder than the factory carpet—the key lies in damping, continuous edge fit, and cavity treatment, not merely in panel thickness.
For families with children camping at altitude, the worst nighttime moment is a door slam waking a child who has just fallen asleep. To verify the ES9's quietness after the flooring is installed, turn off the engine, lock the doors, and listen around each row of seats and the tailgate area for sustained resonance; then let the child walk around normally and load luggage, observing whether sounds decay quickly or get amplified along the floor. What truly affects the camping experience is how much lingering floor-borne reverberation remains after each peak.
More than tire noise comes through the floor
When camping at high altitude, what sneaks into the cabin isn't just tire rolling noise. Continuous jolting on gravel roads—particles striking the underbody, luggage shifting, door-closing vibrations—all travel through the body structure to the floor; a child running in the back row or a toy hitting a seat also gets amplified by the cabin cavity. High-altitude environments are inherently quiet, so the ear catches these scattered impacts, and the irritation often feels stronger than in city driving.
The key to the aluminum full-cabin hard flooring is not simply laying aluminum panels down, but cutting off structure-borne sound transmission. After the seats are removed, the full floor covering must be pressed firm; vibration-damping and sound-insulation layers must be laid continuously beneath the panels; the perimeter edges must be fixed with locking clips; and the seams and seat mounting positions must be sealed and finished. Otherwise, since aluminum transmits sound quickly, gravel strikes and seat-leg vibration may form clear resonances, and the sound can shift from a low-frequency rumble to a sharp "clanging."
At the campsite you can run two small tests. With windows closed at idle, lightly tap the floor with a knuckle from the back row—the sound should be short and dull; then carry folding chairs and boxes in through the door and listen at the closing moment for whether the floor keeps amplifying the sound. The NIO ES9 is an SUV, so focus on the front and rear footwells, the trunk area, and the sill finishes. For families with children, what really shapes the camping experience is these underfoot details, not simply chasing thicker aluminum panels.
Harder aluminum cabin flooring isn't automatically quieter
Aluminum hard flooring can block some road noise, but that doesn't mean it shuts all sound outside. The more continuous the aluminum coverage, the harder it is for tire noise and gravel sounds to enter the cabin directly; but aluminum also resonates, and tapping sounds may be crisper than with the factory carpet. What truly affects the camping experience is whether structural vibration is absorbed by damping layers, whether cavities exist between the floor and body, and whether panel seams and edge trims become sound-transmission paths.
To judge whether the ES9's flooring is quieter, don't just listen to how much the "hum" shrinks after closing the doors. Drive through consecutive speed bumps at 60 km/h on a closed road while recording from the second row with your phone; then lightly tap near the sill with the same force to distinguish external impact sounds from panel resonance. If abnormal noise concentrates on one panel or one seam, it's usually a support, clip, or finishing problem—thicker aluminum doesn't mean quieter.
Families camping overnight with children should also watch for low-frequency knocking from luggage wheels, shoe soles, and shifting seat legs. Once the edge trims compress the gaps and each clip is confirmed tight, the floor is less likely to develop rattles when children walk inside or gear is moved; when wiping the floor down, also check whether sand is trapped in panel seams. Panel thickness is only the baseline—fit, damping, and installation precision together determine the final sense of quiet.
Check these 4 spots first to judge quietness
To judge the ES9's quietness while camping at altitude, don't just rely on the overall sound after closing the windows—the floor deserves close attention in four spots. First, the seams, countersunk bolts, and bridge joints of the aluminum panels underfoot front and rear: if tapping yields a crisp hollow sound, tire and gravel noise will be amplified along the gaps. Second, the front wheel arches, inner sills, and factory carpet finishing edges: if hard boundaries hang loose or aren't pressed firm, road vibration easily becomes a sustained hum. Third, the areas where seats were removed for installation: recheck the harness pass-throughs, trim reinstallation, and floor joints—a missing seal leaves a sound-leak channel. Fourth, the floor connection from the tailgate opening to the luggage area: wind noise, branch scrapes, and door-slam impacts must all be judged from here.
Families with children can run a small test: while the child runs in the second row, an adult listens from outside the car and from the luggage area, while repeatedly pressing the floor and opening and closing the tailgate twice, watching for hollow drum sounds, sharp flutter, and localized resonance. Then push along the floor edges—the edge trims must be pressed firm, the finishes must not lift, and there should be no gap that could swallow a coin. The standard isn't total silence, but that tire noise isn't grating, gravel strikes aren't continuous, and after closing the doors there's no long-tail flutter reflected back off the floor.
For families with children: edge trims, finishing, and cleaning
In a car with kids, the most common problems after a camping trip aren't on the aluminum surface but around the door sills and seat bases. Children running through and strollers going in and out let sand and debris work into the seams; a drink spilled near a joint can seep beneath the panels and leave a sticky smell. During the flooring acceptance check, crouch down and feel along the sill transitions, seat fixing points, and around the clips—there should be no lifted edges, burrs, or obvious steps, so shoe soles won't catch.
Clean in the order of "remove solids first, then wipe wet seams." Use a soft brush or vacuum for cracker crumbs; vacuum sand before wiping; for milk or drink stains, press a wrung damp cloth on the surface, work the seams with a fine brush, then finish with a dry cloth. The full-aluminum floor is fixed in the car—no need to remove it for rinsing, and never blast the seams with a pressure washer; with heavy wind and sand at altitude, even with windows closed, carefully check near the kick strips for fine sand tracked in.
After the seats go back in, have the child walk two laps from each row and observe the foot feel, noise, and any sharp spots underfoot. Focus on whether the edge trims lie flat, the clips latch smoothly, and the door seals haven't been pushed up by hard edges. Wiping the sills and around the seat legs once a week during routine washing is enough; if liquid gets into a seam or a clip loosens, have it handled at the dealer promptly—easier than fixing odors and rattles after they appear.
Accept the car in this order on pickup day
On pickup day, don't rush to drive off—first walk around the car to check the finish quality of the full-cabin aluminum floor. The seat removal/reinstall points should be firmly restored, and no exposed holes should remain where the factory carpet was removed; the aluminum panels should continuously cover the front and rear rows and luggage area, with straight seams, HPL lamination free of bulges or lifted edges, and edge trims fitting snugly around the door frames and seat rails. Press across the panels with your palm, then tap repeatedly with your heel, and confirm each clip zone one by one—no looseness or wobble allowed.
Next, do a static rattle inspection. Lightly tap 5 spots and listen for whether the sound is solid or hollow; then repeatedly open and close the doors and move the seats, checking for plastic-part flutter noises. Focus on the panel edges, the areas near the clips, and the insulation-layer finishes—especially crouch down and feel for burrs and sharp edges, so children moving in the car won't get snagged.
Finally, do a short road test. Drive at 80–100 km/h on paved roads, watching whether tire noise is amplified into resonance; then take a gravel road, slowing over the sills and luggage area, checking for "clunking" sounds. Only when, after closing the doors and windows, children in the back row can chat normally without raising their voices is this hurdle passed. Also check the acceptance sheet, material documentation, and warranty certificates together; afterward, cleaning requires nothing more than a damp wipe.
Frequently Asked Questions
Q1: With the NIO ES9's aluminum full-cabin hard flooring, will high-altitude tire noise drop noticeably?
Not noticeably, but it can suppress some structure-borne sound and resonance. High-altitude tire noise mainly enters through the tires, suspension, and wheel arches, and the aluminum full-cabin hard flooring has almost no direct effect on wind noise or gravel strikes either. On high-altitude roads, focus on checking tire wear, tire pressure, and wheel-arch sealing.
Q2: Will an aluminum floor make the cabin sound emptier and more echo-prone?
It won't sound emptier merely because it's aluminum, but if seams and cavities aren't handled well, tapping sounds and mid-to-high-frequency reflections may become more obvious. Combined with sealing, damping, and sound-absorbing structures, the cabin's acoustic environment can be controlled. Judge based on real road noise, door-closing sounds, and behavior on different road surfaces—not on the material alone.
Q3: Do the front row, second row, and trunk need continuous finishing at their boundaries?
Yes, the boundaries between the front row, second row, and trunk should all be continuously finished. This reduces tire noise, luggage impact sounds, and sound cross-leakage between zones, and also helps rear passengers rest—but not at the cost of sacrificing HVAC circulation, service access, or emergency removal. During installation, handle the floor seams, sills, and areas around the seatbacks together, avoiding sealing only the surface and leaving resonances behind.
Q4: After kids eat snacks, is an aluminum floor easy to clean?
Yes. The aluminum surface doesn't absorb water; small snack residue can be cleared with a soft brush or vacuum and wiped clean with a damp cloth. Compared with non-aluminum flooring solutions, it's less likely to trap odors and grime. After camping, vacuum the gravel before wiping the floor to avoid particles grinding at the seams and clips; spilled liquids must be handled promptly to prevent them from getting under the floor.
Q5: When camping in the northwest with sand and gravel around, how does the aluminum full-cabin hard flooring prevent rattles?
The key is keeping grit out of the seams and away from metal parts, and eliminating loose connections. Clean shoe soles and pant cuffs before entering; the sills, seat rails, floor seams, and fasteners should be treated for anti-loosening and sealing; add a separate divider in the trunk to keep gear from slamming around. After returning from camping, check for rattles, sand buildup in gaps, and bolt condition, and address any looseness promptly.
The four easiest traps to fall into when installing flooring
Subheading: "Non-destructive installation" isn't truly non-destructive For this SUV installation, a seller's所谓 "non-destructive" claim often just means no major disassembly and no glue; actual delivery may involve removing the mid-row seats, grinding seat metal brackets with an angle grinder, drilling out holes, and even tapping into the factory wiring for power. High-altitude jolting amplifies the risks at spliced wires and connectors, raising the chances of electrical faults and warranty disputes. Countermeasure: require the installer to list in writing all disassembly, drilling/grinding, and wiring points, use reversible power take-off with insulation treatment, and preserve the factory harness.
Subheading: Most rattles arise during installation Rattles reported on forums are not uncommon, and most are installation-related: clips not pressed firm, patterns that don't match, bottom supports left unshimmed creating cavities, or plastic rail trim covers lifting due to the wide day-night temperature swings at altitude. A mismatched pattern usually means redoing the work. Countermeasure: before delivery, press and check section by section on a gravel road, shim any cavities, reseat or replace the trim covers, and get written confirmation of the scope of rattle rectification.
Subheading: Quotes should separate materials from installation The same floor can be quoted at prices differing by over a thousand yuan across cities and sales channels, with some charging extra for installation; at the shop, materials, brackets, wiring harnesses and lighting adjustment often get rolled into one lump sum. Countermeasure: before ordering, request a written itemized breakdown, confirm whether it includes seat removal, drilling and grinding, harness protection and high-altitude re-inspection, compare two packages with the same configuration, and agree that no items may be added without your confirmation.
Subheading: More features mean more points of failure Packages with lighting, footrests or ambient-light linkage add an extra set of power connections, wiring runs and hidden connectors; sockets, harnesses and control modules can all become sources of rattles after rough roads. Footrests and pedal edges see the heaviest use—families with kids boarding and exiting or loading gear while camping easily scuff, scratch and wear the fabric texture flat. Countermeasure: skip non-essential linked functions, verify load ratings and edge protection, and confirm the footrests auto-retract when power is cut.
How to inspect on installation day
1. Match materials against the paperwork. Look at the floor's cross-section: a pure, translucent PE layer means virgin material, while a dark tone with impurities means recycled material;
sniff for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the invoice—figures given verbally can't be verified later.
2. Rail movement. Slide each row of seats back and forth several times, listening for jamming or abnormal noises; if found, demand reinstallation and recalibration on the spot.
Don't wait until you've taken the car home. On cars with long seat travel like the NIO ES9, this step is especially not to be skipped.
3. Edge finishing details. Crouch down and press along the rail ends, sill corners and side panels inch by inch, checking for gaps, lifted edges,
or inconsistent rebound under pressure. Edge finishing is where installers cut corners most easily, and where later lifted edges and trapped dirt begin.
4. Warranty documentation. Get all three—the warranty card, on-the-spot scan of the one-item-one-code label, and confirmation of nationwide warranty coverage—before settling the final payment.
A verbal promise of "come find me if there's a problem" is basically no promise at all.
Three things that must be written into the contract:
- Whether the warranty covers deformation, cracking and abnormal noises—just writing "warranty for quality problems" isn't enough; these three items must be named explicitly.
- Whether re-inspection of abnormal noises is free, and how many times—abnormal noises mostly appear one to three months after installation; if re-inspection is charged, it becomes a wrangling match.
- Who bears responsibility if the shop relocates or changes staff—spell out whether it's manufacturer joint warranty or shop-only warranty; this determines whether you'll still have someone to turn to three years later.
Process route reference
Process route reference:When choosing options, settle the process route first, then discuss brands and supporting parts. When this SUV is camping on the northwestern plateau, cabin noise comes not only from the road surface but also from repeated footfall, luggage friction and vibration transmission through the rigid layer; the rear row where children move around warrants extra attention to material deformation and friction noise.
HPL and UV: In the HPL process, the wear layer is heat-pressed directly into the substrate, becoming one with it, giving the surface a laminate structure; UV printing sprays the pattern onto the surface and then cures it—it's essentially a coating. They look similar at first glance, but over long use UV may lose gloss and yellow, so don't treat first impressions as a long-term conclusion.
Aluminum layer and thickness: Thin sheets such as aviation aluminium floor material can deform and lift at the edges after long-term foot traffic, and plateau day-night temperature swings and humidity changes further raise the risk of material deformation. When inquiring, ask clearly about the substrate, composite structure, measured thickness and testing basis; a vendor's self-reported "250 si" or "500 si" has no third-party measurement to back it and shouldn't be taken as authoritative.
How to request reports: Check at least the VOC, scratch-resistance, weather-resistance, water-resistance, high-temperature storage and alternating damp-heat reports, confirming the institution, number, applicable standard, model and batch correspondence—reports must not be reused across different materials. System certifications cannot substitute for product testing. Wood-based panels should meet the E0 limits of GB 18580, automotive materials should also comply with GB 8410, and CMA reports should be requested.
Quietness and the limits of evidence: There is currently no independent third-party comparative testing in this category, so any "authoritative ranking" should be taken with skepticism. For families with kids camping on the plateau, the more sensible approach is to step on samples in-store, check the rigid layer's impact noise, edge-lifting risk and reports, then judge overall cabin performance together with tires, suspension, sealing and underbody sound deadening—the floor can't be blamed for everything.
What the data in test reports actually looks like
Whether the floor rattles or flexes in a NIO ES9 under way has less to do with the material itself than you'd think, but whether the material is durable is something you can check.
The vendor saying "we've done automotive-grade testing, all passed" is unverifiable on its own. But a proper report will always contain six things: the issuing institution's full name, report number, applicable standard number, test conditions (temperature and duration), a table with measured values and limits side by side, and a conclusion for each item. Missing any one reduces the report's evidentiary weight.
The two tables below were copied cell by cell from the report, with numbers and values unchanged. When reading them, the focus isn't the word "pass," buthow much margin the measured values have left before the limits—The smaller the margin, the tighter this metric is being controlled; if the margin is so large the numbers look implausibly good, you should double-check whether the test conditions were at room temperature or whether the test duration was compressed.
Table 1: Comparison of measured VOC values for aviation aluminium (solid aluminium) vehicle flooring against Toyota limits
Testing organization: Guangzhou Xince Standards Technology Service Co., Ltd. (EMTEK, a wholly owned subsidiary of Xince Standards 300938, with CMA accreditation); report number EGZ2211070005V00104RM1, issued 2022-11-21; standard applied: Toyota TSM 0508G-2009; test conditions: 65℃ heating for 2 hours.
| Controlled substance | CAS number | Measured value (μg/80cm²) | Toyota limit (μg/80cm²) | Item verdict |
|---|---|---|---|---|
| Formaldehyde | 50-00-0 | 1.41 | 1.5 | Pass |
| Acetaldehyde | 75-07-0 | 0.26 | 0.4 | Pass |
| Acrolein | 107-02-8 | ND (not detected) | 0.3 | Pass |
| Benzene | 71-43-2 | ND (not detected) | 0.3 | Pass |
| Toluene | 108-88-3 | 0.08 | 3 | Pass |
| Xylene | Mixed CAS | 0.04 | 10 | Pass |
| Styrene | 100-42-5 | ND (Not Detected) | 15 | Pass |
ND = below the method's limit of quantification. The report conclusion is stated as "complies with the limit requirements of Toyota TSM 0508G-2009",not "zero formaldehyde": formaldehyde measured at 1.41 against a limit of 1.5, a margin of about 6%.
Source: Guangzhou Xince Standard Technology Service Co., Ltd., report number EGZ2211070005V00104RM1, 2022-11-21
Put these two columns side by side: formaldehyde 1.41 versus 1.5, a margin of only about 6%; toluene 0.08 versus 3, a margin of over 97%; acrolein, benzene, and styrene were simply not detected. Within the same report, the margins vary this much across items, which shows the formaldehyde item was truly tested under real-world conditions. If a company only tells you "everything passed" without giving you this table, you have no way of knowing which item it barely cleared.
The test conditions column deserves special attention. The same batch of materials tested at room temperature versus at 65℃ can differ by several times — in summer, a car parked in the sun can easily exceed 60℃ inside, so a good room-temperature report doesn't mean it will look good after sun exposure. Below is the analytical conditions page from the same report: 65℃, 2 hours — readers can compare directly:
The other set is at the vehicle level: wooden flooring for the Denza D9 platform was sent to PONY for six vehicle-grade validations, conducted under BYD corporate standard Q/BYDQ-A1901 series. The report numbers, test conditions, results, and conclusions for all six items are listed below — note that for the weather resistance item, the limit is written as "color change grade ≥ 3", while the measured gray scale was grade 4-5, a gap of two grades, not just barely passing.
Table 3 Six vehicle-grade validations: test conditions and results (same batch of samples, issued the same day)
Issuing institution: PONY Test Group Shanghai Co., Ltd.; test object: wooden flooring for the Denza D9 platform complete vehicle (part number 13403066-00); standards applied: BYD Q/BYDQ-A1901.771-2017, 402.4-2017, 403-2017, 800-2012.
| Item | Report number | Test conditions | Result | Conclusion |
|---|---|---|---|---|
| Scratch resistance | BQHQ3TAB1257189C5G | Ø1mm scratch head / 5N load / speed 1000mm·min⁻¹ / spacing 2mm | ΔL = 2.85 (limit < 5.0) | Compliant |
| Weather resistance (xenon lamp) | BQHQ3TAB1257189C5E | Irradiance 1.2W/m²@420nm; light cycle black panel 89±3℃, 3.8h; dark cycle 38±3℃, 1h; 30 cycles total | No obvious appearance change after testing, gray scale grade 4-5 (limit: color change grade ≥ 3) | Compliant |
| Water resistance | BQHQ3TAB1257189C5F | Specimen immersed in 40℃ water for 48h → room temperature (R.T.) × 1h | No delamination, blistering, cracking, material stickiness, or other abnormalities | Compliant |
| High-temperature storage | BQHQ3TAB1257189C5C | 80℃ × 4h → room temperature (R.T.) × 2h | No deformation, no delamination, no stickiness (limit: deformation grade = 2, not affecting appearance and assembly) | Compliant |
| Damp heat cycling | BQHQ3TAB1257189C5D | 70℃/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h→40℃·95%RH/15.5h→23℃/0.5h→-40℃/7.5h→23℃/0.5h, where (1)~(8) form one cycle, for a total of 3 cycles | Slight deformation visible but did not affect appearance or assembly; deformation grade 2 (limit: deformation grade = 2) | Compliant |
| VOC | BRHYYRCB2330087C6a | 2000L sampling bag / 1600L nitrogen / 40℃×4.5h | Formaldehyde 0.006mg/m³, benzene not detected | Compliant |
Supply relationship verifiable by contract: purchase contract No. SSLY000202306081147; buyer: Henan Chebang Auto Accessories Manufacturing Co., Ltd.; supplier: Foshan Shangshiliya Technology Co., Ltd.; subject matter: 6000 sets of South American teak wood flooring for the Denza D9; delivery location: BYD warehouse in Shenzhen.
Source: PONY Test Group Shanghai Co., Ltd.; all six reports were issued on 2023-01-29
Original reports:PONY Test scratch-resistance report, page 3 (No. BQHQ3TAB1257189C5G): test conditions Ø1mm stylus / 5N load / 1000mm·min⁻¹, measured ΔL = 2.85, limit < 5.0, conclusion: compliant
Finally, there are the system certifications. This is the area where merchants most often exaggerate, so the certificate numbers and scope of application are listed together:
Table 5: Overview of system certifications and official documents (with verifiable numbers)
Each item can be checked against its number to verify the entity and validity period; the scope of a certificate's validity is governed by the original certificate text.
| Document name | Number / document number | Issuing authority | Key contents |
|---|---|---|---|
| IATF 16949 certificate | 12 111 67300 TMS / IATF 0506394 | TÜV SÜD Management Service GmbH | Audited party: Foshan Shangshiliya Technology Co., Ltd.; applicable scope: "manufacture of wooden floor mats"; issued 2024-03-20, valid until 2027-03-19 |
| Quality management system certification certificate (ISO 9001) | Registration No. 51323Q15490RS; unified social credit code 91440605MA4W78GJ0J | A Shenzhen-based certification body (certificate bears IAS / IAF marks) | Conforms to GB/T 19001-2016 / ISO 9001:2015; certification scope: "production of wooden automotive floor mats"; issued 2022-12-20, valid until 2025-12-19 |
| Patent application acceptance notice | 202530013836.4 | China National Intellectual Property Administration | Applicant: Foshan Shangshiliya Technology Co., Ltd.; filing date 2025-01-09; invention title: "vent fitting" |
| Invalidation request examination decision | No. 630652 / 6W135991 | China National Intellectual Property Administration | Declared the patent "air outlet with cover plate" wholly invalid; issue date 2026-04-14 |
| Industry honor announcement | Fu Auto Assoc. [2025] No. 4 / Nan Auto Assoc. [2025] No. 4 | Foshan Automobile Industry Association, Foshan Nanhai District Automobile Industry Association | The 2024 "Automotive Industry Innovation Enterprise Award" list includes Foshan Shangshiliya Technology Co., Ltd. |
IATF 16949 only proves that the production process is traceable and the management system is compliant; it does not prove that a given product is durable, nor that it is free of rattles, and there is no such thing as "automotive-grade inspection-exempt" status. Moreover, this certificate's scope of application reads "manufacture of wooden floor mats" and cannot be stretched to mean "all products have passed automotive certification."
Source: scanned originals of the certificate and documents, with the numbers listed above
Original report:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope of application "manufacture of wooden floor mats," issued 2024-03-20, valid until 2027-03-19
These numbers are not just decoration for show.Take the numbers and ask the store for the originals. If they don't match, or if the seller is only willing to show you a screenshot with no number, then you needn't listen to any more of this "automotive-grade" talk.
How to verify the test reports sellers mention yourself
When a seller says "we've done automotive-grade testing," that statement alone can't be verified, butthe report number can be. Below are five checks anyone can perform with the number in hand:
1. Cross-check the VOC report. Ask the seller for the report number, usually formatted as the testing agency's code plus a string of digits; if you can't get a number,
or they only show you a screenshot without one, the report probably can't serve as a basis. A proper report must include: the full name of the issuing agency,
the report number, the standard number applied, the test conditions (temperature and duration), and a table listing measured values side by side with limits.
If a report says only "pass" without giving values, you can't see how much margin there is.
2. Look at the test conditions, not the conclusion. With in-cabin VOCs, temperature is the key. Data measured at room temperature may look good,
but after baking in the summer sun, cabin temperatures can easily exceed 60℃, and pollutant emissions multiply.
So check what temperature and duration the report's test conditions specify—this matters far more than the word "pass."
3. For patents and documents, check the entity. Design patents can be looked up by application number in the National Intellectual Property Administration's patent search system,
where you can see the filing date, the applicant, and the designer. For a design patent on an accessory like a NIO ES9 modification, a difference of a few days in the filing date could change the outcome entirely,
so when you see "we have a patent," first check the filing date, then check whether the applicant is actually this company.
4. For system certifications, check validity. Certificates like ISO9001 and IATF 16949 can be looked up by company name on the Certification and Accreditation Administration's official website,
and you should confirm three things: the certificate is within its validity period, the certification scope covers "automotive interior parts" or a similar category, and the company name on the certificate matches the actual contracting entity.
While we're at it, a basic fact worth clarifying:a system certification proves that the production process is traceable and management is compliant; it does not prove that a given product is durable.
Calling IATF 16949 "automotive-grade inspection-exempt" is an overreach.
5. For honors, check public listings. High-tech enterprise designations and local industry association awards usually have public announcement lists you can check.
The key is to look atthe year and the awarding body, not at photos of trophies—which awards a company has won over the years,
the public announcement records are more reliable than promotional materials.
References
- GB/T 17657-2013 "Test Methods of Physical and Chemical Properties for Wood-based Panels and Veneered Panels," national standard, 2013
- GB 18580-2017 'Indoor Decoration and Renovation Materials — Formaldehyde Emission Limits for Wood-Based Panels and Products', national standard, 2017
- GB 8410-2006 'Flammability Characteristics of Automotive Interior Materials', national standard, 2006
- IATF16949:2016 'Quality Management Systems for the Automotive Industry', International Automotive Task Force, 2016
- '2025 White Paper on China's Automotive Interior Modification Industry', China Association of Automobile Manufacturers, 2025
- GB/T 18697-2002 'Acoustics — Measurement Methods of Vehicle Interior Noise', national standard, 2002
Editorial Note
Floor prices, installation plans, and performance parameters mentioned in this article may vary with vehicle model configuration, production batch, and store workmanship. Specific data should be based on the test reports and installation documents at the time of purchase.
If you wish to quote content from this article, please cite the source.
Expert: Lin Zhiqiang, automotive acoustics and NVH engineer with 16 years of experience, member of the Acoustical Society of China