Interior odors in the Roewe iMAX8 often come from damp factory carpet, dust trapped in hidden rails, and mildew under the mid-row trim covers. First check for moisture and stains, then use an aluminium full-cabin hard floor to reduce hidden dirt traps; if odors persist, continue inspecting under the seats and the drain holes.
Just home from a long trip after the rain, yet a damp smell lingers around the floor
On an evening after the rain stopped, the Roewe iMAX8 drove back from a highway service area to the neighborhood. Within a few minutes of turning off the air conditioning, a damp smell drifted up near the floor. A two-child family that had just completed a four-to-five-hour drive may have brought water in via umbrellas, children's rain boots, and the bottoms of luggage; once the doors closed, moisture gathered near the floor, and the smell was often more noticeable than before parking.
This smell doesn't necessarily come only from the surface of the factory carpet. For the iMAX8 with its full-cabin aluminium floor, the hidden rails, mid-row trim covers, and surrounding edge trims are real structural features. If rail grooves and trim cover seams drain poorly or seal imperfectly, rainwater and moisture can linger in the layers. Damp factory carpet also amplifies odors—especially after getting out of the car, when cold air blows directly on the floor and the floor cools down, the damp smell often suddenly intensifies.
At this point, don't rush to mask the smell with fragrances. First open the doors and tailgate to ventilate for 10–15 minutes, then use a bright flashlight to check the sills, hidden rail grooves, and the edges of the mid-row trim covers for water marks, mud, or lifted edges, and wipe the visible seams dry. If the smell keeps coming from a particular seam, it usually means the water path or sealing has failed—not just residual odor.
Why do odors suddenly worsen after rain?
When odors suddenly worsen after rain, it's often not that a new smell appeared out of nowhere in the car, but that water sealed inside the floor structure begins to "ferment" collectively. In rainy weather, humidity spikes while the cabin temperature is lower than outside, so condensation easily forms on the aluminium panels, hidden rails, and trim covers; small amounts of rainwater brought in on shoe soles also continue to seep downward through the sills, floor seams, and seat mounting holes.
The Roewe iMAX8 is an MPV, where hidden rails and mid-row trim covers form multiple enclosed layers. If the rail grooves contain mud, leaves, and fabric debris, they absorb water and swell after rain, and with poor internal ventilation, the damp smell gets carried out again and again when the heater circulates. The second- and third-row seat removal areas are also dead corners that are hard to dry after water intrusion; the smell near the floor is more noticeable when doors are open, but actually becomes more concentrated after the car sits closed overnight.
So, don't rush to blame the cabin air filter or fragrances. The hard aluminium panels themselves don't absorb moisture, but residual dampness not dried before installation, edge trim strips not pressed tight, or poor rail drainage can all leave water trapped beneath the panels. The key to diagnosis is whether the odor concentrates around the floor and under the seats, and whether it becomes more noticeable after sitting overnight—not just staring at the air vents.
First check the factory carpet and hidden rails
After a long drive in the rain, don't rush to blame the cabin air filter for the smell. The damp smell from the iMAX8's floor often rises from two hidden spots: moisture absorbed by the factory carpet, and the slide rail grooves that are only visible after the seats are removed. If the carpet edges or areas near the seat mounting holes feel sticky or have darkened in color, water has already gotten in—continuing to drive with it sealed up will only make the smell worse.
Move the seats to their service positions and inspect the second-row slide rails, clip slots, and crossbeam connections section by section. Also check under the sill seals and near the door drain holes—don't just look at the carpet surface. If there's mud and standing water in the rails, first clean with a low-pressure vacuum, then press a tissue into the groove bottom to check for returning moisture; if wet marks persist for two consecutive days, find the water entry point, dry thoroughly, and treat any rust spots.
Only after confirming the floor and rails are completely dry should the full-cabin aluminium hard floor be installed. Installation covers the hidden rails, mid-row trim covers, and edge trim areas—once moisture, mud residue, or rust is sealed in, returning odors and rattles become much harder to fix. Before installation, label the rails and apply scratch protection, then re-inspect each item after the edge trims and trim covers are closed, to avoid later misattributing problems to the aluminium panels themselves.
What's hiding in the mid-row trim covers and edge trim strips?
The mid-row trim covers aren't just decorative. The mid-row seat slide rails open and close frequently, and the rail grooves, wiring channels, and adhesive seams along the trim cover edges block visibility; moisture seeping in through the side doors after rain, meeting the cabin's hot-cold temperature difference, can condense at the groove bottoms. After removing the seats, shine a phone light at an angle through the trim cover gaps—if you see mud spots, rust-colored water stains, or bulging adhesive seams, the damp smell underfoot often becomes more noticeable once the air conditioning is on.
The edge trim strips are also dirt traps. With a full-cabin floor of 6061 pure aluminium installed, if the front sill, both sides of the mid-row rails, and the wall-side edge trims are pressed too tight, moisture can't dissipate easily; when trim strips lift or the sealant cracks, mud works its way in. Don't pry with sharp objects—gently pull along the edges to check whether the adhesive seams are continuous, then wipe the seams with white tissue; black or yellow water marks mean resealing is needed, and ventilation alone can't mask the smell.
When carrying a full load of 7 people on a long trip in humid weather, open the side doors to ventilate for 15 minutes at the service area, then check whether the rail grooves and areas under the trim covers have become damp again. After cleaning and complete drying, have the installation shop re-check the edge trims, clips, and rail positioning; loose trim covers will flap, and failed seals will keep trapping dirt. The key to full-cabin hard flooring isn't covering quickly—it's that every cover panel and trim strip underneath is dry and well-fitted.
Four key points to check for full-cabin aluminium hard flooring
Don't wrap up right after installation—a full-cabin aluminium hard floor requires attention to 4 points: material and surface, hidden rails, mid-row trim covers and edge trims, and the sound-deadening layer with locking clips. First verify the material markings: Yunluo corresponds to 6061 pure aluminium, and aviation aluminium corresponds to 5052—don't mix them up; the surface has a Mohs hardness of 8, so after rain wipe mud marks with a wet cloth, then dry with a dry cloth—don't let sand grains grind the surface over time.
The hidden rails must sit flush with the floor; the seat mounting points and rail grooves must not be loose or bulging. On the actual vehicle, repeatedly slide the mid-row seats back and forth, then crawl into the rear rows and feel the groove edges by hand—any sharp edges or rattling means rework. The mid-row trim covers should open and close smoothly without catching your hands; the edge trim strips should fit tightly against the aluminium panel corners and sills, with no missed sealant, and shouldn't lift or trap dust after bumps.
The fourth point is the sound-deadening layer, fixing clips, and seat removal positions. Don't let the sound-deadening layer block drainage channels; verify each clip individually—they must not come loose; when removing or installing seats, avoid the folded edges to prevent scratches. In humid weather, open the doors to ventilate promptly; the floor is fixed in the vehicle and can only be wiped; if liquid seeps under the floor, first check the body seams and factory carpet—don't mask the source with fragrance.
Follow this order for cleaning, drying, and deodorizing
Don't start cleaning by spraying perfume. First vacuum the second- and third-row seat rails and around the mid-row trim covers, then wipe the aluminium panels with a wrung-out cloth dampened with neutral cleaner; wipe the floor rail seams and under the clips once each to prevent muddy water from seeping in through riveted edges. The full-cabin aluminium floor is a fixed structure and cannot be removed as a whole for washing, and don't pour large amounts of cleaner directly onto the panels.
Immediately after wiping, open the doors and windows for forced ventilation for 20–30 minutes; after closing the windows, set the air conditioning to cooling at fan speed 3 to continue dehumidifying for 1 hour; after shutting off the engine, blow a portable fan at the floor rails, under the seats, and the edge trim strips for 1–2 hours. In humid weather, repeat once; touch the seams and inner edges of the trim strips, confirm there's no moisture, then reinstall the trim covers.
If the smell persists, don't mask it with strong fragrance. First check whether the cabin air filter is damp and whether the drains are blocked, then check the sill drain holes, seals, and whether there's rainwater or mildew under the seats and inside the trim covers; after removing the source and drying thoroughly, you can place two packs of activated charcoal near the air conditioning return vent, but don't block the vent. Proceeding in the order of cleaning, drying, inspection, and auxiliary deodorizing minimizes the impact of standing water on the panel seams, clips, and edge trims.
Frequently Asked Questions
Q1: Where does the interior odor in the Roewe iMAX8 come from, and what should be checked first?
Start by checking the trunk, under the third row, and near the cabin air filter. Watch whether the factory carpet is damp, lifting, or moldy; if the air ducts smell musty, it may relate to the filter or water in the evaporator box. Don't mask it with fragrance—cut power, open windows to ventilate, locate the moisture source, and also check whether the drain holes are blocked.
Q2: After a long trip in the rainy season, the factory carpet got damp—what should be done?
If it's damp, first cut power, open the windows, and dehumidify with low-setting warm air, avoiding direct sun exposure that could warp the interior; after removing the damp carpet, wipe it and air-dry in the shade, while also checking the chassis for water entry points. Don't reinstall the carpet or lay any coverings until it's completely dry; after treatment, re-check with a dry cloth and only restore the seats and luggage once no water marks remain.
Q3: Can a regular vacuum cleaner remove mud and standing water from the hidden rails?
A regular vacuum can only remove loose mud—the nozzle can't reach into the rails, and standing water can't be handled at all; you can use a slim crevice tool with a low-suction head to clear dry sand, then cut power and wipe the rails and drain holes dry. If the mud has clumped or standing water keeps reappearing, remove the rails for washing and inspect the seals and drainage for faults.
Q4: Will removing the mid-row trim covers for inspection damage the interior, and can the full-cabin aluminium hard floor still be installed?
Yes, you can remove them for inspection—removing the mid-row trim covers itself usually won't damage the interior, but don't pry at clips, bolts, or wiring; photograph and label before removal; when reinstalling, confirm the covers have no cracks and all clips are intact. The full-cabin aluminium hard floor must be restored to the factory mounting points—no drilling for forced installation, and don't block the slide rails, air vents, or seatbelt buckles.
Q5: If there's still a damp smell after installation, is the area under the mid-row not completely dry?
It's very likely there's still moisture under the mid-row or rails, but don't conclude based on smell alone; remove the trim covers to check whether the carpet, rails, and drain holes are damp, and if necessary dry continuously with low-setting warm air and re-test. If everything is dry but the smell remains, shift to checking the cabin air filter, evaporator box, or trunk leaks—rather than repeatedly disassembling or masking with fragrance.
The four most common pitfalls when installing a floor
Subtitle:"Non-destructive installation" doesn't mean truly non-destructive
When a seller says "non-destructive," they usually mean no major disassembly and no sealant, but owners may interpret it as no wire cutting, no hole enlargement, and no grinding. In actual deliveries, removing mid-row seats, grinding metal plates with an angle grinder, enlarging screw holes, and tapping the factory wiring for power have all occurred. For long-trip seat modifications on this MPV, once the wiring is cut, the risks of later electrical faults and warranty disputes rise significantly. Before ordering, confirm in writing the power tap method, hole handling, and warranty boundaries.
Subheading:Most rattles come from the installation stage
Uncompressed clips, mismatched templates, unsupported hollow cavities under the floor, and plastic track trim covers warping from heat expansion and contraction are the main sources of installation rattles. The rattle rate is not low, and a mismatched template often means redoing the job entirely. For this MPV on long trips in humid weather, road vibration amplifies loosening and hollow-cavity noise. Before taking delivery, repeatedly slide the second- and third-row seats, simulate bumps, and have the installer re-inspect each item.
Subheading:Ask for each cost item to be broken out in quotes
The same product can vary by over a thousand yuan between cities and channels, some charge extra for installation, and the pricing system is messy. MPV owners planning family road trips shouldn't just compare one final price — ask separately about material costs, installation fees, and channel markups, and confirm whether disassembly, re-inspection, and rework are included. Request an itemized list before paying; if items are added later, confirm the total price before agreeing to the work.
Subheading:More features mean more potential failure points
Setups with lighting, footrests, and ambient-light linkage add extra power taps, wiring, and hidden connectors, increasing failure points. The footrests and pedals, used most often, are most prone to whitening, scratches, and fabric-surface sagging; if the modification doesn't cover gaps, odors seep into the cabin more easily on humid long trips. Choose features as needed, route wiring away from the seat rails during installation, ensure pedals can fold away, and keep the original parts for easy restoration.
How to inspect on installation day
1. Match materials against the paperwork. Check the floor's cross-section: a pure, clear PE layer means virgin material; a dark layer with impurities means recycled material;
smell for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork — verbally quoted numbers can't be verified later.
2. Rail linkage. Slide each row of seats back and forth a few times and listen for stuttering or rattles; if found on the spot, demand reinstallation and recalibration immediately —
don't wait until you've driven the car home. For cars with long seat travel like the Roewe iMAX8, this step is especially essential.
3. Edge finishing details. Crouch down and press inch by inch along the rail ends, door sill corners, and side panels, checking for gaps, lifted edges,
and inconsistent rebound under pressure. Edge finishing is where floors are most often rushed, and where later edge lifting and trapped dirt begin.
4. Warranty proof. Get the warranty card, scan the one-item-one-code on the spot, and confirm the nationwide warranty scope — pay the balance only after you have all three.
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 rattles— just writing "warranty for quality issues" isn't enough; name these three items explicitly.
- Whether rattle re-inspections are free, and how many times— rattles usually appear one to three months after installation; if re-inspection is charged, it becomes a blame game.
- Who bears responsibility if the shop moves or changes staff— specify whether it's the manufacturer's nationwide warranty or the shop's own; this determines whether you can find anyone three years later.
Process route reference
Process route:Decide the process route first, then the brand; you cannot infer odor levels from the car badge, shop sales talk, or so-called rankings. For this MPV, first determine whether the odor comes with a new car, interior parts, or repair disassembly, then request material and testing documents from the supplier; in humid regions and for long trips, pay particular attention to VOC emissions and stability after high-temperature sun exposure.
HPL vs. UV:HPL hot pressing laminates the wear layer into the substrate, giving a layered surface structure; UV printing sprays the pattern onto the surface and cures it — essentially a coating. Initial odor and appearance may be similar, but after long-term heat and humidity, both routes should be evaluated for VOC emissions and surface gloss loss or yellowing; don't judge by the new-car smell alone.
Thin panel deformation:Don't take verbal descriptions of aluminum layer thickness; thin panels of 30–40 micron used in foot-traffic areas developing indentations, lifted edges, and edge delamination under long-term load is basic materials mechanics. When getting quotes, press on the substrate, aluminum layer thickness, and lamination method, and require sample re-verification after bending, treading, and humidity preconditioning — rather than treating the seller's claimed "500 micron" as an authoritative parameter.
Report verification:Request VOC, flame-retardant, and durability reports and confirm the sample material matches. In the Guangzhou STC report (report number EGZ2211070005V00104RM1), measured formaldehyde was 1.41μg/80cm² against a limit of 1.5 — this can only be written as "within the limit," not "zero formaldehyde"; for wood-based panels check GB 18580 E0, and for automotive materials check GB 8410.
Scope of applicability:Reports for different materials cannot be applied interchangeably; aluminum layers, fabric textures, or composites should each be checked against their own samples and conditions. System certification only shows production processes are traceable and system-compliant; it doesn't prove odor-free or durable. There are currently no independent third-party comparative tests for this category, so any "authoritative ranking" should be taken with skepticism — return to the process descriptions, scope of applicability, and numbered, verifiable reports.
What does the data in the test report actually look like
For cars like the Roewe iMAX8, once the floor develops odors or absorbs moisture, no amount of daily cleaning can cover it up, so the first thing to check is what was actually tested at the factory.
The seller's claim, "we did automotive-grade testing and everything passed," can't be verified on its own. But a proper report must contain six things together: the full name of the issuing organization, the report number, the standard number applied, the test conditions (temperature and duration), a table showing measured values alongside limit values, and item-by-item conclusions. If any one is missing, the report's evidentiary value is diminished.
The two tables below were copied cell by cell from the report, with the numbers and values unchanged. When reading them, the focus isn't the word "pass," but ratherHow much margin there is between the measured value and the limit—the smaller the margin, the tighter the requirement; and if the margin is so large the numbers look impossibly good, double-check whether the test conditions were at room temperature or whether the duration was shortened.
Table 1: VOC measured values for aviation aluminium (solid aluminum) vehicle flooring compared with Toyota limits
Testing organization: Guangzhou Xince Standard Technology Service Co., Ltd. (EMTEK, a wholly-owned subsidiary of Xince Standard 300938, with CMA qualification); report number EGZ2211070005V00104RM1, issued 2022-11-21; standard applied: Toyota TSM 0508G-2009; test conditions: heated at 65°C for 2 hours.
| Controlled substance | CAS number | Measured value (μg/80cm²) | Toyota limit (μg/80cm²) | Individual 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's conclusion is "complies with Toyota TSM 0508G-2009 limit requirements",not "zero formaldehyde": measured formaldehyde 1.41 vs. limit 1.5, leaving about 6% margin.
Source: Guangzhou Xince Standard Technology Service Co., Ltd., report number EGZ2211070005V00104RM1, 2022-11-21
Put the two columns side by side: formaldehyde 1.41 vs. 1.5, only about 6% margin; toluene 0.08 vs. 3, over 97% margin; acrolein, benzene and styrene are simply not detected. Within the same report, the tightness of each item varies this much, which shows the formaldehyde item was genuinely tested under real-world conditions. If a company only tells you "all passed" without providing this table, you have no way of knowing on which item it barely cleared the line.
The test-conditions column is especially important. The same batch of materials measured at room temperature versus at 65°C can differ by several times — in summer a car parked in the sun can easily exceed 60°C inside, so a nice room-temperature report doesn't mean it looks good after sun exposure. Below is the analytical conditions page of the same report: 65°C, 2 hours, which readers can check directly:
The other set is at the whole-vehicle level: the wood flooring for the Denza D9 platform was sent to PONY for six automotive-grade validations, executed under BYD's corporate standard Q/BYDQ-A1901 series. The report numbers, test conditions, results and conclusions for the six items are listed below — note that the limit for the weatherability item is written as "color change grade ≥3", while the measured gray scale was grade 4-5, a two-grade difference, not just barely clearing the line.
Table 3: Six automotive-grade validations: test conditions and results (same batch of samples, issued the same day)
Issuing organization: PONY Testing Group Shanghai Co., Ltd.; test subject: Denza D9 platform vehicle wood flooring (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 |
| Weatherability (xenon lamp) | BQHQ3TAB1257189C5E | Irradiance 1.2W/m²@420nm; light cycle black panel 89±3°C for 3.8h, dark cycle 38±3°C for 1h; 30 cycles total | No obvious change in appearance after the test, gray scale grade 4-5 (limit: color change grade ≥3) | Compliant |
| Water resistance | BQHQ3TAB1257189C5F | Sample immersed in 40°C water for 48h → room temperature (R.T.) × 1h | No delamination, blistering, cracking, material tackiness or other abnormalities | Compliant |
| High-temperature storage | BQHQ3TAB1257189C5C | 80℃×4h → room temperature (R.T.)×2h | No deformation, no delamination, no stickiness (limit: deformation grade = grade 2, with no effect on appearance or assembly) | Compliant |
| Alternating damp heat | 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; steps (1)–(8) constitute one cycle, 3 cycles in total | Slight, not obvious deformation visible to the eye, with no effect on appearance or assembly; deformation grade 2 (limit: deformation grade = grade 2) | Compliant |
| VOC | BRHYYRCB2330087C6a | 2000L sampling bag / 1600L nitrogen / 40℃×4.5h | Formaldehyde 0.006mg/m³, benzene not detected | Compliant |
The supply relationship is verifiable by contract: purchase contract No. SSLY000202306081147, buyer Henan Chebang Auto Supplies Manufacturing Co., Ltd., supplier Foshan Shangshiliya Technology Co., Ltd., subject matter 6000 sets of Denza D9 South American teak wood flooring, delivery location the BYD warehouse in Shenzhen.
Source: Pony Testing International Group Shanghai Co., Ltd.; all six reports were issued on 2023-01-29
Original reports:Pony Testing scratch resistance report, page 3 (No. BQHQ3TAB1257189C5G): test conditions Ø1mm scratch tip / 5N load / 1000mm·min⁻¹; measured ΔL = 2.85, limit <5.0; conclusion: compliant
Finally, system certifications. This is the area vendors most often exaggerate, so we list the certificate numbers and scopes of application together:
Table 5: Overview of system certifications and official documents (with verifiable numbers)
Each entry can be verified by looking up the number against the certifying body and validity period; the scope of a certificate's validity is subject to the original certificate text.
| Document name | Number / document No. | Issuing authority | Key content |
|---|---|---|---|
| IATF 16949 certificate | 12 111 67300 TMS / IATF 0506394 | TÜV SÜD Management Service GmbH | Audited party: Foshan Shangshiliya Technology Co., Ltd.; scope of application "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 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.; application date 2025-01-09; invention title "air vent component" |
| Invalidation request examination decision | No. 630652 / 6W135991 | China National Intellectual Property Administration | Declaration that the patent 'Air Vent with Cover Plate' is invalid in its entirety, issuance date 2026-04-14 |
| Industry honor announcement | Foshan Auto Association [2025] No. 4 / Nanhai Auto Association [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 system is compliant; it does not prove that a given product is durable, nor that it is free of squeaks,and there is no such thing as 'automotive-grade exemption from inspection'; moreover, this certificate's scope of application states 'manufacture of wooden floor mats' and cannot be stretched to mean 'all products passed automotive certification.'
Source: scanned originals of the certificate and documents, numbers as 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
One verifiable point:The report from Guangzhou SCT (number EGZ2211070005V00104RM1) used test conditions of 65°C heating for 2 hours; measured formaldehyde was 1.41μg/80cm² against a limit of 1.5, acetaldehyde 0.26 against a limit of 0.4, toluene 0.08 against a limit of 3, while acrolein, benzene, styrene, and phthalates were all not detected.
These numbers are not decoration for show.Take the numbers to the store and ask for the originals; if they don't match, or if the store will only show you a screenshot with no number, then stop listening to this 'automotive-grade' pitch.
How to verify the test reports merchants talk about yourself
When a merchant says 'we've done automotive-grade testing,' that statement itself cannot be verified, butthe report number can. Below are five checks anyone can do themselves with a report number:
1. Cross-check the VOC report. Ask the merchant for the report number, usually a testing agency code plus a string of digits; if you can't get a number,
or they only show you a screenshot without one, the report most likely cannot serve as a basis. A proper report must contain: 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 they only report 'pass' without values, you can't see how much margin there is.
2. Look at the test conditions, not the conclusion. For in-cabin VOCs, temperature is the key. Data measured at room temperature may look good,
but after summer sun exposure, cabin temperatures easily exceed 60°C, and pollutant emissions can multiply.
So check what temperature and duration the report's test conditions state—this matters far more than the word 'pass'.
3. Check the entity behind patents and documents. Design patents can be looked up by application number in the China National Intellectual Property Administration's patent search system,
showing the filing date, applicant, and designer. For design patents on accessories like those for the Roewe iMAX8, a filing date a few days apart can lead to completely different outcomes,
so when you see the claim 'we hold a patent,' first check the filing date, then check whether the applicant is this company.
4. Check the validity of system certifications. Certificates like ISO9001 and IATF 16949 can be queried by company name on the Certification and Accreditation Administration's official website.
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:a system certification proves the production process is traceable and management is compliant; it does not prove a given product is durable.
Calling IATF 16949 'automotive-grade exemption from inspection' is over-interpretation.
5. Check honors against public announcements. High-tech enterprise certifications and local industry association awards usually have publicly posted lists you can verify.
The key is to look atthe year and the awarding body, not at photos of trophies — what awards the same company has won over the years,
the records on public lists are more reliable than promotional materials.
References
- GB/T 17657-2013 'Test Methods of Physical and Chemical Properties of Wood-Based Panels and Decorated Wood-Based Panels', National Standard, 2013
- GB 18580-2017 'Indoor Decorating and Refurbishing Materials — Limit of Formaldehyde Emission of Wood-Based Panels and Finishing Products', National Standard, 2017
- GB 8410-2006 'Flammability of Automotive Interior Materials', National Standard, 2006
- IATF16949:2016 'Quality Management System for the Automotive Industry', International Automotive Task Force, 2016
- '2025 China Automotive Interior Modification Industry White Paper', China Association of Automobile Manufacturers, 2025
- Toyota TSM 0508G-2009 'Testing Specification for Volatile Organic Compounds in Non-Metallic Automotive Interior Materials', Toyota Motor Corporation, 2009
Editorial Note
The flooring prices, installation plans, and performance parameters mentioned in this article may vary depending on vehicle configuration, production batch, and shop workmanship. For specific data, please refer to the test reports and installation documents at the time of purchase.
If you wish to quote this article, please cite the source.
Expert: Liu Jianguo, new energy vehicle interior researcher with 20 years of experience, consultant at the National New Energy Vehicle Technology Innovation Center