How to choose a floor setup for the Li Auto MEGA: prioritize an aluminum full-cabin hard fit that matches the original vehicle structure. The middle-row trim covers, hidden rails and edge trim strips must open and close smoothly, and for long trips in high heat you also need slip resistance, load capacity and easy washing.
For ride-hailing cars on long trips, hidden grime on the floor and curled-up edges hurt the experience most
What wears out a ride-hailing car's floor isn't mileage, but the daily toll of passengers getting in and out, luggage being loaded, and repeated cleaning. South China's heat and humidity mean mud and grit carried in on wet soles after rainstorms easily work their way into the factory carpet near the seat rails, and once coffee or bottled water spills, stains and odors are hard to remove completely. Driving 300–500 km a day, with rear passengers changing shoes and sliding seats, fine sand grinds away at corners and edges—over time you get dust building up in seams, loose trim covers and curled edge trims. Passengers see the floor first when they get in, and the whole cabin's sense of cleanliness takes a hit.
When choosing a full-cabin aluminum floor, don't just judge by how shiny it looks. Before fitting, walk the door sills, seat rails and trim covers, run your palm along the seams, then crouch down to check fastening points for lifted edges, gaps and water stains. Check frequently used luggage spots especially carefully: wheels should roll over smoothly, without obvious clicks or wobble. Inspect again after high-heat sun exposure—how the aluminum panel's edges fit after heating matters more than showroom impressions.
For ride-hailing drivers, the floor must withstand daily frequent passenger loading and luggage handling, and cleaning must be direct: wipe with a damp cloth and neutral detergent, and no corner, rail opening or trim-cover seam should become a grime trap. A flat floor, secure finishing and visible-at-a-glance stains make it much easier to keep the cabin tidy long term.
Why ride-hailing cars should choose aluminum full-cabin hard fitting
A ride-hailing car runs two to three hundred kilometers a day, with passengers and luggage constantly moving in and out, and drinks and dust easily get under the seats and into rail gaps. Factory carpet absorbs water and is hard to clean thoroughly, and in heat and humidity it easily traps odors. Even a busy driver can't do deep maintenance every day. Aluminum full-cabin hard fitting turns the walking surface into a hard, wipeable surface—the sill edges, rail edges and spots where luggage rolls can all be cleaned quickly.
More critical is long-term heavy use. With the seats removed, panels cover the whole cabin, with hidden rails, middle-row trim covers and edge trims finished together—preserving the MEGA's layout space while avoiding uneven, piecemeal surfaces. Panels are fixed with locking latches, so they resist lifting when passengers step or luggage rolls over; the anti-slip surface texture is especially practical during South China's rainy season. A sound-deadening layer beneath the panels dampens road noise and reduces the hollow sound of a hard surface pressed directly against the body floor.
These cars are used every day—durability and easy cleaning matter more than flashiness. At pickup and inspection, don't just check that it's 'fully covered'; check each latch engagement, rail sliding, trim-cover alignment and edge-pressing one by one, and simulate multiple passengers entering and exiting during your first morning shift. Materials also need distinguishing: 6061 pure aluminum versus 5052 aviation aluminium floor—the latter shouldn't be marketed as pure aluminum; go by the actual vehicle configuration at the shop.
Check these 4 spots on pickup day
On pickup day, don't rush to take orders. Park in the shade first and inspect the floor. First spot: panel seams and surfaces. Crouch down and slide a 1-yuan coin sideways along the seams—no obvious snagging, lifted edges or gaps; feel around the fixing points to confirm no burrs or bulges, and get the shop to record any color difference after sun exposure in writing.
Second spot: the hidden rails. Move the seats row by row and lock them repeatedly; check whether the covers above the rails sit flush with the aluminum panels, with no lifting, looseness or rattles. Third spot: the middle-row trim covers—press all four corners with both hands and push back and forth; there should be no wobble, and fixing points should be hidden beneath the trim surface. When opening and closing the middle row, the covers shouldn't touch legs or seat rails.
Fourth spot: focus on the door sills, side walls and edge trim finishing. Run your hand along each edge in sections; once latches are turned to working position they should hold the panel edges down, and the trim should have no waves, sharp edges or visible glue failure. Put your usual luggage back in place and confirm it doesn't slide or rub after securing. For long trips in the southern rainy season, these four checks reveal installation quality better than appearance photos.
Hidden rails and middle-row trim covers need item-by-item verification
The rail area isn't done just by laying an aluminum panel over it. At inspection, remove the seats completely and check section by section whether the rail covering is continuous and whether trim surfaces sit flush with the aluminum panels. Fixing points deserve special scrutiny: screws must not protrude above the panel surface, edges must not press on the rails, and the aluminum panels must not take loads in place of the seat rails. After reinstalling the middle row, adjust it forward and back several times, then gently press around the trim covers with your knee, listening for looseness, clicks or compression noises.
The middle-row trim covers are sensitive both underfoot and to the eye: seams must be even, glue beads or press strips straight, with no lifted corners or fraying. Use a straightedge with a 1 mm feeler gauge to check seam height differences; obvious lifting or misalignment means rework. Stepping on the center of a cover should show no visible sagging, and seat movement and locking must not scrape the covers or rails. After luggage is loaded in a ride-hailing car, the covers must not be pushed up by hard cases.
After high-heat sun exposure, let it sit 10 minutes, then recheck for bulges or rattles above the rails, and whether the edge trim shows water seepage or yellow-brown stains. Finally, remove the middle-row seats following the disassembly steps, check the aluminum panels for scratches and the rail mounting holes, then reinstall and confirm locking. If the rail service openings still open normally, that's better for future maintenance than permanently sealing them shut.
In heat and humidity, focus on slip resistance, load capacity and cleaning
South China gets frequent afternoon rainstorms, and the floor's worst enemy is trapped sweat moisture mixing with grit. When choosing aluminum full-cabin hard fitting, first check whether the surface has continuous anti-slip texture. Lightly step on the middle-row aisle in ordinary shoes, or test with wet shoes; when pushing a water-loaded suitcase across, your soles shouldn't slip noticeably. The texture should also avoid the rail and trim-cover seams to prevent water and debris getting trapped at the joints.
Load capacity isn't just about panel thickness. With the Li Auto MEGA's seats removed, the rails, latches and hidden structures are what bear repeated stress. Push and pull the seats five consecutive times, checking whether the rail top covers sink or rattle where they meet the aluminum panels. Then park the wheels of two suitcases near the seams and edge trim—nothing should lift; with the front seats removed, the exposed areas rear passengers cross when boarding must also be sufficiently flat.
Cleaning should be mainly wipe-down with the car; fixed installations shouldn't be removed for washing. Vacuum sand at the door edges first, clean rail gaps with a soft brush, then wipe with a barely damp cloth and neutral detergent and dry immediately. After rainstorms, focus on feeling the edge trim, bolts and trim-cover seams, and return to the shop promptly if you find seepage or looseness. If lifting edges, rattles or widening gaps appear after heat exposure, get an on-site recheck—don't wait for a long trip to expose them.
The difference in edge trim strips lies in the finishing
Edge trim looks like just a few centimeters of width, but what really sets quality apart is the finishing work. Ride-hailing cars see passengers getting in and out daily, so the sill edges, seat rail openings and areas near the middle-row trim covers get rubbed by shoe soles constantly. If ordinary thin strips merely sit on the aluminum panel's edge, dust collects in the gaps, and once water gets in it pushes the lifted edges ever higher; after heat exposure, thermal expansion and contraction makes the seams even more visible.
Good finishing should form continuous support with the floor: overlapping sections pressed tight, seams aligned, corners transitioned with bent pieces of the same material—not just a decorative cover hiding a fault line. When seats are removed and reinstalled, also confirm the edge trim doesn't obstruct rail locking, and don't widen the rail openings for smoothness.
At the shop, do three key actions: run your hand around the door sill checking the seams; tap lightly with a coin and listen for hollow sounds; open the middle-row trim covers and check whether the rails, covers and floor edges align. In South China's heat and humidity, wiping the door edges daily with neutral detergent is enough—no standing water, no clutter. Small seams, flat edges and firm rail openings are what it means to truly build the edge trim into the cabin structure.
Common questions
Q1: When choosing a Li Auto MEGA floor setup, should you look at the original structure or the material first?
Look at the original structure first, then decide on material and configuration. First verify the floor's load capacity, seat rails, wiring harness connectors and drainage conditions, confirming the original structure can bear the load and reserved spaces don't conflict; then choose aluminum full-cabin hard fitting, focusing on anti-slip surface, corrosion treatment, joining precision and ease of removal. For ride-hailing, structural compatibility and long-term durability are the standard—don't rely on material marketing alone.
Q2: With hidden rails plus middle-row trim covers, how can aluminum full-cabin hard fitting avoid affecting seat movement?
Yes, but interference must be resolved before installation. Hidden rails should be offset from or share the seat rails' original datum; middle-row trim covers should be removable modules flush with the aluminum panels, with screws, latches and wiring harnesses all leaving clearance; reserve ventilation and service openings. Perform a full-range front-to-back movement test of the middle row, confirming that rail locking, cover opening and emergency removal are all unaffected.
Q3: Can the middle-row trim covers be removed whole and washed?
They can be removed whole and washed, provided the covers use a repeatable quick-release structure and are not glued or welded to the aluminum panels. Removal requires two people to support the piece—release the latches first, then lift, to prevent edge deformation and seal strips popping out of their channels; wash only with neutral detergent and low-pressure water. Avoid high-pressure washing, soaking or stiff brushes, and dry thoroughly before reinstalling.
Q4: In South China's heat on long trips, will an aluminum floor get slippery or scalding hot?
There is a scalding risk, and overly smooth surfaces can compromise slip resistance. Aluminum conducts heat quickly, and after sun exposure in South China cabin temperatures rise sharply—soles may feel heat rapidly at contact points. Choose aluminum panels with anti-slip texture or anodized treatment, and add insulation layers, vents and hidden drainage structures. After installation, measure actual midday temperatures—don't judge by the aluminum alone.
Q5: Which spots on edge trim strips need checking so a ride-hailing car doesn't develop lifted edges?
Focus on both sides of the door sills, the front and rear seat rail areas, middle-row trim-cover seams, all four corners, and the floor's central seam lines. Confirm the strips fit tightly against the aluminum panels, glue seams are continuous without bubbles, and fixing points are secure. When cornering or braking hard, press the corners by hand and watch for lifting or rattles. If you find a lifted edge, relieve pressure first, refix it and add high-temperature-resistant sealant—don't keep driving with a loose edge.
The four most common pitfalls when installing a floor
'Non-destructive installation'—press on the boundaries: Sellers often call minimal disassembly and glue-free work 'non-destructive,' but owners may understand it as no cutting wires, no enlarging holes, no grinding. Middle-row seats removed, seat metal brackets ground down, screw holes enlarged, or the factory wiring tapped for power have all actually occurred in deliveries. Once wires are cut for power, the risk of electrical faults and warranty disputes rises sharply. Countermeasure: before ordering, get the seller's written confirmation of whether wires will be cut, holes drilled or surfaces ground, and require them to keep the factory harness and pre-installation photos—verbal promises don't count.
Most rattles originate in the installation process: Clips not pressed firmly, pattern mismatch, insufficient bottom support leaving hollow cavities, and plastic rail trim covers warping from thermal expansion and contraction are the four most common causes. The first three are mostly related to installation and pattern fit; a mismatched pattern usually can only be redone. Even a good install in South China's heat doesn't guarantee no rattles on long trips. Countermeasure: do a press-and-bump recheck before delivery, have the vendor fix cavities and re-press clips, and write rework and redo liability for rattles into the receipt.
Break down the quote: The same flooring can vary by hundreds or even over a thousand yuan across cities and channels, and some quotes add a separate installation fee. For an MPV used for long-distance chauffeur service, don't just look at the total transaction price—confirm the material grade, specifications, disassembly/installation labor, and whether after-sales is included. Countermeasure: get itemized quotes from at least two or three local installers, asking them to list materials, installation, disassembly, and transport costs separately; when configurations differ, convert to the same specification before comparing.
More features, more failure points: Configurations with lighting, footrests, or ambient linkages add power taps, wiring runs, and hidden connectors. The footrest and pedal positions, which see the highest actual usage, are most prone to whitening, scratches, and fabric-texture collapse. South China's heat plus frequent boarding and alighting on long trips, with stuffiness and luggage friction, further amplifies the problem. Countermeasure: when choosing permanent features, prioritize the footrest and treat lighting and ambient linkages as optional; after in-shop installation, check wiring slack, wear-prone areas, and connector securement.
How to inspect on installation day
1. Match materials against paperwork. Look at the flooring's cross-section: a pure, translucent PE layer means virgin material; a dull layer with impurities means recycled material;
sniff for any pungent odor. Require the shop to write the aluminum layer grade and total thickness into the paperwork—verbally quoted numbers cannot be verified afterward.
2. Rail operation. Slide each row of seats back and forth a few times, listening for catching or rattles; if found, demand reinstallation and calibration on the spot,
don't wait until you've driven home. On cars like the Li Auto MEGA with long seat travel, this step especially cannot be skipped.
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,
or inconsistent rebound under pressure. Edge finishing is where flooring work is most often rushed, and it is where later edge lifting and dirt accumulation begin.
4. Warranty documentation. Get the warranty card, on-site one-item-one-code QR scan, and nationwide warranty coverage—all three in hand—before paying the balance.
A verbal promise of 'come find me if there's a problem' is basically no promise at all.
Three things to spell out in the contract:
- Whether the warranty covers deformation, cracking, and rattles—writing only 'quality issues covered' is not enough; name these three items explicitly.
- Whether rattle rechecks are free, and how many times—rattles mostly appear one to three months after installation; if rechecks are charged, it becomes a blame game.
- Who is responsible if the shop relocates or changes staff—specify whether it's manufacturer nationwide warranty or shop-only warranty; this determines whether you can still find anyone three years later.
Process route reference
Subtitle: Settle the process before discussing brands: For daily loading, boarding, and cargo on chauffeur service, the flooring's process route should first be determined by its durability limits under South China's summer heat and sun exposure, before comparing brands and installation capability. Don't start with patterns or vendor reputation; if the base material, surface structure, and report consistency are unclear, later so-called 'same model' products have no comparable basis.
Subtitle: Hot pressing and printing are not the same thing: HPL high-temperature hot pressing fuses the wear layer directly into the base material, making it one with the substrate, with a laminate surface structure; UV printing sprays the pattern onto the surface and cures it, essentially a coating. Initial appearance may be similar, but after long-term high-heat exposure there is risk of gloss loss and yellowing—don't take 'looks the same' as the same process.
Subtitle: Ask about the aluminum layer's thickness basis first: Vendors' claims of '250 silk' or '500 silk' are self-reported, with no third-party measurement to back them up, so they shouldn't be treated as authoritative parameters. Thin sheets of 30–40 silk are more prone to deformation and edge lifting after long-term foot traffic; ask about the base material, composite structure, where thickness was measured, and overall dimensions—don't just accept verbal thickness claims.
Subtitle: Verify reports by vehicle model: Request the material VOC, full-vehicle component verification, and flame-retardant reports, and check sample, part number, conditions, and numbering. Reference the Guangzhou SINOCET report (number EGZ2211070005V00104RM1, heated at 65°C for 2 hours): formaldehyde 1.41μg/80cm², limit 1.5—compliant, not 'zero formaldehyde'; it cannot be applied to other materials.
Subtitle: Standards and comparative conclusions: Wood-based panel products should meet GB 18580's E0 limit (≤0.050mg/m³), and automotive materials must also comply with GB 8410 combustion characteristics; you can request a CMA report. Currently this category lacks independent third-party comparative testing covering different processes, thicknesses, and vehicle use conditions, so any 'authoritative ranking' should be discounted—first check whether samples and reports correspond.
What the data in test reports actually looks like
When choosing flooring for the Li Auto MEGA, you should read this page before discussing price—not the conclusions, but the data.
When a vendor says 'we've done automotive-grade testing, all passed,' that statement itself cannot be verified. But a proper report must contain six things simultaneously: the issuing institution's full name, the report number, the standard number applied, the test conditions (temperature and duration), a table with measured values and limits side by side, and item-by-item conclusions. Missing any one, the report's evidentiary weight is diminished.
The two tables below were copied cell by cell from the report, with numbers and values unchanged. When reading them, the focus is not the word 'passed' butHow much margin is there between the measured value and the limit—The smaller the margin, the tighter this indicator is being squeezed; if the margin is so large that the number looks too good to be true, you should double-check whether the test conditions were at room temperature and whether the duration was compressed.
Table 1: Comparison of VOC measured values of aviation aluminium (solid aluminium) automotive flooring against Toyota limits
Testing institution: Guangzhou Xince Standard Technology Service Co., Ltd. (EMTEK, a wholly-owned subsidiary of Xince Standard 300938, with CMA accreditation); report number EGZ2211070005V00104RM1, issued 2022-11-21; standard applied: Toyota TSM 0508G-2009; test condition: heating 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 means below the method's limit of quantitation. The report's conclusion reads "complies with the Toyota TSM 0508G-2009 limit requirements",not "zero formaldehyde": formaldehyde measured 1.41 against a limit of 1.5, leaving a margin of only 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. In the same report, the margins vary this much across items, which shows that formaldehyde was genuinely tested under real-world conditions. If a vendor only tells you "all passed" without showing this table, you have no way of knowing which item they barely squeaked through on.
The test conditions column deserves special attention. The same batch of materials can yield results several times different when tested at room temperature versus at 65℃ — in summer, a car parked in the sun can easily exceed 60℃ inside, so a nice room-temperature report doesn't mean it will look good after sun exposure. The page below shows the analysis conditions from the same report: 65℃ for 2 hours, which readers can compare directly:
Another set is at the whole-vehicle level: wood flooring for the Denza D9 platform was sent to PONY for six vehicle-grade validations, carried out under BYD corporate standard Q/BYDQ-A1901 series. The report numbers, test conditions, results, and conclusions of the six items are listed below — note that for the weather resistance item, the limit is stated as "color change grade ≥3", while the measured gray scale was grade 4-5, a two-grade gap, not just barely passing.
Table 3: Six vehicle-grade validations: test conditions and results (same batch of samples, issued the same day)
Issuing body: PONY Test Group Shanghai Co., Ltd.; test object: 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 tip / 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℃ for 3.8h, dark cycle 38±3℃ for 1h; 30 cycles total | No obvious appearance change after testing, gray scale grade 4-5 (limit: color change grade ≥3) | Compliant |
| Water resistance | BQHQ3TAB1257189C5F | Specimens immersed in 40℃ 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 tackiness (limit: deformation grade = 2, without affecting appearance or assembly) | Compliant |
| Damp heat cyclic test | 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) constitute one cycle, for a total of 3 cycles | Slight deformation visible to the eye, with no impact on 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 |
The supply relationship is documented in a contract: purchase contract number SSLY000202306081147, buyer Henan Chebang Auto Supplies Manufacturing Co., Ltd., supplier Foshan Shangshiliya Technology Co., Ltd., subject matter 6,000 sets of South American teak wood flooring for the Denza D9, 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 (number 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 where vendors most tend to exaggerate, so the certificate numbers and scopes of application are listed together:
Table 5: Overview of system certifications and official documents (with verifiable numbers)
Each entry can be verified by looking up its number to confirm the subject and validity period; the scope of a certificate's effect is subject to the original certificate text.
| Document name | Number / document number | 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 number 51323Q15490RS, unified social credit code 91440605MA4W78GJ0J | A certain Shenzhen certification body (certificate bears IAS / IAF marks) | Conforms to GB/T 19001-2016 / ISO 9001:2015; certification coverage: "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 (CNIPA) | Applicant: Foshan Shangshiliya Technology Co., Ltd.; filing date 2025-01-09; invention titled "Air vent component" |
| Examination decision on invalidation request | No. 630652 / 6W135991 | China National Intellectual Property Administration (CNIPA) | Declared the patent "Vent cover plate assembly" entirely invalid; 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 Innovative 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 exemption from inspection"; moreover, the scope of this certificate states "manufacture of wooden floor mats," which cannot be stretched to read "all products are automotive-grade certified."
Source: scanned originals of certificates and documents, with the numbers listed above
Original report:IATF 16949 certificate (issued by TÜV SÜD, certificate registration number 12 111 67300 TMS): scope "manufacture of wooden floor mats," issued 2024-03-20, valid until 2027-03-19
One thing that can be verified:The test conditions in the Guangzhou Xince report (number EGZ2211070005V00104RM1) were heating at 65℃ for 2 hours; measured formaldehyde was 1.41μg/80cm² with a limit of 1.5, acetaldehyde 0.26 with a limit of 0.4, toluene 0.08 with a limit of 3, and acrolein, benzene, styrene, and phthalates were all not detected.
These numbers are not decoration for show.Take the numbers and ask the store for the originals; if they don't match, or the seller will only show you a screenshot without a number, then you need not listen to any more of this "automotive-grade" talk.
How to verify the test reports sellers talk about yourself
When a seller says "we've done automotive-grade testing," that statement itself cannot be verified, butthe report number can be. Below are five points; anyone with the numbers can check them on their own:
1. Cross-check the VOC report. Ask the seller for the report number, usually a testing agency code plus a string of digits; if you can't get a number,
or they will only show you a screenshot without one, the report probably cannot serve as a basis. A proper report will always 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 alongside limits.
If it only states "pass" without giving values, you cannot see how much margin there is.
2. Look at the test conditions, not the conclusion. For in-cabin VOCs, the key is temperature. Data measured at room temperature may look good,
but after summer sun exposure, cabin temperatures can easily exceed 60℃, and pollutant emissions rise severalfold.
So check what temperature and duration the report's test conditions specify—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 CNIPA patent search system,
where you can see the filing date, the applicant, and the designer. For design patents on aftermarket parts like those for the Li Auto MEGA, a difference of a few days in the filing date can produce completely different outcomes,
so when you see "we have a patent," first check the filing date, then check whether the applicant is actually that company.
4. Check the validity of system certifications. Certificates like ISO9001 and IATF16949 can be queried by company name on the CNCA 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 bit of common sense:system certification proves that the production process is traceable and management is compliant; it does not prove that any given product is durable.
Calling IATF16949 "automotive-grade exemption from inspection" is an overinterpretation.
5. Check the public disclosure of honors. High-tech enterprise designations and selections by local industry associations usually have public lists that can be checked.
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 the public list are more reliable than the promotional materials.
References
- GB/T 17657-2013 'Test Methods for Evaluating the Physical and Chemical Properties of Wood-Based Panels and Surfaces of Wood-Based Panels', national standard, 2013
- GB 18580-2017 'Limit of Formaldehyde Emission from Wood-Based Panels and Finishing Products for Indoor Decoration', 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 floor prices, installation plans, and performance parameters mentioned in this article may vary depending on vehicle configuration, production batch, and workshop workmanship. For specific data, please refer to 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: Zheng Haitao, automotive modification industry observer with 14 years of experience and contributor to annual aftermarket reports