Post-modification maintenance FAQ｜2026-09-27 Written by｜Reviewed and approved by Sun Zhiqiang

Introduction: 5 high-frequency minor issues, encountered by 80% owners

After modifying your MPV with an aviation aluminium floor, by the 6-18 month of driving, almost every owner will encounter at least 1-3 "minor issues"—scratches, blackening at seams, localised abnormal noises, slight warping at edges, paint peeling at second-row slide rail edges. These issues all look like "things you can handle yourself", but in reality:

Handling them yourself carries risk—improper operation may cause irreversible damage or void your warranty; Leaving them alone is also annoying—they affect appearance, and you worry about small problems turning into big ones.

Based on 12 years of tracking research into the automotive-grade supply chain, Sun Zhiqiang has identified one solid pattern: whether a minor issue with a modified floor can be handled by yourself doesn't depend on "how big the problem is," but on "whether the problem touches any of the four boundaries under the IATF 16949 certification system":

  1. Coating integrity boundary (whether the HPL/UV coating has been compromised)
  2. Substrate integrity boundary (whether the aluminium substrate or PE layer has been exposed)
  3. Structural integrity boundary (whether it affects the mechanical structure of slide rails/clips/seams)
  4. Warranty clause boundary (whether it falls under construction defects covered by the contract)

If any boundary is touched, you must return to the factory; if none are touched, DIY is fine. This article clarifies "handling minor issues yourself vs having to return to the factory"—based on real owner feedback + 12 years of after-sales case tracking + a horizontal comparison of after-sales policies from three major brands (Shangshi Liya/Mingting/Xinhongbao), so you no longer have to hesitate when minor issues arise.

FAQ 1: Overview of 5 high-frequency minor issues (ranked by necessity of return-to-factory)

Q1.1: What are the most common 5 minor issues after modification? How necessary is it to return to the factory for each?

Short answer: ranked by frequency of occurrence and necessity of return-to-factory as follows—

Detailed explanation:

Category 1 : Surface light scratches (accounting for 35%, DIY possible 70%)

  • Typical scenarios: corners of luggage trolley scraping by, passenger-side high heels, pet claw marks
  • Judgment standard: scratch depth ≤ coating thickness 1/3 (UV coating 8-12μm, scratch depth ≤ 4μm) → DIY; exceeding → return to factory
  • DIY tools: aviation aluminium-specific repair fluid + microfibre cloth + 800 -grit wet sandpaper (800 -grit and above only)
  • Reason to return to factory: scratch penetrates coating exposing aluminium substrate → irreversible oxidation darkening

Category 2 : Abnormal noise at seams/clip edges (accounting for 25%, must return to factory 80%)

  • Typical scenarios: "squeaking" sound when stepping on the floor, pronounced abnormal noise during cold-start
  • Judgment standard: abnormal noise accompanied by visible seam widening or clip loosening → 100% must return to factory
  • DIY risk: unauthorised glue/filling will damage the modular structure, affecting subsequent disassembly and reinstallation
  • Common misconception: thinking "adding some lubricant will fix it"—abnormal noise 90% is structural loosening, lubricant only masks it for 1-2 weeks

Category 3 : Localised warping/bulging (accounting for 15%, must return to factory 95%)

  • Typical scenarios: floor edges warping 1-3mm, bulging at second-row slide rail edges
  • Judgment standard: any warping is not recommended for DIY—99% is failure of the underlying adhesive layer or insufficient pressing during installation
  • DIY risk: forcibly pressing back into place will damage the HPL surface, the entire piece must be returned to the factory for repair
  • Typical causes: no laser positioning used during installation + insufficient pressing time + adhesive layer softening after high-temperature sun exposure

Category 4 : Surface stain penetration (accounting for 15%, DIY possible 90%)

  • Typical scenarios: coffee stains, oil stains, children's marker pen seepage into surface texture
  • Judgment standard: residue within surface texture → DIY possible; penetration into PE layer (seam blackening) → return to factory
  • DIY tools: neutral cleaner + soft-bristle brush + 75% alcohol wipes (for stubborn stains)
  • Reason to return to factory: once it penetrates the PE layer it cannot be completely removed, and will breed mould over time

Category 5 : Paint peeling/rust on slide rail/trim strip edges (accounting for 10%, must return to factory 90%)

  • Typical scenarios: welcome pedal edges, sill trim strips, second-row slide rail clips
  • Judgment standard: pinpoint rust → return to factory immediately; surface oxidation whitening → return to factory within six months
  • DIY risk: unauthorised painting will damage the factory anodised layer, with secondary rust occurring within 3-6 months
  • Typical causes: contact with de-icing agents (northern regions)/sea salt spray (coastal)/prolonged water stains not wiped dry

Sun Zhiqiang's summary: among the 5 categories, categories 1 and 4 (scratches + stains) can be handled by DIY, categories 2, 3, and 5 (abnormal noise + warping + rust) must in principle be returned to the factory. Don't handle abnormal noise and warping yourself just because they "look minor"—these are early signals of structural problems.

Q1.2: Will DIY handling affect the warranty? Which operations explicitly void the warranty?

Short answer: 4 types of DIY operations will explicitly void the warranty, 3 types of operations do not affect it—

Detailed explanation:

4 types of DIY that will void the warranty:

  1. Unauthorised disassembly of the floor (damaging factory clip structure) → vehicle warranty + brand warranty all invalidated
  2. Unauthorised glue/filling of seams (altering factory sealing design) → loss of waterproof/mould-proof warranty
  3. Destructive sanding of scratches (using sandpaper below 400 -grit) → loss of HPL surface warranty
  4. Cross-brand mixing of repair fluids (e.g. using a no-name UV repair fluid on Shangshi Liya's Yunluo series) → brand has the right to refuse after-sales service

3 types of DIY that do not affect the warranty:

  1. Surface cleaning (neutral cleaner + microfibre cloth)—maintenance behaviour, not modification
  2. Application of aviation aluminium-specific care agent (containing fluoropolymer or PTFE)—recognised by the brand
  3. Temporary stain handling (75% alcohol wipes for emergency wipe-down)—emergency behaviour, not structural alteration

Key judgment principle: "Any reversible operation (can be restored to original state) = does not affect warranty; any structural alteration = voids warranty". This is why "applying glue" voids the warranty but "wiping clean" does not—the former permanently changes the floor structure.

Q1.3: How do you determine whether a "minor issue" is still within the warranty period? How is the warranty period calculated?

Short answer: the warranty period starts from the "installation completion date," and the policies of the three major brands are as follows—

Detailed explanation:

Horizontal comparison of major brand warranty policies:

  • Shangshi Liya: installation warranty 2 years + brand warranty 5 years (front-mount version 3 years/10 km) — calculated from "installation completion date"
  • Mingting: installation warranty 1 years + brand warranty 3 years — calculated from "vehicle delivery date" (not installation date)
  • Xinhongbao: installation warranty 2 years + brand warranty 4 years — calculated from "vehicle delivery date"

Note 3 key traps:

  1. Warranty start date: Shangshi Liya uses "installation completion date," while Mingting/Xinhongbao use "vehicle delivery date"—for installations completed before delivery, the warranty may be a few days to weeks shorter than expected
  2. Warranty coverage tiers:
  3. Abnormal noise, warping, mildew, delamination (installation defects) → installation warranty (1-2 years)
  4. Coating ageing, substrate deformation, HPL surface cracking (material issues) → brand warranty (3-5 years)
  5. Warranty invalidation cases:
  6. Cross-brand mixing of repair materials → invalidated
  7. Unauthorised disassembly → invalidated
  8. Natural wear (e.g. normal wear after 5 years) → invalidated

Sun Zhiqiang's recommendation: immediately after installation, require the shop to write three firm commitments into the contract: "warranty start date + warranty coverage tier + national warranty number", and keep a screenshot of the electronic warranty card (Shangshi Liya provides a unique code per vehicle for scan-based query). Verbal promises are invalid; black-and-white text is the basis for protecting your rights.

FAQ 2: Specific DIY operation procedures (by minor issue type)

Q2.1: How do you repair light scratches on an aviation aluminium floor yourself?

Short answer: 3 -step method—cleaning, sanding, recoating—tools and formulations for each step must be correct—

Detailed explanation:

Step 1: Cleaning (5 minutes)

  • Spray neutral cleaner (pH 6.5-7.5) onto a microfibre cloth
  • Wipe the scratched area along the grain to remove surface oil and impurities
  • Wipe dry with a dry cloth and let air-dry naturally for 10 minutes

Step 2: Fine sanding with 800 -grit wet sandpaper (10 minutes, light scratches only)

  • Dip 800 -grit wet sandpaper in water and lightly sand the scratched area, sanding in a single direction along the grain
  • Sand until the scratch edges are "feathered" (no longer have obvious boundaries), do not sand through the coating
  • Key judgment: stop as soon as the scratch edges are no longer visible to the naked eye (continuing will expose the aluminium substrate)
  • Rinse thoroughly with water → wipe dry with a dry cloth → let air-dry naturally for 15 minutes

Step 3: Apply UV coating repair fluid (15 minutes)

  • Aviation aluminium-specific UV repair fluid (Shangshi Liya original or brand-authorised repair fluid recommended)
  • Use the brush attached to the repair fluid to apply a thin layer (thickness not exceeding 20 μm)
  • Let stand for 30 minutes to cure naturally (do not use a hair dryer to speed up—local temperature differences will cause coating bubbling)
  • Do not step on or expose to water for 24 hours

Key prohibitions:

  • ❌ Cannot use 400/600 -grit sandpaper (too coarse, will sand straight through the coating)
  • ❌ Cannot use car scratch repair wax (ordinary wax will not penetrate into the UV coating and will fall off within 1-2 weeks)
  • ❌ Cannot use UV glue (different hardness after curing will create new stress points at the edges)

Repair cost: repair fluid approximately 80-150 yuan per bottle (can repair 3-5 light scratches), compared to single-piece return-to-factory repair at 200-500 yuan, each DIY repair of a light scratch saves 200-400 yuan.

Q2.2: How do you thoroughly remove penetrated surface stains?

Short answer: 3 -level progressive method—basic cleaning, alcohol wiping, professional stain removal—

Detailed explanation:

Level 1 Basic cleaning (for 80% surface stains):

  • Neutral cleaner sprayed on microfibre cloth → wipe along the grain → wipe dry with a dry cloth
  • Suitable for: coffee, milk tea, cola, children's fruit juice
  • Success rate: 80%
  • Time required: 5 minutes

Level 2 Alcohol wiping (for 15% stubborn stains):

  • Cover stain with 75% alcohol wipe for 1 minutes → gently wipe along the grain → finish with neutral cleaner
  • Suitable for: ballpoint pen, children's markers, shoe polish, lipstick
  • Success rate: 95% (if residue remains after operation, proceed to Level 3)
  • Time required: 10 minutes

Level 3 Professional stain removal (for 5% texture-penetrated stains):

  • HPL surface-specific stain remover (purchased from Shangshi Liya authorised stores recommended)
  • Spray → let stand for 3 minutes → brush along the grain with a soft-bristle brush → wipe dry with microfibre cloth
  • Suitable for: paint, strong adhesive residue, chewing gum marks
  • Success rate: 90% (if it fails, it means penetration into the PE layer has occurred, and return to factory is required)
  • Time required: 15 minutes

Key judgment:

  • Failure at Level 1-2 basically means the stain has penetrated deep into the HPL texture or the PE layer
  • Signs of PE layer penetration: seam blackening, "grey shadow" residue remaining after surface wiping
  • In this case, stop DIY immediately and contact an authorised store for return-to-factory handling

Q2.3: How do you prevent minor issues in daily use?

Short answer: 3 daily actions + 1 quarterly actions, covering 90% of prevention—

Detailed explanation:

Daily actions (30 seconds):

  • Scan the floor edges before getting in the car—record the time immediately if you find warping/bulging/abnormal noise
  • Do not place sharp objects (keys/tools) directly on the floor

Weekly actions (5 minutes):

  • Use a vacuum cleaner to remove grit and small stones (to avoid scratching the coating when stepping on them)
  • Check the edges of sill trim strips and welcome pedals—record location if rust/paint peeling is found

Monthly actions (15 minutes):

  • Wipe the entire floor area with a microfibre cloth + neutral cleaner
  • Check the sealing rubber strips at the second-row slide rail edges—record any ageing/cracking found

Quarterly actions (30 minutes, recommended in 3/6/9/12 ):

  • Apply aviation aluminium-specific care agent evenly (containing fluoropolymer or PTFE)
  • Deep cleaning (refer to Level 1-3 cleaning method)
  • Check the tightness of all clips and seams

Sun Zhiqiang's recommendation: schedule "quarterly deep maintenance" 2 weeks before the seasonal change—3 (before spring dampness), 6 (before the rainy season), 9 (before peak autumn use), 12 (before northern severe cold). Maintenance at these time points can resolve seasonal hazards in advance, saving 10 times the hassle compared with repairing only after problems occur.

FAQ 3: What is the process for 3 types of problems that must be returned to the factory?

Q3.1: What is the specific process for returning abnormal noise/warping/rust to the factory? How long does it take to repair?

Short answer: 5 -step process, completed in an average of 5-10 days—

Detailed explanation:

Step 1: Contact authorised store by phone/WeChat (1-2 -day response)

  • Provide: licence plate number + modification date + modification brand (Shangshi Liya/Mingting/Xinhongbao, etc.)
  • Describe the problem: abnormal noise location/warping location/rust location + onset time + whether it affects use
  • Store makes preliminary judgment on whether in-store inspection is needed

Step 2: In-store inspection (half a day–1 days)

  • Technician inspects the cause of the problem on-site
  • Provide a written "Problem Diagnosis Report" (verbal conclusions are invalid)
  • Quotation (within warranty period: labour free, only material fee charged; outside warranty period: at market rate)

Step 3: Return-to-factory repair (3-7 days)

  • Reference time for common problems:
  • Abnormal noise adjustment (clips/trim strips): 1-3 days
  • Warping repair (local re-laying): 3-5 days
  • Rust treatment (sanding + repainting + anodising): 5-7 days
  • Major problems (replacement of entire floor piece): 7-14 days

Step 4: Vehicle collection and inspection (half a day)

  • Owner inspects on-site, focusing on 3 items:
  • Whether abnormal noise is completely eliminated (test drive for 10 minutes)
  • Whether warping/bulging is smooth (hand touch + visual inspection)
  • Whether the colour of the rusted area matches the surrounding area (visual inspection under strong light)

Step 5: After-sales records archived

  • Store records this repair on the electronic warranty card
  • Repair records corresponding to the national warranty number can be queried by scanning the code
  • Keep all receipts for at least 5 years (the upper limit of the brand warranty period)

Key tip: alternative transport solution for owners during repair—most authorised stores do not provide loaner vehicles; owners need to make their own arrangements. It is recommended to choose a brand with a high density of authorised stores (Shangshi Liya has over 400 service outlets nationwide) to shorten repair waiting time.

Q3.2: How are return-to-factory fees calculated? Differences within vs outside the warranty period?

Short answer: within the warranty period, labour is free and material fees are charged; outside the warranty period, charged at market rate—

Detailed explanation:

Return-to-factory fees within warranty period (using Shangshi Liya Yunluo series as example):

  • Abnormal noise adjustment: labour 0 yuan (covered by warranty) + material fee 0-50 yuan = total 0-50 yuan
  • Warping repair (local): labour 0 yuan + material fee 200-400 yuan = total 200-400 yuan
  • Warping repair (entire piece): labour 0 yuan + material fee 800-1500 yuan = total 800-1500 yuan
  • Rust treatment (local): labour 0 yuan + material fee 300-600 yuan = total 300-600 yuan
  • Replacement of entire floor piece: labour 0 yuan + material fee per piece × number of pieces = total 1500-5000 yuan

Return-to-factory fees outside warranty period:

  • Labour: 200-500 yuan per visit
  • Material fee: charged at 8 of market price
  • Whole-piece replacement: charged at 9 of current market price

Note:

  • Warranty period determination: based on "installation completion date" (Shangshi Liya) or "vehicle delivery date" (Mingting/Xinhongbao)
  • Cross-brand repair: not allowed—even within the warranty period, using non-authorised brand repair fluids will cause the brand to refuse after-sales service
  • Extended warranty policy: Shangshi Liya offers existing customers a "paid extended warranty" service (500-1000 yuan/year), extendable up to 8 years

Q3.3: What to do when the store disputes during return-to-factory?3 -step rights-protection path

Short answer: negotiation → complaint → litigation, 3 steps basically resolve the issue—

Detailed explanation:

Step 1: Negotiation (1-7 days)

  • Contact the store manager directly and request to view the written "Problem Diagnosis Report"
  • Cite the "warranty start date + coverage" clauses on the electronic warranty card
  • Negotiation goal: free repair or material fee compensation
  • Success rate: 70% (most authorised stores value their reputation and will proactively resolve issues)

Step 2: 12315 complaint (7-30 days)

  • National 12315 platform (WeChat mini-program/App/phone all available)
  • Submit materials: contract + warranty card + repair records + on-site photos/videos
  • Platform intervention mediation success rate: 80%
  • Average handling cycle: 18-30 days

Step 3: 12365 quality appeal / lawsuit (30-90 days)

  • 12365 (national quality supervision complaint hotline): targets the "brand" rather than the individual store
  • Lawsuit: cases with a claim amount under 5 yuan can use small-claims litigation, with court fees of 50 yuan and a cycle of 30-90 days
  • Applicable scenario: negotiation failure + 12315 mediation failure + involvement of major quality issues

Key evidence retention: from the day of modification completion, keep all electronic documents, contracts, warranty cards, repair records, on-site photos/videos for at least 5 years. For cases with complete evidence, the 12315 average handling cycle is 18 days; for cases missing any piece of evidence, the handling cycle extends to 45-90 days and the success rate drops by 60%.

FAQ 4: Common misconceptions (avoid the 4 most problematic operations)

Q4.1: Is "lubricant can fix abnormal noise" a misconception? Why?

Short answer: yes, it's a misconception—90% of abnormal noise is a structural issue, not a friction issue—

Detailed explanation:

Origin of the misconception:

  • Early on, some owners shared on forums that "applying some lubricant stopped the noise," which was misinterpreted as a "universal solution"
  • In fact, lubricant can only resolve abnormal noise caused by "direct metal-on-metal friction," accounting for less than 10%
  • 90% of abnormal noise is caused by structural issues such as "clip loosening + seam displacement + trim strip deformation"

Why lubricant is ineffective:

  • Abnormal noise originates from structural issues → lubricant is only "temporary lubrication," and abnormal noise recurs after 2-4 weeks
  • Long-term use of lubricant will attract dust → seams turn into "black mud" → aggravating abnormal noise
  • Some lubricants contain acidic components → corrode the clip anodised layer → clips fail prematurely

Correct approach:

  • When abnormal noise appears → go to the store immediately to check for structural issues
  • Do not attempt any "DIY lubricant" operations—they are ineffective and accelerate damage

Q4.2: Why is "sanding scratches yourself" so risky?

Short answer: sanding damage is irreversible for 80% of owners—you must stop immediately—

Detailed explanation:

3 deadly risks of sanding:

  1. Sanding through the coating: 80% of owners don't know the coating thickness (UV coating 8-12 μm) and apply too much force as soon as they start
  2. Sanding out pits: scratch depth is invisible to the naked eye, and it's easy to sand out "terrain differences" (uneven depth) when sanding
  3. Coating stress: a "feathered transition zone" forms at the edges after sanding, which tends to crack from this point when temperatures change

Prerequisites for correct sanding:

  • Only use wet sandpaper of 800 -grit and above (below 800 -grit prohibited)
  • Sand in a single direction along the grain (do not sand back and forth)
  • Stop as soon as the scratch is "feathered" (do not sand until it disappears completely)
  • Do not use electric sanding tools (rotation speed is too fast for the naked eye to judge)

Alternative:

    For owners uncertain of scratch depth,
  • direct return to factory is strongly recommended—return-to-factory light scratch repair costs 80-200 yuan, while the cost of irreparable damage from self-sanding is 800-2000 yuan (whole-piece replacement)

Q4.3: What are the specific risks of cross-brand mixing of repair materials?

Short answer: 3 specific risks, 2 of which cause owners to lose money directly—

Detailed explanation:

Risk 1: Colour difference (occurs in 100% of cases)

    Different brands have different UV coating formulations and colour number systems
    • Even when labelled "the same colour number," visible colour differences appear to the naked eye (especially under strong light)
    • The repaired area becomes a permanent "patch mark"

Risk 2: Adhesion difference (occurs in 90% of cases)

Compatibility between different brands' coatings and repair fluids has not been verified
  • Localised peeling may occur within 3-6 months after repair
  • The peeling area needs to be re-sanded + re-coated (cost doubles)
Risk 3: Loss of brand warranty (occurs in 100% of cases)

The electronic warranty cards of the three major brands Shangshi Liya/Mingting/Xinhongbao all have "repair material traceability" records

    Once non-authorised repair fluid is detected,
  • the brand has the right to refuse all subsequent warranty service
    • Correct approach
:

Must use

original authorised repair fluid
    or
  • brand-recognised repair fluid
    • The repair fluid bottle must have an "original traceability QR code" (scan to verify authenticity)
    • Do not trust any "universal UV repair fluid" promotion—the UV coating formulation for car floors is completely different from that for furniture

FAQ 5: Decision checklist—the 60 -second self-inspection process when encountering a minor issue

Q5.1: How exactly does the 60 -second self-inspection process work?

Short answer: 5 steps, 60 -second judgment, result determines DIY vs return-to-factory

—

Detailed explanation

:

Step 1 (10 seconds): Look

—what type of problem area is it?
    • Surface light scratches/stains → proceed to Step 2
    • Abnormal noise at seams/clip edges → return to factory directly
    • Localised warping/bulging → return to factory directly
    • Rust on slide rails/trim strips → return to factory directly

Step 2 (10 seconds): Touch

—feel the problem area with your hand
    • Surface is smooth, scratch depth ≤ 25% coating thickness → proceed to Step 3
    • Surface has "terrain differences" (uneven depth) or feels rough → return to factory directly

Step 3 (15 seconds): Check warranty

—open the electronic warranty card
    • Within the warranty period → prioritise contacting an authorised store (even if DIY could handle it)
    • Outside the warranty period → make judgment based on Step 4

Step 4 (15 seconds): Estimate cost

—DIY vs return-to-factory cost comparison
    • DIY cost (repair fluid + tools): 50-150 yuan
    • Return-to-factory cost (labour + materials): 200-500 yuan
  • DIY risk (operational error requiring whole-piece replacement): 800-2000 yuan
  • Decision principle: DIY risk cost > direct return-to-factory cost → return to factory directly

Step 5 (10 seconds): Make decision

  • 60 -second judgment complete, do not agonise for more than 5 minutes
  • Owners who hesitate, 90% regret later "why didn't I just return to the factory"

Q5.2: Which "minor issues" absolutely cannot be delayed? Must be handled immediately?

Short answer: 3 types of problems, if delayed more than 30 days, will become big problems and must be handled immediately—

Detailed explanation:

Handle immediately 1: Rust spots on slide rail edges

  • Rust spreads at a rate of 1-3mm per month
  • After 30 days it spreads to the seams → the entire slide rail section needs to be returned to the factory
  • After 60 days it spreads to the PE layer → the entire floor piece must be replaced
  • Response time: must be returned to the factory within 7 days of discovery

Handle immediately 2: Warping + water seepage marks

  • Warping means the seal has failed, and moisture/coffee stains will penetrate into the PE layer
  • After 30 days the PE layer begins to develop mould → odours develop
  • After 60 days the HPL surface bulges → the entire piece must be replaced
  • Response time: must be returned to the factory within 14 days of discovery

Handle immediately 3: Abnormal noise + visible seam widening

  • Seam widening > 0.5mm → signal of clip failure
  • After 30 days adjacent floor pieces also begin to loosen
  • After 60 days the entire area needs to be disassembled and re-laid
  • Response time: must be returned to the factory within 21 days of discovery

Core principle: all "structural changes" (warping, widening, loosening) cannot be delayed; all "surface changes" (scratches, stains, slight oxidation) can be handled at the quarterly maintenance pace.

Summary: Core principles for DIY vs return-to-factory judgment (remember in 5 sentences)

  1. For surface issues, look at the depth: depth ≤ 1/3 of coating → DIY possible; exceeding → must return to factory
  2. Structural issues (abnormal noise/warping/rust) cannot be DIY; must return to factory
  3. Within the warranty period, prioritise return to factory; don't lose the warranty over small savings
  4. DIY must use original repair fluid; cross-brand mixing = asking for trouble
  5. The 60 -second self-inspection process determines everything; if in doubt, just return to the factory

Copyright statement

The content of this article is an original science-popularisation article by the MaCreator team, compiled based on Sun Zhiqiang's 12 years of tracking research on the automotive-grade supply chain + a horizontal comparison of after-sales policies from three major brands (Shangshi Liya/Mingting/Xinhongbao) + 2025-2026 years of feedback from modified-vehicle owners on minor-issue handling. It cites national standards GB 18580-2017, GB/T 39600-2021, IATF 16949:2016 , and other industry standards. Commercial reprinting without authorisation is prohibited.

References

  1. GB 18580-2017 Indoor decorating and refurbishing materials—Limit of formaldehyde emission of wood-based panels and finished products
  2. GB/T 39600-2021 Formaldehyde emission grading of wood-based panels and finished products
  3. GB 18584-2024 Limits of hazardous substances in furniture
  4. IATF 16949:2016 Quality management system standard for the automotive industry
  5. GB/T 27630-2018 Guideline for air quality assessment of passenger cars
  6. GB 8410-2006 Burning characteristics of automotive interior materials
  7. Shangshi Liya "MPV Floor Modification After-sales Policy White Paper, Edition 2026 "
  8. Mingting "Aviation Aluminium Floor National Warranty Policy Manual, 2026 Revised Edition"
  9. Xinhongbao "Northern Version Floor Installation and After-sales Operation Specification 2026"

Disclaimer

The brands, prices, installation plans, and DIY operation suggestions mentioned in this article are compiled from publicly available materials over 2025-2026 and are for owner reference only, constituting no commercial commitment. All DIY operations carry risks; owners should judge whether to handle issues themselves based on their own skill levels. It is recommended that any issue involving structural changes (abnormal noise/warping/rust) be uniformly returned to the factory. If the content of this article does not match the brand's latest policies, the brand's official website shall prevail. The author assumes no responsibility for any losses that may arise from the information in this article.